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Texas A&M University
1.
Mendez-Jimenez, Adriana.
Influence of Surface Currents in the Dispersal Pathways of Eggs of Cubera Snapper, Lutjanus cyanopterus (Cuvier, 1828), at a Spawning Aggregation Site at Gladden Spit, Belize.
Degree: MS, Geography, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11876 
► Most large reef fish use a migratory reproductive strategy and tend to spawn in aggregations that occur at predictable locations and times. Though numerous hypotheses…
(more)
▼ Most large reef fish use a migratory reproductive strategy and tend to spawn in aggregations that occur at predictable locations and times. Though numerous hypotheses have been formulated to explain the reasons behind this phenomenon, there remain few data to evaluate the relative merits of various hypotheses. Oceanographic variables and lunar cycles are believed to drive the timing and location of this reproductive strategy. However, the dynamics of the interaction between coastal currents, water temperature, biomass concentrations, spawning site selection and gamete transport are still unclear. This study aimed to examine the influence that currents exert on gametes released at spawning aggregations of Cubera snapper Lutjanus cyanopterus (Cuvier, 1828) at Gladden Spit, Belize. It was hypothesized that surface currents flowed offshore at the time and location of spawning. However, observations from this study, using Lagrangian and Eulerian methods, indicated that eggs most likely travel westerly towards the reef and into the reef channel. The dispersal rate of eggs appeared to be explained by a power relationship, with buoyant fertilized eggs dispersing horizontally such that the area of the spawning cloud increased with time. Egg density within the spawning cloud generally decreased over time as it dispersed with the predominant surface currents. Most importantly low-cost surface drifters area an appropriate, highly replicable way to monitor surface ocean currents at spawning sides in areas where more sophisticated methods are not available. Understanding how abiotic factors influence the occurrence of multispecies spawning aggregations will lead to better conservation and management strategies in the Western Caribbean.
Advisors/Committee Members: Heyman, William D. (advisor), DiMarco, Steven F. (committee member), Houser, Christopher (committee member).
Subjects/Keywords: Spawning aggregations; Cubera snapper; Gladden Spit; surface currents; drogued surface drifters
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APA (6th Edition):
Mendez-Jimenez, A. (2012). Influence of Surface Currents in the Dispersal Pathways of Eggs of Cubera Snapper, Lutjanus cyanopterus (Cuvier, 1828), at a Spawning Aggregation Site at Gladden Spit, Belize. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11876
Chicago Manual of Style (16th Edition):
Mendez-Jimenez, Adriana. “Influence of Surface Currents in the Dispