You searched for subject:(Population dynamics).
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Addis Ababa University
1.
Fanaye, Tadesse.
Socio-Economic Determinants of Fertility in Urban Ethiopia
.
Degree: 2008, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/5196 
► Fertility, being a major study unit in population dynamics, should be analyzed from different perspectives as it plays a pivotal role in understanding the complex…
(more)
▼ Fertility, being a major study unit in
population dynamics, should be analyzed from different perspectives as it plays a pivotal role in understanding the complex issues integral to
population growth. The main objective of this study was therefore to understand what the micro level major socio – economic determinants of fertility are in the case of urban Ethiopia. These determinants of fertility were initially hypothesized to include education, income, age at first marriage, marital status, child mortality and participation of women in income generating activities. The direction of relationship between the variables and fertility was expected to be positive for martial status and child mortality while a negative relationship was speculated for the other variables.
Count data models were used to estimate fertility, given by the number of children born by a woman, using two data sets: the Ethiopian Urban Socio-economic Surveys, a panel data conducted for five rounds comprising of 1,500 households, and the Ethiopian Demographic and Health Survey (2005), a nationally representative cross sectional data. The main findings of the result supported the hypothesis that education, income, age at first marriage and participation of women in income generating activity are negatively related to fertility. The expected positive relationship between marriage and fertility was also validated by the study. Child mortality was, however, found to be insignificant in explaining fertility in urban areas.
The findings of the study revealed that fertility decision is influenced by the analyzed socio-economic variables and achieving a low level of fertility rate requires an all rounded sustainable development process that could result in increased education, income, creation of employment opportunities and improved status of women in the society.
Advisors/Committee Members: Mulat Demeke (PhD) (advisor).
Subjects/Keywords: Fertility; Population dynamics
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APA (6th Edition):
Fanaye, T. (2008). Socio-Economic Determinants of Fertility in Urban Ethiopia
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/5196
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fanaye, Tadesse. “Socio-Economic Determinants of Fertility in Urban Ethiopia
.” 2008. Thesis, Addis Ababa University. Accessed March 28, 2020.
http://etd.aau.edu.et/dspace/handle/123456789/5196.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fanaye, Tadesse. “Socio-Economic Determinants of Fertility in Urban Ethiopia
.” 2008. Web. 28 Mar 2020.
Vancouver:
Fanaye T. Socio-Economic Determinants of Fertility in Urban Ethiopia
. [Internet] [Thesis]. Addis Ababa University; 2008. [cited 2020 Mar 28].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/5196.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fanaye T. Socio-Economic Determinants of Fertility in Urban Ethiopia
. [Thesis]. Addis Ababa University; 2008. Available from: http://etd.aau.edu.et/dspace/handle/123456789/5196
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Aberdeen
2.
Barlow, Emily J.
Ecological and genetic perspectives on dispersal in European shags (Phalacrocorax aristotelis).
Degree: 2011, University of Aberdeen
URL: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=182248
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.554298
► Dispersal is a fundamental ecological and evolutionary process that can create demographic and genetic linkage between neighbouring and distant locations, influencing the dynamics, structure and…
(more)
▼ Dispersal is a fundamental ecological and evolutionary process that can create demographic and genetic linkage between neighbouring and distant locations, influencing the dynamics, structure and ultimately the persistence of populations. To understand observed population dynamics and structure and to predict future change, accurate and comprehensive data are required describing the pattern and magnitude of dispersal and gene flow across all relevant spatial scales. However, this is a major empirical challenge. In this thesis, I aimed to obtain comprehensive empirical data quantifying natal dispersal patterns and population genetic structure across multiple spatial scales using the European shag (Phalacrocorax aristotelis) as a model species. I used a combination of field observations of shags individually ringed on the Isle of May, Scotland and molecular genetic techniques to accomplish these aims. By locating adult shags that had been ringed as chicks on the Isle of May at their breeding locations across eastern Scotland, I demonstrated divergent dispersal distributions at small versus large spatial scales. Using both mitochondrial DNA markers and a newly developed set of microsatellite markers, I quantified population genetic structure across a pan-European scale. This was weak across both molecular markers suggesting a role for occasional effective long-distance dispersal. However, a suite of evolutionary forces besides gene flow can create observed population genetic structure. Therefore, I quantified population genetic structure across populations in eastern Scotland, and quantitatively linked this indirect estimate of gene flow with my direct field observations of dispersal. Dispersal parameters derived explicitly from field observations and the spatial organisation of populations were shown to strongly influence observed population genetic structure. Overall, these data demonstrate the need to utilise both field observations and genetic methods to comprehensively estimate the extent and effectiveness of dispersal and highlight the importance of accurately quantifying long-distance dispersal in particular for predicting future change.
Subjects/Keywords: 598.43; Population ecology : Population Dynamics : Shag (Bird)
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APA (6th Edition):
Barlow, E. J. (2011). Ecological and genetic perspectives on dispersal in European shags (Phalacrocorax aristotelis). (Doctoral Dissertation). University of Aberdeen. Retrieved from http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=182248 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.554298
Chicago Manual of Style (16th Edition):
Barlow, Emily J. “Ecological and genetic perspectives on dispersal in European shags (Phalacrocorax aristotelis).” 2011. Doctoral Dissertation, University of Aberdeen. Accessed March 28, 2020.
http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=182248 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.554298.
MLA Handbook (7th Edition):
Barlow, Emily J. “Ecological and genetic perspectives on dispersal in European shags (Phalacrocorax aristotelis).” 2011. Web. 28 Mar 2020.
Vancouver:
Barlow EJ. Ecological and genetic perspectives on dispersal in European shags (Phalacrocorax aristotelis). [Internet] [Doctoral dissertation]. University of Aberdeen; 2011. [cited 2020 Mar 28].
Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=182248 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.554298.
Council of Science Editors:
Barlow EJ. Ecological and genetic perspectives on dispersal in European shags (Phalacrocorax aristotelis). [Doctoral Dissertation]. University of Aberdeen; 2011. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=182248 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.554298
Texas A&M University
3.
Sun, Mengmeng.
Regional Climate Effect on Population Abundance of Major Duck Species in Interior Plains of Canada.
Degree: 2013, Texas A&M University
URL: http://hdl.handle.net/1969.1/149518
► Population dynamics of ducks is a complex process influenced by both biotic and abiotic factors, and good understanding about the mechanisms behind this process is…
(more)
▼ Population dynamics of ducks is a complex process influenced by both biotic and abiotic factors, and good understanding about the mechanisms behind this process is needed not only for the management of duck harvest but also for the conservation of wetland, which is under threat in the face of land change and climate warming. Basic time series analysis techniques, such as correlogram, partial correlogram and periodogram, cluster analysis and partial least squares regression (PLSR) are applied to the long-term breeding
population data gathered by Waterfowl Breeding
Population and Habitat Survey and monthly weather data from Environment Canada in order to explore the pattern in the duck abundance data and the effect of local weather on
population dynamics of ducks.
Results of above analysis show that the duck abundance of previous years has short but strong correlation with the duck abundance of following years suggesting a large part of variability in duck abundance is explained by the abundance of previous years, especially that of last year. There is also clear periodic pattern in the duck abundance data, but the length of the cycle varies both for duck species and ecozones suggesting separating duck species and ecozones for analysis is necessary. The effects of weather on duck populations appear weak or absent in most PLSR models; this is consistent with previous studies. More detailed information, such as age structure of the duck populations and interspecific interactions, will be needed for future modeling. Among the small number of PLSR models exhibiting the weather effect, results suggest potential mechanisms, such as the impact of weather on recharge and discharge of wetland basins and nest failure caused by flooding.
Advisors/Committee Members: Fujiwara, Masami (advisor), Huang, Jianhua (committee member), Grant, William E. (committee member).
Subjects/Keywords: climate; population dynamics; duck
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APA (6th Edition):
Sun, M. (2013). Regional Climate Effect on Population Abundance of Major Duck Species in Interior Plains of Canada. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/149518
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sun, Mengmeng. “Regional Climate Effect on Population Abundance of Major Duck Species in Interior Plains of Canada.” 2013. Thesis, Texas A&M University. Accessed March 28, 2020.
http://hdl.handle.net/1969.1/149518.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sun, Mengmeng. “Regional Climate Effect on Population Abundance of Major Duck Species in Interior Plains of Canada.” 2013. Web. 28 Mar 2020.
Vancouver:
Sun M. Regional Climate Effect on Population Abundance of Major Duck Species in Interior Plains of Canada. [Internet] [Thesis]. Texas A&M University; 2013. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/1969.1/149518.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sun M. Regional Climate Effect on Population Abundance of Major Duck Species in Interior Plains of Canada. [Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/149518
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Victoria University of Wellington
4.
Neilson, Conor Stewart Bruce.
There and back again: Spatial and temporal variation in the recruitment dynamics of an amphidromous fish.
Degree: 2016, Victoria University of Wellington
URL: http://hdl.handle.net/10063/6225
► A primary goal of ecology is to identify the factors underlying recruitment variability, and how they may shape population dynamics. Recruitment is driven by the…
(more)
▼ A primary goal of ecology is to identify the factors underlying recruitment variability, and how they may shape
population dynamics. Recruitment is driven by the input of new individuals into a
population. However, these individuals often show high diversity in phenotypic traits and life histories, and the consequences of this variation are poorly understood. Phenotypic variation is widespread among the early life stages of fish, and this variation may be influenced by events occurring across multiple life stages. While many studies have investigated phenotypic variation and its effect on
population dynamics, comparatively few studies use an integrated approach that evaluates patterns and processes across multiple life history stages. Here I focus on a native amphidromous fish, Galaxias maculatus, and I explore patterns and consequences of phenotypic variation during larval stages, migratory stages, and post-settlement stages of this fish.
I explore variability in phenotypes and early life history traits of G. maculatus through both space and time. I use metrics derived from body size and otolith-based demographic reconstructions to quantify potentially important early life history traits. I found that cohorts of juvenile fish sampled later in the year were comprised of individuals that were older, smaller, and grew more slowly relative to fish sampled earlier in the year. I also found that two sampled sites (the Hutt River and the Wainuiomata River) showed different temporal trends, despite their close geographical proximity.
I then investigated whether phenotype was related to mortality. I used otolith-based traits to characterise larval ‘quality’ for individual fish. I then calculated the average larval quality for discrete cohorts of fish, and used catch-curve analysis to estimate mortality rates for these cohorts. I investigated the overall relationship between quality and mortality, and compared the trend between two sites. My results indicate that phenotype and mortality were not significantly correlated. However, this inference may be limited by low statistical power; the non-significant trends suggest that the relationship might be negative (i.e., larvae of higher quality tend to have lower rates of mortality). This trend is typical of systems where
population expansion is limited by food rather than predators.
I then investigated whether phenotypic traits in the juvenile cohorts were correlated with traits in adult cohorts. I resampled the focal populations ~6 months after sampling the juvenile stages (i.e., targeting fish from sampled cohorts that had survived to adulthood), and I used data from otoliths to reconstruct life history traits (hatch dates and growth histories). I compared adult life history traits to the traits of discrete juvenile cohorts.
My results suggest that fish that survived to adulthood had comparatively slower growth rates (reconstructed for a period of larval/juvenile growth) relative to the sampled juvenile cohorts (where growth rate was estimated for the same period in their…
Advisors/Committee Members: Shima, Jeffrey.
Subjects/Keywords: Otolith; Recruitment; Population dynamics
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APA (6th Edition):
Neilson, C. S. B. (2016). There and back again: Spatial and temporal variation in the recruitment dynamics of an amphidromous fish. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/6225
Chicago Manual of Style (16th Edition):
Neilson, Conor Stewart Bruce. “There and back again: Spatial and temporal variation in the recruitment dynamics of an amphidromous fish.” 2016. Masters Thesis, Victoria University of Wellington. Accessed March 28, 2020.
http://hdl.handle.net/10063/6225.
MLA Handbook (7th Edition):
Neilson, Conor Stewart Bruce. “There and back again: Spatial and temporal variation in the recruitment dynamics of an amphidromous fish.” 2016. Web. 28 Mar 2020.
Vancouver:
Neilson CSB. There and back again: Spatial and temporal variation in the recruitment dynamics of an amphidromous fish. [Internet] [Masters thesis]. Victoria University of Wellington; 2016. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/10063/6225.
Council of Science Editors:
Neilson CSB. There and back again: Spatial and temporal variation in the recruitment dynamics of an amphidromous fish. [Masters Thesis]. Victoria University of Wellington; 2016. Available from: http://hdl.handle.net/10063/6225
University of Tasmania
5.
Kuipers, MR.
Growth and reproduction of a short-lived cephalopod : mechanisms that facilitate population success in a highly variable environment.
Degree: 2012, University of Tasmania
URL: https://eprints.utas.edu.au/15927/2/whole-kuipers-2012.pdf
► For short-lived species seasonal fluctuations in environmental conditions plays a major part in shaping population structure and dynamics. Cephalopods are known for their short life…
(more)
▼ For short-lived species seasonal fluctuations in environmental conditions plays a major part in shaping population structure and dynamics. Cephalopods are known for their short life span, rapid growth, and early maturation. Small changes in environmental conditions have significant effects on life history characteristics, such as the timing and size at hatching, growth rates, longevity, and size and age at maturation. For cephalopods that live for less than a year annual environmental cues are not used to synchronise life events (e.g. timing of gametogenesis and spawning), instead individuals grow and reproduce throughout the majority of the year. As a result cephalopod populations are typically made up of multiple cohorts with differing life history characteristics, making it difficult to establish generalizations about the structure and dynamics of populations both within and among species. To date, both laboratory and field based studies have been useful in understanding some of the mechanisms responsible for the plastic characteristics that has allowed cephalopods to be so successful in response to the variable environmental conditions. The aim of this research was to use a small cephalopod species with a short life span, Euprymna tasmanica, to explore the relationships between growth and reproductive output from laboratory held populations alongside growth estimates from the field to explain some of the mechanisms that may be responsible for the seasonal variability found within populations of Euprymna tasmanica in northern Tasmania.
In captivity E. tasmanica hatched at approximately 0.3g and the percent increase in body mass per day followed a biphasic growth pattern, starting with a fast exponential growth model followed by slower almost linear growth. Changes in temperature and ration had significant impact on the growth and reproductive characteristics, however in most the influence of temperature and ration were independent of each other. During the initial stage of growth higher water temperature was seen to significantly increase the rate of growth, while greater rations increased growth during the late phase of growth. An elevation of temperature of 5°C over the entire lifespan decreased the age and weight at first egg deposition by 16 days, and 0.89g respectively, and halved the average egg size. Females fed at a greater ration were 12 days younger at first egg deposition and produced eggs that were on average 25% larger; however, their size at first batch deposition (6.23g ± 0.19) was no different from those females fed a smaller ration. Only the number of eggs in the batch was affected by the interaction of temperature and ration, with individuals experiencing a combination of high temperature and ration producing average batch sizes of around 128 eggs which was approximately twice the size of the other treatments.
Within the population of E. tasmanica sampled, it was apparent that the temperatures experienced had a significant effect on the growth, maturity and reproductive condition. Growth in…
Subjects/Keywords: cephalopod growth; reproduction; population dynamics
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APA (6th Edition):
Kuipers, M. (2012). Growth and reproduction of a short-lived cephalopod : mechanisms that facilitate population success in a highly variable environment. (Thesis). University of Tasmania. Retrieved from https://eprints.utas.edu.au/15927/2/whole-kuipers-2012.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kuipers, MR. “Growth and reproduction of a short-lived cephalopod : mechanisms that facilitate population success in a highly variable environment.” 2012. Thesis, University of Tasmania. Accessed March 28, 2020.
https://eprints.utas.edu.au/15927/2/whole-kuipers-2012.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kuipers, MR. “Growth and reproduction of a short-lived cephalopod : mechanisms that facilitate population success in a highly variable environment.” 2012. Web. 28 Mar 2020.
Vancouver:
Kuipers M. Growth and reproduction of a short-lived cephalopod : mechanisms that facilitate population success in a highly variable environment. [Internet] [Thesis]. University of Tasmania; 2012. [cited 2020 Mar 28].
Available from: https://eprints.utas.edu.au/15927/2/whole-kuipers-2012.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kuipers M. Growth and reproduction of a short-lived cephalopod : mechanisms that facilitate population success in a highly variable environment. [Thesis]. University of Tasmania; 2012. Available from: https://eprints.utas.edu.au/15927/2/whole-kuipers-2012.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Rice University
6.
Schultz, Emily.
Population dynamics in a changing world: the consequences of environmental variation for species with complex life histories.
Degree: PhD, Natural Sciences, 2019, Rice University
URL: http://hdl.handle.net/1911/105348
► Despite increasing awareness of the importance of environmental variation in ecological systems, there are still many open questions about how variation affects population dynamics. I…
(more)
▼ Despite increasing awareness of the importance of environmental variation in ecological systems, there are still many open questions about how variation affects
population dynamics. I studied several aspects of environmental variation and the roles it plays in
population dynamics, particularly for species with complex life histories. My first chapter addresses spatial variation in the effects of native insect herbivores on the
population dynamics of an invasive thistle, Cirsium vulgare. It shows that while the underlying
population dynamics of the thistle were predicted to vary substantially across space in the absence of herbivores, native insects were able to drive thistle populations to negative growth rates across the study region. My first chapter treats populations as isolated entities, with no dispersal between different populations. However, there is often dispersal between disjoint populations, creating metapopulations, isolated
population patches connected by dispersal. Therefore, my second chapter incorporates multiple populations and dispersal to test for the importance of within-patch heterogeneity for metapopulation persistence, using a whitebark pine metapopulation as a model. I found that for whitebark pine, within-patch heterogeneity had minimal effects on metapopulation, and the metapopulation was predicted to be stable with or without the observed within-patch heterogeneity. My final chapter also used the whitebark pine system to test for shifts in elevation distributions due to climate change. Whitebark pine populations were predicted to be buffered against climate change because they do not fill their climatically-determined fundamental niche, and they can therefore tolerate warmer and drier climates than they experience in their current range. Thus, environmental variation can play an important role in
population dynamics, but different sources of variation might be important at different scales of organization.
Advisors/Committee Members: Miller, Tom (advisor).
Subjects/Keywords: Population dynamics; Demography; Environmental variation
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APA ·
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APA (6th Edition):
Schultz, E. (2019). Population dynamics in a changing world: the consequences of environmental variation for species with complex life histories. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/105348
Chicago Manual of Style (16th Edition):
Schultz, Emily. “Population dynamics in a changing world: the consequences of environmental variation for species with complex life histories.” 2019. Doctoral Dissertation, Rice University. Accessed March 28, 2020.
http://hdl.handle.net/1911/105348.
MLA Handbook (7th Edition):
Schultz, Emily. “Population dynamics in a changing world: the consequences of environmental variation for species with complex life histories.” 2019. Web. 28 Mar 2020.
Vancouver:
Schultz E. Population dynamics in a changing world: the consequences of environmental variation for species with complex life histories. [Internet] [Doctoral dissertation]. Rice University; 2019. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/1911/105348.
Council of Science Editors:
Schultz E. Population dynamics in a changing world: the consequences of environmental variation for species with complex life histories. [Doctoral Dissertation]. Rice University; 2019. Available from: http://hdl.handle.net/1911/105348
University of Illinois – Urbana-Champaign
7.
Livesay, Michael Richard.
Stable configurations for population and social dynamics.
Degree: PhD, Mathematics, 2019, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/104735
► This dissertation investigates global and local minima in two models: the Lotka – Volterra model for population dynamics and a tractable polarized opinion social dynamic model.…
(more)
▼ This dissertation investigates global and local minima in two models: the Lotka – Volterra model for
population dynamics and a tractable polarized opinion social dynamic model.
This dissertation contains stability results of the Lotka – Volterra model when induced by a cycle graph food web network. Results such as orbits, chaos and the probability of stability are given. A result showing convexity of the weighted connections of the food web is sufficient for global stability is given as well. Stability results of food webs which are perturbed from the cycle graph are explored as well for comparison.
This dissertation goes on to investigate how algebraic relationships within the community matrix predict stability for the generalized Lotka – Volterra model. In particular, it is shown that there is a strong relationship between the transversal eigenvalues with respect to a subset of the species in a system and the Schur compliment of the Jacobian at the interior fixed point with the submatrix determined by the same subset of species. This relationship gives an alternate proof to many well known results.
This dissertation also analyzes the global and local stability of an opinion dynamic model which consists of a W-well potential and a graph Laplacian for coupling. The global minimizers and their lack of confinement to an orthant are investigated. The number of local minimizers are also investigated for various W-well potentials. This dissertation investigates the different types of bifurcations that can be seen depending on the differential properties of the W-potentials.
Advisors/Committee Members: DeVille, Lee (advisor), Bronski, Jared (Committee Chair), Rapti, Zoi (committee member), Zharnitsky, Vadim (committee member).
Subjects/Keywords: population dynamics; opinion dynamics; local stability
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APA (6th Edition):
Livesay, M. R. (2019). Stable configurations for population and social dynamics. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/104735
Chicago Manual of Style (16th Edition):
Livesay, Michael Richard. “Stable configurations for population and social dynamics.” 2019. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed March 28, 2020.
http://hdl.handle.net/2142/104735.
MLA Handbook (7th Edition):
Livesay, Michael Richard. “Stable configurations for population and social dynamics.” 2019. Web. 28 Mar 2020.
Vancouver:
Livesay MR. Stable configurations for population and social dynamics. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2019. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/2142/104735.
Council of Science Editors:
Livesay MR. Stable configurations for population and social dynamics. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2019. Available from: http://hdl.handle.net/2142/104735
Montana Tech
8.
Ellis, Martha.
Transient dynamics in plant population models.
Degree: PhD, 2013, Montana Tech
URL: https://scholarworks.umt.edu/etd/1138
► Transient dynamics describe short-term responses to unstable conditions in population models. Although the theoretical potential of these short-term effects to change interpretation of model behavior…
(more)
▼ Transient dynamics describe short-term responses to unstable conditions in population models. Although the theoretical potential of these short-term effects to change interpretation of model behavior has been demonstrated, it is unclear whether transient analyses will be relevant or useful in management applications. This dissertation explores the role of transient dynamics in plant populations based on long-term demographic data.
Based on a survey of modeling results for plant populations in the literature, I found that theoretical indices of transient behavior greatly overemphasized the role of transient responses for the populations for which data were available. Transient indices were indicative of the variation in distance from asymptotic conditions that the models experienced; however, empirical data on long-term environmental variability was substantially closer to asymptotic conditions than theoretical measures.
However, transient responses do play an important role in the variability that populations experience. Across nine perennial plant species, transient responses contributed more on average to variability in annual population growth rates than variation in vital rates alone. I also found evidence that transient responses may at times have a buffering effect on the variation that populations experience, by pushing the population in the opposite direction as demographic variation. These results demonstrate the importance of viewing transient dynamics and demographic variation as interrelated processes, with implications for both understanding population dynamics and in management applications.
Finally, I explored the role of transient dynamics to assess the non-target impacts of herbicide use on population dynamics of Balsamorhiza sagittata, a native perennial forb in Montana grasslands. Using long-term monitoring data, I found that stage-specific effects of herbicide on Balsamroot demography, combined with episodic recruitment, lead to highly variable population demographic structures during the 10 year study period. My analyses suggest that timing herbicide use based on current population stage structures and mitigating changes to stage structure after spraying could help to minimize long-term impacts of herbicide use on long-lived perennial forbs like Balsamroot. More generally, my analysis demonstrated how information on current population status and specific timescales can be used to better inform management.
Subjects/Keywords: conservation; matrix population models; plant population dynamics; transient dynamics
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APA ·
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APA (6th Edition):
Ellis, M. (2013). Transient dynamics in plant population models. (Doctoral Dissertation). Montana Tech. Retrieved from https://scholarworks.umt.edu/etd/1138
Chicago Manual of Style (16th Edition):
Ellis, Martha. “Transient dynamics in plant population models.” 2013. Doctoral Dissertation, Montana Tech. Accessed March 28, 2020.
https://scholarworks.umt.edu/etd/1138.
MLA Handbook (7th Edition):
Ellis, Martha. “Transient dynamics in plant population models.” 2013. Web. 28 Mar 2020.
Vancouver:
Ellis M. Transient dynamics in plant population models. [Internet] [Doctoral dissertation]. Montana Tech; 2013. [cited 2020 Mar 28].
Available from: https://scholarworks.umt.edu/etd/1138.
Council of Science Editors:
Ellis M. Transient dynamics in plant population models. [Doctoral Dissertation]. Montana Tech; 2013. Available from: https://scholarworks.umt.edu/etd/1138
Dalhousie University
9.
Campbell, Véronik.
Dynamics of Species Extinction and Recovery in Multi-Trophic
Aquatic Systems.
Degree: MS, Department of Biology, 2010, Dalhousie University
URL: http://hdl.handle.net/10222/13106
► The current rate of species extinction is higher than at any other time in Earth’s history. Despite our understanding of the causes and consequences of…
(more)
▼ The current rate of species extinction is higher than
at any other time in Earth’s history. Despite our understanding of
the causes and consequences of extinction and the development of
numerous species conservation plans, it is surprising how little we
know about the
dynamics of extinction and recovery. Here, I explore
the
dynamics of
population extinction and recovery across a range
of meio-invertebrate species embedded in aquatic multi-trophic
communities under external pressure. My results indicate that
external mortality frequency has a negative impact on the
dynamics
of
population extinction and recovery and suggest that it may be
possible to predict patterns of
population extinction from patterns
of
population growth as well as patterns of recovery from patterns
of
population collapse. My findings provide a valuable empirical
basis from which we may increase our understanding of the factors
influencing extinction risk and recovery potential to develop
sustainable management strategies.
Advisors/Committee Members: Diane Srivastava (external-examiner), Hal Whitehead (graduate-coordinator), Sina Adl (thesis-reader), Sandra Walde (thesis-reader), Boris Worm (thesis-reader), Tamara Romanuk (thesis-supervisor), Not Applicable (ethics-approval), Not Applicable (manuscripts), Not Applicable (copyright-release).
Subjects/Keywords: Extinction; recovery; population dynamics; collapse;
extinction dynamics; recovery dynamics; zooplankton;
microcosm
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APA (6th Edition):
Campbell, V. (2010). Dynamics of Species Extinction and Recovery in Multi-Trophic
Aquatic Systems. (Masters Thesis). Dalhousie University. Retrieved from http://hdl.handle.net/10222/13106
Chicago Manual of Style (16th Edition):
Campbell, Véronik. “Dynamics of Species Extinction and Recovery in Multi-Trophic
Aquatic Systems.” 2010. Masters Thesis, Dalhousie University. Accessed March 28, 2020.
http://hdl.handle.net/10222/13106.
MLA Handbook (7th Edition):
Campbell, Véronik. “Dynamics of Species Extinction and Recovery in Multi-Trophic
Aquatic Systems.” 2010. Web. 28 Mar 2020.
Vancouver:
Campbell V. Dynamics of Species Extinction and Recovery in Multi-Trophic
Aquatic Systems. [Internet] [Masters thesis]. Dalhousie University; 2010. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/10222/13106.
Council of Science Editors:
Campbell V. Dynamics of Species Extinction and Recovery in Multi-Trophic
Aquatic Systems. [Masters Thesis]. Dalhousie University; 2010. Available from: http://hdl.handle.net/10222/13106
Texas A&M University
10.
Reyna, Kelly Shane.
The Texas Quail Index: Evaluating Predictors of Quail Abundance Using Citizen Science.
Degree: 2009, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-3090
► Annual abundance of northern bobwhite (Colinus virginianus) and scaled quail (Callipepla squamata) fluctuates drastically in Texas, which complicates a quail manager?s ability to forecast quail…
(more)
▼ Annual abundance of northern bobwhite (Colinus virginianus) and scaled quail
(Callipepla squamata) fluctuates drastically in Texas, which complicates a quail
manager?s ability to forecast quail abundance for the ensuing hunting season. The Texas
Quail Index (TQI) was a 5-year citizen-science project that evaluated several indices of
quail abundance and habitat parameters as predictors of quail abundance during the
ensuing fall. I found that spring cock-call counts explained 41% of the variation in fall
covey-call counts for all study sites in year 1?4, and 89% of the variation in year 5.
Further investigation revealed that year 5 was a drought year and had a significantly
lower percentage of juveniles in the hunter?s bag. These results suggest that during
drought years, fall quail abundance is more predictable than during non-drought years
and that low breeding success may be the reason. If these data are correct, quail
managers should have a better ability to predict the declines of their fall quail abundance
in the dry years.
The TQI relied on citizen scientists (cooperators) to collect data. Since most
(66.1%) cooperators dropped out of the program, and <8% of all data sets were complete, I surveyed the cooperators by mail to determine the rate and cause of
cooperator decline and to identify characteristics of a reliable cooperator (i.e., one that
did not drop out of the study). I found that cooperator participation declined earlier each
year for year 1?4, and that year 5 demonstrated a steady trend with the least amount of
cooperators. Most respondents who dropped out (61.5%) reported their motive for
leaving was that it was too time consuming. I found no difference in mean cooperator
demographics, satisfaction, or landownership goals between those respondents who
dropped out and those that did not. However, 38% of those who dropped out were not
completely satisfied with communication from TQI coordinators compared to only 15%
of those who did not drop out, indicating that communication, or perhaps overall
volunteer management, might have been improved. Future studies should maintain
better communication with participants, require less time, and provide an incentive for
retention.
Advisors/Committee Members: Morrison, Michael (advisor), Rollins, Dale (advisor), Kreuter, Urs (committee member), Ransom, Dean (committee member).
Subjects/Keywords: Northern bobwhite; bobwhite; quail; abundance; population dynamics
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MLA ·
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APA (6th Edition):
Reyna, K. S. (2009). The Texas Quail Index: Evaluating Predictors of Quail Abundance Using Citizen Science. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-3090
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Reyna, Kelly Shane. “The Texas Quail Index: Evaluating Predictors of Quail Abundance Using Citizen Science.” 2009. Thesis, Texas A&M University. Accessed March 28, 2020.
http://hdl.handle.net/1969.1/ETD-TAMU-3090.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Reyna, Kelly Shane. “The Texas Quail Index: Evaluating Predictors of Quail Abundance Using Citizen Science.” 2009. Web. 28 Mar 2020.
Vancouver:
Reyna KS. The Texas Quail Index: Evaluating Predictors of Quail Abundance Using Citizen Science. [Internet] [Thesis]. Texas A&M University; 2009. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-3090.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Reyna KS. The Texas Quail Index: Evaluating Predictors of Quail Abundance Using Citizen Science. [Thesis]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-3090
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Aberdeen
11.
Cordes, Line Søltoft.
Demography and breeding phenology of a marine top predator.
Degree: 2011, University of Aberdeen
URL: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=183669
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.554390
► Worldwide harbour seal populations are showing differing and fluctuating trends in abundance, but the drivers of change remain uncertain. Within the Moray Firth, NE Scotland,…
(more)
▼ Worldwide harbour seal populations are showing differing and fluctuating trends in abundance, but the drivers of change remain uncertain. Within the Moray Firth, NE Scotland, count surveys carried out over the last 20 years highlighted the development of a new breeding site, providing a unique opportunity to carry out an individual-based study of harbour seal demography and pupping phenology using photo-identification techniques within a mark-recapture framework. Sightings of individual seals suggested that a large proportion of harbour seals are year-round residents at haul-out sites. Both sexes displayed high levels of between-year breeding site fidelity as well as seasonal variation in their haul-out behaviour. Apparent sex-specific survival rates (0.89♂, 0.97♀) and birth rates (0.88) were high. There was a strong correlation between lactation durations and the timing of pupping, suggesting that shifts in pupping phenology are a result of energetic constraints. This highlights the potential for using the timing of pupping as an indicator of ecosystem conditions. This study provided the first concurrent real-time estimates of survival and fecundity in a naturally regulated population of harbour seals. Demographic parameters and physiological responses indicate that prevailing conditions within the Moray Firth are favourable, and that this population should be recovering. However, observed patterns may also be an artefact of the long-term decline having caused an increase in per capita food availability through the reduction in intra-specific competition. This study highlights the current and long-term importance of individual-based data in understanding population dynamics. Through the identification of sentinel sites around the world, harbour seals could provide a single-species indicator of coastal ecosystem conditions in the Northern Hemisphere.
Subjects/Keywords: 599.79; Harbor seal : Seals (Animals) : Population dynamics
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APA (6th Edition):
Cordes, L. S. (2011). Demography and breeding phenology of a marine top predator. (Doctoral Dissertation). University of Aberdeen. Retrieved from http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=183669 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.554390
Chicago Manual of Style (16th Edition):
Cordes, Line Søltoft. “Demography and breeding phenology of a marine top predator.” 2011. Doctoral Dissertation, University of Aberdeen. Accessed March 28, 2020.
http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=183669 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.554390.
MLA Handbook (7th Edition):
Cordes, Line Søltoft. “Demography and breeding phenology of a marine top predator.” 2011. Web. 28 Mar 2020.
Vancouver:
Cordes LS. Demography and breeding phenology of a marine top predator. [Internet] [Doctoral dissertation]. University of Aberdeen; 2011. [cited 2020 Mar 28].
Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=183669 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.554390.
Council of Science Editors:
Cordes LS. Demography and breeding phenology of a marine top predator. [Doctoral Dissertation]. University of Aberdeen; 2011. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=183669 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.554390
University of South Carolina
12.
Hounchell, Katrina C.
Determining the Population Dynamics and Reproductive Life History of Commercially Important Tunas in the Gulf of Mexico.
Degree: MS, Biological Sciences, 2017, University of South Carolina
URL: https://scholarcommons.sc.edu/etd/4336
► The Gulf of Mexico (GOM) is an important spawning ground for many commercially important fish species including yellowfin, skipjack, and blackfin tunas. In particular,…
(more)
▼ The Gulf of Mexico (GOM) is an important spawning ground for many commercially important fish species including yellowfin, skipjack, and blackfin tunas. In particular, it is an essential spawning habitat for Atlantic bluefin tuna, whose stock status is of great international concern. It is vital to the appropriate conservation management of these species to determine both the location of their spawning grounds and the genetic diversity found within them. Fish eggs are a fisheries-independent source of spawning information that can provide more accurate estimates of spawning sites compared to larvae. This study describes
population diversity and reproductive life histories in Thunnus and Katsuwonus using fish eggs that were collected during the National Marine Fisheries Service’s (NMFS) 2011 spring larval survey in the northern Gulf of Mexico. Of 12,731 eggs surveyed genetically from 121 different sites, 38 Thunnus thynnus, 49 Thunnus albacares, 192 Thunnus atlanticus, and 15 Katsuwonus pelamis were identified. T.thynnus and K.pelamis had very high haplotypic diversity (h=.995 and h=.946, respectively), while T.albacares and T.atlanticus had relatively lower haplotypic diversity (h=.288 and h=.454). Phylogenetic and molecular diversity analyses for each species revealed that bluefin and skipjack tunas display aggregate spawning at relatively few sites, while yellowfin and blackfin individuals spawn independently at multiple sites. All species were found throughout the GOM apart from bluefin tuna which was only identified along the northern-most edge of the GOM within the continental shelf and slope.
Advisors/Committee Members: Joseph Quattro.
Subjects/Keywords: Biology; Life Sciences; Population Dynamics; Tunas
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Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hounchell, K. C. (2017). Determining the Population Dynamics and Reproductive Life History of Commercially Important Tunas in the Gulf of Mexico. (Masters Thesis). University of South Carolina. Retrieved from https://scholarcommons.sc.edu/etd/4336
Chicago Manual of Style (16th Edition):
Hounchell, Katrina C. “Determining the Population Dynamics and Reproductive Life History of Commercially Important Tunas in the Gulf of Mexico.” 2017. Masters Thesis, University of South Carolina. Accessed March 28, 2020.
https://scholarcommons.sc.edu/etd/4336.
MLA Handbook (7th Edition):
Hounchell, Katrina C. “Determining the Population Dynamics and Reproductive Life History of Commercially Important Tunas in the Gulf of Mexico.” 2017. Web. 28 Mar 2020.
Vancouver:
Hounchell KC. Determining the Population Dynamics and Reproductive Life History of Commercially Important Tunas in the Gulf of Mexico. [Internet] [Masters thesis]. University of South Carolina; 2017. [cited 2020 Mar 28].
Available from: https://scholarcommons.sc.edu/etd/4336.
Council of Science Editors:
Hounchell KC. Determining the Population Dynamics and Reproductive Life History of Commercially Important Tunas in the Gulf of Mexico. [Masters Thesis]. University of South Carolina; 2017. Available from: https://scholarcommons.sc.edu/etd/4336
Penn State University
13.
Fuller, Zach.
Uncovering the Dynamics of Natural Populations: Genomic Studies in Drosophila pseudoobscura & Apis mellifera.
Degree: 2017, Penn State University
URL: https://etda.libraries.psu.edu/catalog/13758zlf105
► Genetic variation can exist in a number of forms, ranging from single nucleotide changes falling in regions with no impact on fitness to large-scale structural…
(more)
▼ Genetic variation can exist in a number of forms, ranging from single nucleotide changes falling in regions with no impact on fitness to large-scale structural rearrangements of chromosomes. A variety of evolutionary forces, including selection, mutation, recombination and drift, shape the structure of this genetic variation and the resulting molecular pattern can be used to infer the evolutionary
dynamics of natural populations. Questions regarding the origin and maintenance of genetic traits in natural populations have historically been a central focus to the field of evolutionary biology. Traditionally however, researchers have been limited by the amount, breadth and resolution of genetic data available to address theoretical models of how variation is expected to change over time. Recent advances in high throughput sequencing technologies yield a powerful method to inexpensively generate sequence data across entire genomes, yet at the resolution of individual nucleotides. Here, a high throughput sequencing approach is used to investigate genetic variation in the model organism Drosophila pseudoobscura and the non-model organism Apis mellifera. In this work, I find that stabilizing selection acts on synonymous codon usage and shapes the nucleotide composition of gens in D. pseudoobscura. Furthermore, I develop a series of publically available tools to perform tests of positive selection in A. mellifera and identify several genes with signatures of adaptive evolution. Additionally, I demonstrate chromosomal inversions in D. pseudoobscura are likely favored because of their indirect effect of suppressed recombination. Lastly, I suggest a novel role for segregation distortion in the process of speciation and find evidence for cross-species introgression enabled by an association with a selfish genetic element. Together, this work reveals the complex interaction of different evolutionary forces that influence the structure of genetic variation across genomes and populations.
Advisors/Committee Members: Stephen Schaeffer, Dissertation Advisor.
Subjects/Keywords: Genomics; drosophila; apis mellifera; selection; population dynamics
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APA ·
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Manager
APA (6th Edition):
Fuller, Z. (2017). Uncovering the Dynamics of Natural Populations: Genomic Studies in Drosophila pseudoobscura & Apis mellifera. (Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/13758zlf105
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fuller, Zach. “Uncovering the Dynamics of Natural Populations: Genomic Studies in Drosophila pseudoobscura & Apis mellifera.” 2017. Thesis, Penn State University. Accessed March 28, 2020.
https://etda.libraries.psu.edu/catalog/13758zlf105.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fuller, Zach. “Uncovering the Dynamics of Natural Populations: Genomic Studies in Drosophila pseudoobscura & Apis mellifera.” 2017. Web. 28 Mar 2020.
Vancouver:
Fuller Z. Uncovering the Dynamics of Natural Populations: Genomic Studies in Drosophila pseudoobscura & Apis mellifera. [Internet] [Thesis]. Penn State University; 2017. [cited 2020 Mar 28].
Available from: https://etda.libraries.psu.edu/catalog/13758zlf105.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fuller Z. Uncovering the Dynamics of Natural Populations: Genomic Studies in Drosophila pseudoobscura & Apis mellifera. [Thesis]. Penn State University; 2017. Available from: https://etda.libraries.psu.edu/catalog/13758zlf105
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Sydney
14.
Chan, Matthew Ho Tong.
Mathematical modelling of dispersal and evolution of life-history traits in biological populations
.
Degree: 2016, University of Sydney
URL: http://hdl.handle.net/2123/14870
► This thesis explores the role of intraspecific variation in a population and how this can affect the overall population dynamics. In particular, we have focused…
(more)
▼ This thesis explores the role of intraspecific variation in a population and how this can affect the overall population dynamics. In particular, we have focused on population dispersal, the evolution of life-history traits and the interface between these two aspects. Through the use of mathematical modelling, we show how intraspecific variation is important to consider for an accurate description of the qualitative and quantitative dynamics of a population. Although intraspecific variation and interaction are widely accepted as being important components affecting the growth of a population, it is only recently that there has been an emphasis on individual heterogeneities affecting dispersal, in most part due to the increasing threat of biological invasions, spread of vector-borne diseases, extinction of heavily harvested populations and the fragmentation of habitats due to climate change. Moreover, although the ecological literature on life-history characteristics, their associated tradeoffs and their evolutionary consequences has a long history, the evolutionary consequences resulting from the interplay of life-history trade-offs are not so clear. The reverse is also true, for an observed qualitative behaviour, it is usually not clear what trade-offs are responsible. This is still the case for many fundamental questions in evolutionary biology, such as "Why do we grow old?", "Why does altruistic behaviour exist?" or "Why do human females regularly live past menopause while chimpanzees do not?". Chapters 2 and 3 examine the role of individual heterogeneity in a population and its effects on the persistence and spread rate of a population. Chapter 4 analyses the stability properties of the solution for the model in Chapter 3. Chapters 5 and 6 examine the evolutionary processes associated with dispersal by including the evolution of a trait that is linked with dispersal and life-history characteristics. Lastly, in Chapter 7 we solely examine the evolution of life-history traits and the evolutionary consequences. Since the inclusion of continuous space or a continuum of heritable trait values acts as an extra dimension, we have used partial differential equations to model the populations being considered in each chapter, with the exception of Chapter 2.
Subjects/Keywords: Mathematical biology;
Population dynamics;
Evolutionary dymanics
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APA (6th Edition):
Chan, M. H. T. (2016). Mathematical modelling of dispersal and evolution of life-history traits in biological populations
. (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/14870
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chan, Matthew Ho Tong. “Mathematical modelling of dispersal and evolution of life-history traits in biological populations
.” 2016. Thesis, University of Sydney. Accessed March 28, 2020.
http://hdl.handle.net/2123/14870.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chan, Matthew Ho Tong. “Mathematical modelling of dispersal and evolution of life-history traits in biological populations
.” 2016. Web. 28 Mar 2020.
Vancouver:
Chan MHT. Mathematical modelling of dispersal and evolution of life-history traits in biological populations
. [Internet] [Thesis]. University of Sydney; 2016. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/2123/14870.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chan MHT. Mathematical modelling of dispersal and evolution of life-history traits in biological populations
. [Thesis]. University of Sydney; 2016. Available from: http://hdl.handle.net/2123/14870
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Mississippi State University
15.
Shamaskin, Andrew Challen.
Evaluating multisystem length limits for inland fisheries.
Degree: MS, Wildlife, Fisheries & Aquaculture, 2018, Mississippi State University
URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-03162018-144239/
;
► Multisystem length limits are a popular output control implemented to regulate harvest of many gamefishes. Evaluating the direct effects of length limits is crucial in…
(more)
▼ Multisystem length limits are a popular output control implemented to regulate harvest of many gamefishes. Evaluating the direct effects of length limits is crucial in selecting a regulation, but to my knowledge, no formal methodology exists to model length limits for multiple systems. Without a formalized process, complexities associated with multisystem scales of management can preclude effective communication and interpretation of information. I created a quantitative decision model as an approach for comparing length limits applied to multiple systems. This approach combined an extension of the Beverton-Holt yield-per-recruit function and an additive utility function to compare multisystem length limits. I also conducted a sensitivity analyses to clarify the effect of input parameters and uncertainty on the expected utility, and on performance metrics. This approach provides a consistent methodology for evaluating multisystem length limits, and as a decision support tool, can improve transparency of the length-limit-selection process.
Advisors/Committee Members: Michael E. Colvin (chair), Leandro E. Miranda (chair), J. Wesley Neal (committee member).
Subjects/Keywords: decision analysis; fisheries management; population dynamics
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APA ·
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APA (6th Edition):
Shamaskin, A. C. (2018). Evaluating multisystem length limits for inland fisheries. (Masters Thesis). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-03162018-144239/ ;
Chicago Manual of Style (16th Edition):
Shamaskin, Andrew Challen. “Evaluating multisystem length limits for inland fisheries.” 2018. Masters Thesis, Mississippi State University. Accessed March 28, 2020.
http://sun.library.msstate.edu/ETD-db/theses/available/etd-03162018-144239/ ;.
MLA Handbook (7th Edition):
Shamaskin, Andrew Challen. “Evaluating multisystem length limits for inland fisheries.” 2018. Web. 28 Mar 2020.
Vancouver:
Shamaskin AC. Evaluating multisystem length limits for inland fisheries. [Internet] [Masters thesis]. Mississippi State University; 2018. [cited 2020 Mar 28].
Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-03162018-144239/ ;.
Council of Science Editors:
Shamaskin AC. Evaluating multisystem length limits for inland fisheries. [Masters Thesis]. Mississippi State University; 2018. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-03162018-144239/ ;
Virginia Tech
16.
Mowlaei, Shahir.
Mean Field Analysis of Generalized Cyclic Competitions.
Degree: PhD, Physics, 2015, Virginia Tech
URL: http://hdl.handle.net/10919/52962
► The mean field analysis of stochastic dynamical system allows us to gain insight into the qualitative features of their complex behavior, as well as quantitative…
(more)
▼ The mean field analysis of stochastic dynamical system allows us to gain insight into the qualitative features of their complex behavior, as well as quantitative estimates of certain aspects of their coarse-grained properties. As such, it usually furnishes a first front in approaching new dynamical systems and informs us about their stability landscape in the absence of fluctuations among other things. A knowledge of this landscape can be a valuable tool in model building for describing real world systems and provides a guiding principle for a justifiable choice of form and model parameters.
In this work, we contribute to this analysis for two generic classes of high-dimensional models that possess a cyclic symmetry in the network that specifies their stochastic
dynamics at the microscopic level. Our analysis is carried out in a manner that can be readily adapted for the mean field analysis of further generalized models that possess this symmetry. Moreover, in the second class of these models, we propose a new basic process that can change the stability landscape of an existing model and, as such, endow us with potential alternatives to model systems with robust biodiverse regimes.
Advisors/Committee Members: Pleimling, Michel Jean (committeechair), Eubank, Stephen G. (committeechair), Tauber, Uwe C. (committee member), Huber, Patrick (committee member), Sharpe, Eric R. (committee member).
Subjects/Keywords: Population Dynamics; Mean Field; Cyclic Competition
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Manager
APA (6th Edition):
Mowlaei, S. (2015). Mean Field Analysis of Generalized Cyclic Competitions. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/52962
Chicago Manual of Style (16th Edition):
Mowlaei, Shahir. “Mean Field Analysis of Generalized Cyclic Competitions.” 2015. Doctoral Dissertation, Virginia Tech. Accessed March 28, 2020.
http://hdl.handle.net/10919/52962.
MLA Handbook (7th Edition):
Mowlaei, Shahir. “Mean Field Analysis of Generalized Cyclic Competitions.” 2015. Web. 28 Mar 2020.
Vancouver:
Mowlaei S. Mean Field Analysis of Generalized Cyclic Competitions. [Internet] [Doctoral dissertation]. Virginia Tech; 2015. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/10919/52962.
Council of Science Editors:
Mowlaei S. Mean Field Analysis of Generalized Cyclic Competitions. [Doctoral Dissertation]. Virginia Tech; 2015. Available from: http://hdl.handle.net/10919/52962
McMaster University
17.
Szymkiewicz, Rachelle.
Pseudomonas aeruginosa Prairie Epidemic Strain Population Dynamics and Evolution of Disease in Cystic Fibrosis Airways of Adult Patients.
Degree: MSc, 2018, McMaster University
URL: http://hdl.handle.net/11375/24279
► The lower airways of patients with chronic airway diseases including cystic fibrosis (CF) are colonized by diverse communities of microorganisms. Over-time the airways of some…
(more)
▼ The lower airways of patients with chronic airway diseases including cystic fibrosis
(CF) are colonized by diverse communities of microorganisms. Over-time the
airways of some 60% of CF patients become permanently colonized and dominated
by Pseudomonas aeruginosa. Chronic infection of P. aeruginosa has been
associated with a decline in pulmonary function, worse prognosis, and eventual
patient mortality. Although P. aeruginosa evolves within the CF airways resulting
in complex populations, the mechanism by which these complex populations
contribute to disease progression is not well understood. Here we show diversity
among isolates by observed changes in genome sequences of a strain of
P. aeruginosa, known as Prairie Epidemic Strain (PES). Using whole genome
sequencing and comparative genomics we identified a large core genome across
195 PES isolates from 57 CF patients of the Calgary Adult Cystic Fibrosis Clinic
(CACFC) where 88% of the pangenome was categorized as core genes. Single
nucleotide polymorphism (SNPs) mutations were shown to be the largest
contributor of diversity at the nucleotide level compared to other polymorphism
types consisting of 87% of the total polymorphisms present across the 195 PES
isolates. CRISPR arrays and mobile elements such as prophage and plasmids
demonstrate this strain of P. aeruginosa was stable over 30 years. In a second
aim, I show variation in the populations of P. aeruginosa across an exacerbation
event further highlighting the complexity of the lung bacterial community. Distinct
populations of P. aeruginosa at the onset and resolution of an exacerbation within
a single CF patient were identified by SNPs. These results a model where adaptive
radiation as well as natural mutations contribute to the heterogeneity and
diversification within populations of P. aeruginosa in CF patients. Understanding
the evolution and population structure of PES through the identification of
important genes and mutations through the clinical course of an exacerbation can
aid in identifying new targets for patient treatment of P. aeruginosa in CF.
Thesis
Master of Science (MSc)
Cystic fibrosis is a life-threatening disease characterized by cycles of stability and
respiratory illness. Bacterial species within the lungs of these patients are the main
contributor to disease progression. I investigated a specific transmissible epidemic
strain, Pseudomonas aeruginosa Prairie Epidemic Strain, using a unique collection
of samples provided by collaborators at the adult cystic fibrosis clinic in Calgary.
Using these samples, I first explored the differences between patients over a period
of 34 years. I hypothesized that similar changes in genome sequences will be
observed in multiple patients with a possible commonality in disease progression.
Second, I explored the role this bacterial pathogen may play in cycles of respiratory
illness. I hypothesize that a specific bacterial subpopulation could initiate these
cycles and be identified by changes at the genome…
Advisors/Committee Members: Surette, Michael, Biochemistry and Biomedical Sciences.
Subjects/Keywords: Cystic Fibrosis; Comparative genomics; Population dynamics
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APA (6th Edition):
Szymkiewicz, R. (2018). Pseudomonas aeruginosa Prairie Epidemic Strain Population Dynamics and Evolution of Disease in Cystic Fibrosis Airways of Adult Patients. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/24279
Chicago Manual of Style (16th Edition):
Szymkiewicz, Rachelle. “Pseudomonas aeruginosa Prairie Epidemic Strain Population Dynamics and Evolution of Disease in Cystic Fibrosis Airways of Adult Patients.” 2018. Masters Thesis, McMaster University. Accessed March 28, 2020.
http://hdl.handle.net/11375/24279.
MLA Handbook (7th Edition):
Szymkiewicz, Rachelle. “Pseudomonas aeruginosa Prairie Epidemic Strain Population Dynamics and Evolution of Disease in Cystic Fibrosis Airways of Adult Patients.” 2018. Web. 28 Mar 2020.
Vancouver:
Szymkiewicz R. Pseudomonas aeruginosa Prairie Epidemic Strain Population Dynamics and Evolution of Disease in Cystic Fibrosis Airways of Adult Patients. [Internet] [Masters thesis]. McMaster University; 2018. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/11375/24279.
Council of Science Editors:
Szymkiewicz R. Pseudomonas aeruginosa Prairie Epidemic Strain Population Dynamics and Evolution of Disease in Cystic Fibrosis Airways of Adult Patients. [Masters Thesis]. McMaster University; 2018. Available from: http://hdl.handle.net/11375/24279
Univerzitet u Beogradu
18.
Jaćimović, Milica Lj., 1982-.
Populaciona dinamika i ekotoksikologija crnog američkog
patuljastog soma (Ameiurus melas Rafinesque, 1820) u Savskom
jezeru.
Degree: Biološki fakultet, 2016, Univerzitet u Beogradu
URL: https://fedorabg.bg.ac.rs/fedora/get/o:10958/bdef:Content/get
► Ekologija - Ekologija riba / Ecology - Fish Ecology
Crni američki patuljasti som (Ameiurus melas Rafinesque, 1820) je najzastupljenija i najuspešnija alohtona vrsta ribe koja…
(more)
▼ Ekologija - Ekologija riba / Ecology - Fish
Ecology
Crni američki patuljasti som (Ameiurus melas
Rafinesque, 1820) je najzastupljenija i najuspešnija alohtona vrsta
ribe koja naseljava kopnene vode Evrope. Istraživanja koja su
sprovedena u proteklih nekoliko godina ukazuju na to da je ovo
dominantna invazivna vrsta i u mnogim kopnenim vodama u Srbiji.
Cilj istraživanja se odnosio na ispitivanje populacionih atributa
patuljastog soma u Savskom jezeru, kao i na bioakumulaciju teških
metala i mikroelemenata u različitim tkivima. Terenska istraživanja
vršena su u periodu od 2009. do 2012. godine. Jedinke su uzorkovane
jednom mesečno, četiri dana za redom. Laboratorijska obrada
prikupljenih uzoraka obuhvatila je merenje totalne dužine tela (TL)
i ukupne težine tela ulovljenih primeraka. Nakon disekcije jedinki
merena je težina tela bez utrobe, kao i masa jetre i
gonada.Struktura populacije utvrđena je kombinovanjem dve metode –
analizom starosti jedinki i analizom dužinskih frekvencija. Starost
jedinki određena je takođe uz pomoć dve metode – očitavanjem
naraštajnih zona otolita i Batačarija metodom. Analiza uzrasne
strukture populacije pokazala je prisustvo pet uzrasnih kategorija:
od 0+ do 4+. Klasa 1+ bila je najdominatnija uzrasna klasa, kako po
godinama, tako i po sezonama uzorkovanja. Prosečna totalna dužina
jedinki iznosila je 13,3 cm, a prosečna težina 38,26 g. Prosečna
relativna težina jedinki u Savskom jezeru, u celokupnom uzorku,
iznosila je 84,78 ± 1,09 g. Utvrđeno je prisustvo ukupno 8 kohorti.
Na osnovu analize dužinsko-težinskih odnosa izračunate su i
vrednosti faktora alometrije b koje su se kretale od 2,93 do 3,16,
dok je vrednost ovog faktora u celom poduzorku iznosila 3,00.
Analizom krive dužinsko-težinskog odnosa utvrđeno je da tačka
infleksije ne postoji. Ribolovni napor (CPUE) je korišćen za
analizu distribucije i relativne gustine jedinki, kako po
staništima, tako i po godinama uzorkovanja i sezonama. Tokom 2009,
2010. i 2012. godine CPUE vrednosti varirale su od 0,4 ± 0,5 do
41,5 ± 22,1 jedinki po vrši po danu...
Advisors/Committee Members: Krpo-Ćetković, Jasmina, 1961-.
Subjects/Keywords: black bullhead; population dynamics; ecotoxicology;
Sava Lake
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Jaćimović, Milica Lj., 1. (2016). Populaciona dinamika i ekotoksikologija crnog američkog
patuljastog soma (Ameiurus melas Rafinesque, 1820) u Savskom
jezeru. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:10958/bdef:Content/get
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Jaćimović, Milica Lj., 1982-. “Populaciona dinamika i ekotoksikologija crnog američkog
patuljastog soma (Ameiurus melas Rafinesque, 1820) u Savskom
jezeru.” 2016. Thesis, Univerzitet u Beogradu. Accessed March 28, 2020.
https://fedorabg.bg.ac.rs/fedora/get/o:10958/bdef:Content/get.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Jaćimović, Milica Lj., 1982-. “Populaciona dinamika i ekotoksikologija crnog američkog
patuljastog soma (Ameiurus melas Rafinesque, 1820) u Savskom
jezeru.” 2016. Web. 28 Mar 2020.
Vancouver:
Jaćimović, Milica Lj. 1. Populaciona dinamika i ekotoksikologija crnog američkog
patuljastog soma (Ameiurus melas Rafinesque, 1820) u Savskom
jezeru. [Internet] [Thesis]. Univerzitet u Beogradu; 2016. [cited 2020 Mar 28].
Available from: https://fedorabg.bg.ac.rs/fedora/get/o:10958/bdef:Content/get.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Jaćimović, Milica Lj. 1. Populaciona dinamika i ekotoksikologija crnog američkog
patuljastog soma (Ameiurus melas Rafinesque, 1820) u Savskom
jezeru. [Thesis]. Univerzitet u Beogradu; 2016. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:10958/bdef:Content/get
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Cornell University
19.
Dalziel, Benjamin.
The Influence Of Collective Animal Movement On Population Dynamics
.
Degree: 2014, Cornell University
URL: http://hdl.handle.net/1813/37026
► Many populations exhibit collective behavior, where interactions among nearby individuals scale up to cause emergent patterns in the behavior of groups, as in the coordinated…
(more)
▼ Many populations exhibit collective behavior, where interactions among nearby individuals scale up to cause emergent patterns in the behavior of groups, as in the coordinated movement of a flock of birds or a school of fish. Populations influenced by collective behavior violate the assumption of mass action that underlies most ecological models, in which individuals are viewed as statistically independent. However, the ecological significance of collective behavior is not well understood, because studies have been limited to populations where high throughput ethological data is available, such as in the laboratory or in computer simulations. This dissertation tests for the signal of collective behavior in ecological data-data on the distribution patterns of organisms collected on a coarser spatial and temporal scale than the underlying processes-and examines the influence of collective behavior on
population dynamics. Data on the locations of migratory caribou (collected every five days by satellite tracking collars) are shown to be generated by two distinct processes. The first process creates broad-scale spatiotemporal order in movement patterns, and is likely driven by seasonally and spatially fluctuating environmental and physiological cues. The second process creates finer-scale order that is likely due to behavioral interactions among nearby individuals. The strength of alignment in the velocities of nearby individuals varies systematically with time of year, suggesting that collective behavior can be a dynamic property of migratory populations. The dissertation then considers collective mobility patterns in humans, analyzing census data on the commuting patterns of workers in Canadian cities. The level of order in commuting patterns varies systematically among cities. In particular, in some cities a disproportionate number of workers travel to work in a few focal locations. Simulations of the spread of a respiratory infection in each city predict differences among cities in the risk of an epidemic, due to systematic variation in the level of order in the commuting patterns of workers. In particular, larger cities tend to be more highly organized and, as a result, have a disproportionately higher probability of sparking an epidemic. The dissertation then explores the role of large cities in supporting the emergence of a new strain of influenza in dogs. The analysis combines demographic data on animal shelters in the United States, molecular data from the pathogen and seroprevalence estimates from the literature to show that large animal shelters in major metropolitan areas function as endemic reservoirs for the virus, facilitating sporadic outbreaks in the wider
population. In sum the dissertation research shows that collective behavior can sometimes be detected and characterized in ecological data without recourse to fine-scale behavioral observations, and that collective behavior can significantly alter
population dynamics at broad spatial and temporal scales.
Advisors/Committee Members: Parrish, Colin Ross (committeeMember), Hooker, Giles J. (committeeMember), Geber, Monica Ann (committeeMember).
Subjects/Keywords: collective behavior;
population dynamics;
epidemic model
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APA (6th Edition):
Dalziel, B. (2014). The Influence Of Collective Animal Movement On Population Dynamics
. (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/37026
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Dalziel, Benjamin. “The Influence Of Collective Animal Movement On Population Dynamics
.” 2014. Thesis, Cornell University. Accessed March 28, 2020.
http://hdl.handle.net/1813/37026.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dalziel, Benjamin. “The Influence Of Collective Animal Movement On Population Dynamics
.” 2014. Web. 28 Mar 2020.
Vancouver:
Dalziel B. The Influence Of Collective Animal Movement On Population Dynamics
. [Internet] [Thesis]. Cornell University; 2014. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/1813/37026.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dalziel B. The Influence Of Collective Animal Movement On Population Dynamics
. [Thesis]. Cornell University; 2014. Available from: http://hdl.handle.net/1813/37026
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
20.
Olaeta, Haritz.
Pharmacokinetics, cell kinetics and pharmacodynamics : a Bayesian approach.
Degree: PhD, 2002, University of Bristol
URL: http://hdl.handle.net/1983/456ab579-a29a-4096-aeec-2a722cf9ec20
Subjects/Keywords: 519; Population dynamics
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APA ·
Chicago ·
MLA ·
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CSE |
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Olaeta, H. (2002). Pharmacokinetics, cell kinetics and pharmacodynamics : a Bayesian approach. (Doctoral Dissertation). University of Bristol. Retrieved from http://hdl.handle.net/1983/456ab579-a29a-4096-aeec-2a722cf9ec20
Chicago Manual of Style (16th Edition):
Olaeta, Haritz. “Pharmacokinetics, cell kinetics and pharmacodynamics : a Bayesian approach.” 2002. Doctoral Dissertation, University of Bristol. Accessed March 28, 2020.
http://hdl.handle.net/1983/456ab579-a29a-4096-aeec-2a722cf9ec20.
MLA Handbook (7th Edition):
Olaeta, Haritz. “Pharmacokinetics, cell kinetics and pharmacodynamics : a Bayesian approach.” 2002. Web. 28 Mar 2020.
Vancouver:
Olaeta H. Pharmacokinetics, cell kinetics and pharmacodynamics : a Bayesian approach. [Internet] [Doctoral dissertation]. University of Bristol; 2002. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/1983/456ab579-a29a-4096-aeec-2a722cf9ec20.
Council of Science Editors:
Olaeta H. Pharmacokinetics, cell kinetics and pharmacodynamics : a Bayesian approach. [Doctoral Dissertation]. University of Bristol; 2002. Available from: http://hdl.handle.net/1983/456ab579-a29a-4096-aeec-2a722cf9ec20
University of Manchester
21.
Parra Rojas, César.
Intrinsic fluctuations in discrete and continuous time models.
Degree: PhD, 2017, University of Manchester
URL: https://www.research.manchester.ac.uk/portal/en/theses/intrinsic-fluctuations-in-discrete-and-continuous-time-models(d7006a2b-1496-44f2-8423-1f2fa72be1a5).html
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.728013
► This thesis explores the stochastic features of models of ecological systems in discrete and in continuous time. Our interest lies in models formulated at the…
(more)
▼ This thesis explores the stochastic features of models of ecological systems in discrete and in continuous time. Our interest lies in models formulated at the microscale, from which a mesoscopic description can be derived. The stochasticity present in the models, constructed in this way, is intrinsic to the systems under consideration and stems from their finite size. We start by exploring a susceptible-infectious-recovered model for epidemic spread on a network. We are interested in the case where the connectivity, or degree, of the individuals is characterised by a very broad, or heterogeneous, distribution, and in the effects of stochasticity on the dynamics, which may depart wildly from that of a homogeneous population. The model at the mesoscale corresponds to a system of stochastic differential equations with a very large number of degrees of freedom which can be reduced to a two-dimensional model in its deterministic limit. We show how this reduction can be carried over to the stochastic case by exploiting a time-scale separation in the deterministic system and carrying out a fast-variable elimination. We use simulations to show that the temporal behaviour of the epidemic obtained from the reduced stochastic model yields reasonably good agreement with the microscopic model under the condition that the maximum allowed degree that individuals can have is not too close to the population size. This is illustrated using time series, phase diagrams and the distribution of epidemic sizes. The general mesoscopic theory used in continuous-time models has only very recently been developed for discrete-time systems in one variable. Here, we explore this one-dimensional theory and find that, in contrast to the continuous-time case, large jumps can occur between successive iterates of the process, and this translates at the mesoscale into the need for specifying `boundary' conditions everywhere outside of the system. We discuss these and how to implement them in the stochastic difference equation in order to obtain results which are consistent with the microscopic model. We then extend the theoretical framework to make it applicable to systems containing an arbitrary number of degrees of freedom. In addition, we extend a number of analytical results from the one-dimensional stochastic difference equation to arbitrary dimension, for the distribution of fluctuations around fixed points, cycles and quasi-periodic attractors of the corresponding deterministic map. We also derive new expressions, describing the autocorrelation functions of the fluctuations, as well as their power spectrum. From the latter, we characterise the appearance of noise-induced oscillations in systems of dimension greater than one, which have been previously observed in continuous-time systems and are known as quasi-cycles. Finally, we explore the ability of intrinsic noise to induce chaotic behaviour in the system for parameter values for which the deterministic map presents a non-chaotic attractor; we find that this is possible for periodic, but not…
Subjects/Keywords: 576.5; Stochastic processes; Population dynamics; Mathematical epidemiology
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Parra Rojas, C. (2017). Intrinsic fluctuations in discrete and continuous time models. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/intrinsic-fluctuations-in-discrete-and-continuous-time-models(d7006a2b-1496-44f2-8423-1f2fa72be1a5).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.728013
Chicago Manual of Style (16th Edition):
Parra Rojas, César. “Intrinsic fluctuations in discrete and continuous time models.” 2017. Doctoral Dissertation, University of Manchester. Accessed March 28, 2020.
https://www.research.manchester.ac.uk/portal/en/theses/intrinsic-fluctuations-in-discrete-and-continuous-time-models(d7006a2b-1496-44f2-8423-1f2fa72be1a5).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.728013.
MLA Handbook (7th Edition):
Parra Rojas, César. “Intrinsic fluctuations in discrete and continuous time models.” 2017. Web. 28 Mar 2020.
Vancouver:
Parra Rojas C. Intrinsic fluctuations in discrete and continuous time models. [Internet] [Doctoral dissertation]. University of Manchester; 2017. [cited 2020 Mar 28].
Available from: https://www.research.manchester.ac.uk/portal/en/theses/intrinsic-fluctuations-in-discrete-and-continuous-time-models(d7006a2b-1496-44f2-8423-1f2fa72be1a5).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.728013.
Council of Science Editors:
Parra Rojas C. Intrinsic fluctuations in discrete and continuous time models. [Doctoral Dissertation]. University of Manchester; 2017. Available from: https://www.research.manchester.ac.uk/portal/en/theses/intrinsic-fluctuations-in-discrete-and-continuous-time-models(d7006a2b-1496-44f2-8423-1f2fa72be1a5).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.728013
Georgia Tech
22.
Jover, Luis F.
Infection networks, life-history traits, and dynamics in complex virus-microbe systems.
Degree: PhD, Physics, 2016, Georgia Tech
URL: http://hdl.handle.net/1853/55560
► Bacteria and their viral parasites, i.e., phages, are found in natural environments from oceans, soils to the human gut. Phages are key players in ecosystems…
(more)
▼ Bacteria and their viral parasites, i.e., phages, are found in natural environments from oceans, soils to the human gut. Phages are key players in ecosystems responsible for a significant portion of microbial mortality. Individual phages can infect a subset of bacteria types in a community as part of complex infection networks. In this thesis we study the interplay between infection networks, life-history traits, and the resulting
dynamics in systems with multiple host and phage types. First, we study the trade-off necessary for the coexistence of multiple hosts and phages in systems with statistically realistic infection networks. Second, we study how the trends of network architecture vs. biodiversity depend on life-history traits. Finally, we put forward a method for reconstructing infection networks using measurements of the densities from the
dynamics.
Advisors/Committee Members: Weitz, Joshua S (advisor), Weisenfeld, Kurt (committee member), Romber, Justin (committee member), Sponberg, Simon (committee member), Brown, Sam (committee member).
Subjects/Keywords: virus-bacteria; complex networks; population dynamics
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APA ·
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APA (6th Edition):
Jover, L. F. (2016). Infection networks, life-history traits, and dynamics in complex virus-microbe systems. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/55560
Chicago Manual of Style (16th Edition):
Jover, Luis F. “Infection networks, life-history traits, and dynamics in complex virus-microbe systems.” 2016. Doctoral Dissertation, Georgia Tech. Accessed March 28, 2020.
http://hdl.handle.net/1853/55560.
MLA Handbook (7th Edition):
Jover, Luis F. “Infection networks, life-history traits, and dynamics in complex virus-microbe systems.” 2016. Web. 28 Mar 2020.
Vancouver:
Jover LF. Infection networks, life-history traits, and dynamics in complex virus-microbe systems. [Internet] [Doctoral dissertation]. Georgia Tech; 2016. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/1853/55560.
Council of Science Editors:
Jover LF. Infection networks, life-history traits, and dynamics in complex virus-microbe systems. [Doctoral Dissertation]. Georgia Tech; 2016. Available from: http://hdl.handle.net/1853/55560
Rice University
23.
Bibian, Andrew James.
Population Dynamics of Heritable Symbionts when Accounting for the Life History Complexity of their Host.
Degree: MA, Natural Sciences, 2015, Rice University
URL: http://hdl.handle.net/1911/87751
► I developed theory and experiments to understand how complex life cycles of a host affect the dynamics of their heritable symbionts, important ecological and evolutionary…
(more)
▼ I developed theory and experiments to understand how complex life cycles of a host affect the
dynamics of their heritable symbionts, important ecological and evolutionary agents. With symbiont persistence and prevalence being a function of their effects on host fitness and transmission efficiencies, accounting for host demographic “storage,” in the form of non-reproductive or dormant host life stages, leads to unexpected results. Symbiont loss from demographic storage affects persistence similarly to loss from a host reproductive stage. Loss from host dormancy, however, affect
dynamics if symbiont passage through the dormant stage occurs at a high rate, which we observed with experiments. Demographic rescue and symbiont persistence was possible, and observed, whereby stage specific symbiont benefits compensate for symbiont loss. Empirically, accounting for host dormancy in the form of a plant seed bank facilitated symbiont persistence and prevalence. Our results emphasize the importance of accounting for realistic complexity in host-symbiont
dynamics.
Advisors/Committee Members: Miller, Tom E.X. (advisor), Dunham, Amy (committee member), Rudolph, Volker (committee member).
Subjects/Keywords: Host-symbiont dynamics; stage structured population
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APA ·
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Export
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APA (6th Edition):
Bibian, A. J. (2015). Population Dynamics of Heritable Symbionts when Accounting for the Life History Complexity of their Host. (Masters Thesis). Rice University. Retrieved from http://hdl.handle.net/1911/87751
Chicago Manual of Style (16th Edition):
Bibian, Andrew James. “Population Dynamics of Heritable Symbionts when Accounting for the Life History Complexity of their Host.” 2015. Masters Thesis, Rice University. Accessed March 28, 2020.
http://hdl.handle.net/1911/87751.
MLA Handbook (7th Edition):
Bibian, Andrew James. “Population Dynamics of Heritable Symbionts when Accounting for the Life History Complexity of their Host.” 2015. Web. 28 Mar 2020.
Vancouver:
Bibian AJ. Population Dynamics of Heritable Symbionts when Accounting for the Life History Complexity of their Host. [Internet] [Masters thesis]. Rice University; 2015. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/1911/87751.
Council of Science Editors:
Bibian AJ. Population Dynamics of Heritable Symbionts when Accounting for the Life History Complexity of their Host. [Masters Thesis]. Rice University; 2015. Available from: http://hdl.handle.net/1911/87751
University of Florida
24.
Kneip, Eva.
The Relative Influence of Density and Climate on the Demography of a Subalpine Ground Squirrel Population.
Degree: MS, Interdisciplinary Ecology, 2010, University of Florida
URL: http://ufdc.ufl.edu/UFE0042252
► In the context of global climate change, understanding the causes and consequences of oscillations in populations is a central objective for ecologists. We utilized long-term…
(more)
▼ In the context of global climate change, understanding the causes and consequences of oscillations in populations is a central objective for ecologists. We utilized long-term (1990-2009) field data to investigate the influence of
population size and extrinsic environmental factors on the demographic parameters of golden-mantled ground squirrels (Callospermophilus lateralis; formerly, Spermophilus lateralis). Moreover, we examined how these influences are translated at the
population level. Survival varied by sex and age class, with highest survival for adult females (?=0.519, 95% CI: 0.462, 0.576) and lowest survival for juvenile males (?=0.120, 95% CI: 0.094, 0.152). There was evidence that
population size negatively influenced survival with a time lag of 1 year. Among the extrinsic environmental factors considered, rainfall and an index of predator abundance substantially influenced survival. Breeding probability (probability that a female successfully weans ?1 pups) was higher for older females (?=0.717, 95% CI=0.639 - 0.79) than for yearlings (?=0.313, 95% CI: 0.228, - 0.412). There was evidence that rainfall negatively influenced breeding probability of both older and yearling females with a time lag of 1 year. Litter size ranged 1-8 pups, with a mean of 4.81 (95% CI: 4.532, 5.08). There was no evidence that litter size varied among age classes or over time, or was influenced by
population size or extrinsic environmental factors. The year-to-year deterministic
population growth rate was highly variable, ranging from 0.445 to 1.244, and was below replacement (? < 1) for 10 out of 18 years. Using 50,000 simulations and assuming a uniform independently and identically distributed environment, the stochastic
population growth rate, ?s was 0.912 suggesting an 8.8% annual
population decline. This result was less than the deterministic growth rate of the mean matrix, ?M (0.944) but it was similar to the overall deterministic growth rate (?=0.905, 95% CI: 0.812-0.998) which was based on pooled data. As a result of lower-level elasticity analysis, the deterministic
population growth rate was most sensitive to proportionate changes in adult survival. All three measures of stochastic elasticity indicated that ?s was proportionately most sensitive to juvenile survival. The GMGS
population is predicted to decline with probability of extinction approaching 90% in 50 years for the density-independent model. When density-dependence and immigration were included in our model the risk of extinction was reduced to zero. Our results suggest that
population size and extrinsic environmental factors do not affect all demographic variables in the same fashion and both factors act in concert to influence the size of our study
population. As environmental variability is likely to exacerbate the fluctuations in GMGS abundance, the likelihood that the
population falls below a critical threshold will increase. Therefore, the effects of an increased environmental stochasticity may amplify the risk of quasi-extinction of this
population. ( en…
Advisors/Committee Members: Oli, Madan K. (committee chair), Sunquist, Melvin E. (committee member), Van Vuren, Dirk (committee member).
Subjects/Keywords: Breeding; Climate change; Demography; Ground squirrels; Juveniles; Population density; Population dynamics; Population estimates; Population growth rate; Population size; demography, density, dynamics, environmental, external, golden, lateralis, population, spermophilus, squirrel, stochastic
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APA (6th Edition):
Kneip, E. (2010). The Relative Influence of Density and Climate on the Demography of a Subalpine Ground Squirrel Population. (Masters Thesis). University of Florida. Retrieved from http://ufdc.ufl.edu/UFE0042252
Chicago Manual of Style (16th Edition):
Kneip, Eva. “The Relative Influence of Density and Climate on the Demography of a Subalpine Ground Squirrel Population.” 2010. Masters Thesis, University of Florida. Accessed March 28, 2020.
http://ufdc.ufl.edu/UFE0042252.
MLA Handbook (7th Edition):
Kneip, Eva. “The Relative Influence of Density and Climate on the Demography of a Subalpine Ground Squirrel Population.” 2010. Web. 28 Mar 2020.
Vancouver:
Kneip E. The Relative Influence of Density and Climate on the Demography of a Subalpine Ground Squirrel Population. [Internet] [Masters thesis]. University of Florida; 2010. [cited 2020 Mar 28].
Available from: http://ufdc.ufl.edu/UFE0042252.
Council of Science Editors:
Kneip E. The Relative Influence of Density and Climate on the Demography of a Subalpine Ground Squirrel Population. [Masters Thesis]. University of Florida; 2010. Available from: http://ufdc.ufl.edu/UFE0042252
University of Oxford
25.
Dooley, Claire.
Allee effects : empirical analyses of wild British butterfly populations and theoretical implications for population synchrony.
Degree: PhD, 2014, University of Oxford
URL: http://ora.ox.ac.uk/objects/uuid:97da58d7-2bf3-45ca-a563-5394c7b97050
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604494
► An Allee effect is a density-dependent process that can be responsible for the extinction of small populations. This thesis focuses on the detection of Allee…
(more)
▼ An Allee effect is a density-dependent process that can be responsible for the extinction of small populations. This thesis focuses on the detection of Allee effects, along with other density-dependent processes, and their influence on population synchrony. In chapter 2 I investigate the spatial variation in influential density-dependent processes and density-independent weather factors for the large skipper butterfly Ochlodes sylvanus across its British range. I find both qualitative and quantitative spatial variation in these processes and factors driving population dynamics. In chapter 3, I develop and test a Bayesian methodology, that I then use in chapter 4 to analyse local population level dynamics for 38 British butterfly species. For 35 of these species I found population level Allee effects and also found that phylogeny significant influenced a species’ susceptibility to Allee effects. Finally, in chapter 5 I examine the influence Allee effects have on network population synchrony in a theoretical framework.
Subjects/Keywords: 577.8; Ecology (zoology); Allee effects; British butterflies; population dynamics; population synchrony
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APA (6th Edition):
Dooley, C. (2014). Allee effects : empirical analyses of wild British butterfly populations and theoretical implications for population synchrony. (Doctoral Dissertation). University of Oxford. Retrieved from http://ora.ox.ac.uk/objects/uuid:97da58d7-2bf3-45ca-a563-5394c7b97050 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604494
Chicago Manual of Style (16th Edition):
Dooley, Claire. “Allee effects : empirical analyses of wild British butterfly populations and theoretical implications for population synchrony.” 2014. Doctoral Dissertation, University of Oxford. Accessed March 28, 2020.
http://ora.ox.ac.uk/objects/uuid:97da58d7-2bf3-45ca-a563-5394c7b97050 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604494.
MLA Handbook (7th Edition):
Dooley, Claire. “Allee effects : empirical analyses of wild British butterfly populations and theoretical implications for population synchrony.” 2014. Web. 28 Mar 2020.
Vancouver:
Dooley C. Allee effects : empirical analyses of wild British butterfly populations and theoretical implications for population synchrony. [Internet] [Doctoral dissertation]. University of Oxford; 2014. [cited 2020 Mar 28].
Available from: http://ora.ox.ac.uk/objects/uuid:97da58d7-2bf3-45ca-a563-5394c7b97050 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604494.
Council of Science Editors:
Dooley C. Allee effects : empirical analyses of wild British butterfly populations and theoretical implications for population synchrony. [Doctoral Dissertation]. University of Oxford; 2014. Available from: http://ora.ox.ac.uk/objects/uuid:97da58d7-2bf3-45ca-a563-5394c7b97050 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604494
University of Aberdeen
26.
Fernandez de la Pradilla Villar, Jose Ignacio.
Land use and population regulation : vole dynamics in a grazing experiment.
Degree: 2009, University of Aberdeen
URL: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=62156
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521180
► Land use is the major global driver of biodiversity loss and ecosystem change. In this thesis the impact of an important land use practice, livestock…
(more)
▼ Land use is the major global driver of biodiversity loss and ecosystem change. In this thesis the impact of an important land use practice, livestock grazing, in the population dynamics of a keystone species of temperate grassland ecosystems, the field vole Microtus agrestis, was investigated in a manipulative grazing experiment in the UK uplands. Vole densities at different spatial scales declined with increasing grazing intensities. This decline was especially acute and non-linear at high altitudes, where the preferred habitat of voles is less abundant. The activity of an important vole predator, the red fox Vulpes vulpes, declined accordingly. The evidence suggested that the availability of voles to foxes changed between grazing treatments. A behavioural response to reduced habitat quality was the most likely mechanism to explain vole declines with grazing, while food limitation or increased predation received no support as valid mechanisms to explain vole declines. Grazing increased vole mobility, changed sex-specific patterns of natal dispersal, affected the age structure of the female population and led to biases in sex ratios amongst the adult population. Despite profound demographic changes, the dynamics of the vole population was unaffected by grazing. Neither direct nor delayed density dependent dynamics nor seasonal dynamics changed between grazing treatments. Apparent survival in adults was not direct density dependent and similar in ungrazed and grazed areas. Negative direct density dependence in reproductive and immigration rates, and population growth rates at different spatial scales was strong and did not change in response to grazing. Thus, livestock grazing reduced vole densities probably through a behavioural response to grazing, but it did not affect the demographic mechanisms of population regulation or vole population dynamics.
Subjects/Keywords: 591.7; Voles : Population biology : Ecology : Land use : Population dynamics
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APA (6th Edition):
Fernandez de la Pradilla Villar, J. I. (2009). Land use and population regulation : vole dynamics in a grazing experiment. (Doctoral Dissertation). University of Aberdeen. Retrieved from http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=62156 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521180
Chicago Manual of Style (16th Edition):
Fernandez de la Pradilla Villar, Jose Ignacio. “Land use and population regulation : vole dynamics in a grazing experiment.” 2009. Doctoral Dissertation, University of Aberdeen. Accessed March 28, 2020.
http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=62156 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521180.
MLA Handbook (7th Edition):
Fernandez de la Pradilla Villar, Jose Ignacio. “Land use and population regulation : vole dynamics in a grazing experiment.” 2009. Web. 28 Mar 2020.
Vancouver:
Fernandez de la Pradilla Villar JI. Land use and population regulation : vole dynamics in a grazing experiment. [Internet] [Doctoral dissertation]. University of Aberdeen; 2009. [cited 2020 Mar 28].
Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=62156 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521180.
Council of Science Editors:
Fernandez de la Pradilla Villar JI. Land use and population regulation : vole dynamics in a grazing experiment. [Doctoral Dissertation]. University of Aberdeen; 2009. Available from: http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=62156 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521180
Université Catholique de Louvain
27.
Radchuk, Viktoriia.
Dealing with biological complexity in Population Viability Analysis lessons from two endangered butterfly species.
Degree: 2012, Université Catholique de Louvain
URL: http://hdl.handle.net/2078.1/120897
► Conservation biology, the science aiming at the preservation of biodiversity on Earth, uses tools and models to forecast the fate of threatened species. Being a…
(more)
▼ Conservation biology, the science aiming at the preservation of biodiversity on Earth, uses tools and models to forecast the fate of threatened species. Being a “crisis discipline”, it must often provide management guidelines despite incomplete evidence and constant threat of species extinctions. One of the priorities of quantitative conservation biologists is to find the balance between the investment (time, money and manpower) in model development and the reliability of its predictions.
This PhD thesis focussed on Population Viability Analysis (PVA) models of two threatened butterfly species: Boloria eunomia and Maculinea alcon, with a simple and a more complex life cycle, respectively. I developed a series of PVA models differing in their complexity and compared them in terms of cost/benefit ratio.
Firstly, in a series of laboratory and field experiments I estimated the vital rates of B. eunomia and used them to predict the overall population fate with a simple matrix model. Next, I compared four individual-based PVA models (IBM), differing in environmental factors affecting the survival of B. eunomia, in their ability to reproduce a series of empirical patterns. I then contrasted the best IBM with its more aggregated counterpart, a yearly stage-based model, showing the latter is sufficient for ranking climate change scenarios, whereas the daily IBM can be used for asking some more specific questions about population functioning. Finally, I developed a spatially and financially explicit stage-based PVA model for M. alcon and used it to find the most cost-effective management scenario.
This thesis concludes that there is no a-priori and predefined answer as to which model complexity is the most suitable in each specific situation. Furthermore, developing a set of different models rather than using a single one brings a deeper and more complete understanding of the natural system.
(BIOL 3) – UCL, 2012
Advisors/Committee Members: UCL - SST/ELI/ELIB - Biodiversity, Schtickzelle, Nicolas, De Keersmaecker, Marie-Laurence, Van Dyck, Hans, Baguette, Michel, Hovestadt, Thomas, Grimm, Volker.
Subjects/Keywords: Population dynamics; Modelling; Individual-based model; Structured population model; Butterfly; Complexity
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APA ·
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APA (6th Edition):
Radchuk, V. (2012). Dealing with biological complexity in Population Viability Analysis lessons from two endangered butterfly species. (Thesis). Université Catholique de Louvain. Retrieved from http://hdl.handle.net/2078.1/120897
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Radchuk, Viktoriia. “Dealing with biological complexity in Population Viability Analysis lessons from two endangered butterfly species.” 2012. Thesis, Université Catholique de Louvain. Accessed March 28, 2020.
http://hdl.handle.net/2078.1/120897.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Radchuk, Viktoriia. “Dealing with biological complexity in Population Viability Analysis lessons from two endangered butterfly species.” 2012. Web. 28 Mar 2020.
Vancouver:
Radchuk V. Dealing with biological complexity in Population Viability Analysis lessons from two endangered butterfly species. [Internet] [Thesis]. Université Catholique de Louvain; 2012. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/2078.1/120897.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Radchuk V. Dealing with biological complexity in Population Viability Analysis lessons from two endangered butterfly species. [Thesis]. Université Catholique de Louvain; 2012. Available from: http://hdl.handle.net/2078.1/120897
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of South Africa
28.
Nembudani, Madzinge Ellen.
Spatio-temporal dynamics in the provision of primary school education in Vhembe District, Limpopo, South Africa
.
Degree: 2014, University of South Africa
URL: http://hdl.handle.net/10500/18694
► Spatial, temporal and population dynamics have influenced learner enrolments in Vhembe District primary schools in Limpopo, South Africa. Vhembe District primary schools have in recent…
(more)
▼ Spatial, temporal and
population dynamics have influenced learner enrolments in Vhembe District primary schools in Limpopo, South Africa. Vhembe District primary schools have in recent years experienced closure of some of its primary schools due to declining learner enrolments. The
dynamics of demographic factors such as migration, fertility and mortality cause fluctuations in the school-age
population over time and across space. Poor economic development, the location of the district and the spatial distribution of primary schools make the situation in this rural-based district even more complex. The communities of Vhembe District are discontent about the state of affairs in the area regarding the provision of education and the closure of schools. The closure of schools destabilises the social cohesion amongst members of the community and disempowers them, while inadequate provision of primary school education makes them feel neglected and robbed of their constitutional right. This study investigated the causes of declining learner enrolment and the effect of the closure of schools on the communities. To achieve the objectives data came from questionnaires at household level and from interviews conducted with educators, circuit managers, officials in the Limpopo Education Department and traditional leaders. The study found that declining fertility and out-migration from the area are responsible for a declining school-age
population. This is the reality and the communities of Vhembe District will have to live with it because overall learner enrolments continue to decline. Lack of a planning model in the former Venda territory led to an over-supply of primary schools thus schools in close proximity had to compete for learners. Poorly equipped schools and general development of the area exacerbate the problem and some members of the community perceive education in this district to be inferior. Younger economically active people are increasingly moving to places with better opportunities. This study offers some recommendations to alleviate the problems identified in Vhembe District. Application of a geographical approach to an adaptive strategy considers the natural environment in political, social and economic context. It suggests that education authorities could apply such a strategy to make the schools in rural areas more sustainable
Advisors/Committee Members: Fairhurst, U. J. (U. Joan) (advisor).
Subjects/Keywords: Spatio-temporal;
Population dynamics;
Primary schools;
School-age population;
Learner enrolment
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APA (6th Edition):
Nembudani, M. E. (2014). Spatio-temporal dynamics in the provision of primary school education in Vhembe District, Limpopo, South Africa
. (Doctoral Dissertation). University of South Africa. Retrieved from http://hdl.handle.net/10500/18694
Chicago Manual of Style (16th Edition):
Nembudani, Madzinge Ellen. “Spatio-temporal dynamics in the provision of primary school education in Vhembe District, Limpopo, South Africa
.” 2014. Doctoral Dissertation, University of South Africa. Accessed March 28, 2020.
http://hdl.handle.net/10500/18694.
MLA Handbook (7th Edition):
Nembudani, Madzinge Ellen. “Spatio-temporal dynamics in the provision of primary school education in Vhembe District, Limpopo, South Africa
.” 2014. Web. 28 Mar 2020.
Vancouver:
Nembudani ME. Spatio-temporal dynamics in the provision of primary school education in Vhembe District, Limpopo, South Africa
. [Internet] [Doctoral dissertation]. University of South Africa; 2014. [cited 2020 Mar 28].
Available from: http://hdl.handle.net/10500/18694.
Council of Science Editors:
Nembudani ME. Spatio-temporal dynamics in the provision of primary school education in Vhembe District, Limpopo, South Africa
. [Doctoral Dissertation]. University of South Africa; 2014. Available from: http://hdl.handle.net/10500/18694
University of Miami
29.
Stipek, Clinton William.
Population Dynamics of Seagrass Communities in Biscayne Bay, Florida: Exploring the Influence of Salinity on Seascape Fragmentation.
Degree: MS, Marine Biology and Ecology (Marine), 2018, University of Miami
URL: https://scholarlyrepository.miami.edu/oa_theses/741
► Seagrass communities display complex population dynamics that are presently poorly understood. While most studies of disturbance on seagrass habitats have focused on changes in…
(more)
▼ Seagrass communities display complex
population dynamics that are presently poorly understood. While most studies of disturbance on seagrass habitats have focused on changes in biomass at small, quadrat-level scales, limited information is available on the impacts of disturbances on seagrass patch
dynamics on a broad scale. In this study, a landscape approach based on remote sensing imagery and
population modelling were applied to understand seagrass patch
dynamics and forecast the fate of these important communities in Biscayne Bay, Miami, Florida, US. The seagrass communities of Biscayne Bay are especially influenced by the modifications of the Everglades watershed that has significantly changed the timing of freshwater deliveries and nearshore salinity patterns over the last 70 years. This research evaluated the historical influence of salinity on seagrass communities and how changes in salinity may cause seascape fragmentation by documenting the long-term
population dynamics of seagrass habitats found adjacent and distant to freshwater canals. A positive outcome of this study is that the historical analysis covering > 70 years revealed remarkable persistence of seagrass cover even in habitats that were modified by the construction of freshwater canals. Fragmentation rates of the seagrass patches varied spatially and temporally but were higher in sites adjacent to canals compared to sites removed from these influences. Furthermore, there was a clear trend in mortality rates in relation to the size of seagrass patches, with the smallest patches undergoing 57% annual mortality on average. Model simulations based on observed patch
dynamics suggest that seagrass meadows can persist as long as the recruitment of new patches compensates for patch fragmentation. The combination of higher fragmentation rates and the higher mortality of smaller seagrass patches in habitats exposed to pulses of low salinity raises concern for the long-term persistence of seagrass meadows in nearshore urban habitats of Biscayne Bay that are presently targets of Everglades restoration. The combined remote sensing and
population modelling approach used here provide evaluation and predictive tools that can be used by managers to track seagrass status and stress-response at seascape levels not available previously for the seagrasses of South Florida.
Advisors/Committee Members: Diego Lirman, Elizabeth Babcock, Rolando Santos.
Subjects/Keywords: Fragmentation; population dynamics; seagrass; landscape approach; population modelling; spatial analysis
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APA (6th Edition):
Stipek, C. W. (2018). Population Dynamics of Seagrass Communities in Biscayne Bay, Florida: Exploring the Influence of Salinity on Seascape Fragmentation. (Thesis). University of Miami. Retrieved from https://scholarlyrepository.miami.edu/oa_theses/741
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Stipek, Clinton William. “Population Dynamics of Seagrass Communities in Biscayne Bay, Florida: Exploring the Influence of Salinity on Seascape Fragmentation.” 2018. Thesis, University of Miami. Accessed March 28, 2020.
https://scholarlyrepository.miami.edu/oa_theses/741.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Stipek, Clinton William. “Population Dynamics of Seagrass Communities in Biscayne Bay, Florida: Exploring the Influence of Salinity on Seascape Fragmentation.” 2018. Web. 28 Mar 2020.
Vancouver:
Stipek CW. Population Dynamics of Seagrass Communities in Biscayne Bay, Florida: Exploring the Influence of Salinity on Seascape Fragmentation. [Internet] [Thesis]. University of Miami; 2018. [cited 2020 Mar 28].
Available from: https://scholarlyrepository.miami.edu/oa_theses/741.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Stipek CW. Population Dynamics of Seagrass Communities in Biscayne Bay, Florida: Exploring the Influence of Salinity on Seascape Fragmentation. [Thesis]. University of Miami; 2018. Available from: https://scholarlyrepository.miami.edu/oa_theses/741
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Southern Mississippi
30.
Dippold, David Arthur.
Fishery and Population Dynamics of Mississippi’s Spotted Seatrout.
Degree: MS, Coastal Sciences, Gulf Coast Research Laboratory, 2016, University of Southern Mississippi
URL: https://aquila.usm.edu/masters_theses/174
► Spotted Seatrout (Cynoscion nebulosus) is the most popular recreational inshore fishery in Mississippi coastal waters. Because of the popularity of Spotted Seatrout in Mississippi…
(more)
▼ Spotted Seatrout (
Cynoscion nebulosus) is the most popular recreational inshore fishery in Mississippi coastal waters. Because of the popularity of Spotted Seatrout in Mississippi as a recreational target and the magnitude of harvest, quantitative approaches to describe the
population and fishery
dynamics of the Mississippi stock are needed to continue the sustainability of the stock. Quantitative approaches to describing stock
dynamics are useful because they can help describe
population characteristics, assess the current status of the stock, and be used to evaluate alternative management strategies. In this thesis, I use a suite of quantitative methods to describe, evaluate, and assess the
population and fishery
dynamics of the Mississippi Spotted Seatrout stock. Specifically, I describe the Spotted Seatrout length-at-age relationship using a multi-model approach, evaluate the potential effects of different management regimes on the yield, reproductive output, and length structure on the Mississippi Spotted Seatrout stock, and evaluate the status of the Mississippi Spotted Seatrout stock using a statistical catch-at-age model. The results of this project can be used to better inform and support the management of Spotted Seatrout in Mississippi.
Advisors/Committee Members: Robert Leaf, Mark Peterson, Read Hendon.
Subjects/Keywords: marine fisheries; population dynamics; Gulf of Mexico; tag-recapture; Population Biology
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APA (6th Edition):
Dippold, D. A. (2016). Fishery and Population Dynamics of Mississippi’s Spotted Seatrout. (Masters Thesis). University of Southern Mississippi. Retrieved from https://aquila.usm.edu/masters_theses/174
Chicago Manual of Style (16th Edition):
Dippold, David Arthur. “Fishery and Population Dynamics of Mississippi’s Spotted Seatrout.” 2016. Masters Thesis, University of Southern Mississippi. Accessed March 28, 2020.
https://aquila.usm.edu/masters_theses/174.
MLA Handbook (7th Edition):
Dippold, David Arthur. “Fishery and Population Dynamics of Mississippi’s Spotted Seatrout.” 2016. Web. 28 Mar 2020.
Vancouver:
Dippold DA. Fishery and Population Dynamics of Mississippi’s Spotted Seatrout. [Internet] [Masters thesis]. University of Southern Mississippi; 2016. [cited 2020 Mar 28].
Available from: https://aquila.usm.edu/masters_theses/174.
Council of Science Editors:
Dippold DA. Fishery and Population Dynamics of Mississippi’s Spotted Seatrout. [Masters Thesis]. University of Southern Mississippi; 2016. Available from: https://aquila.usm.edu/masters_theses/174
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. 
Open Access Theses and Dissertations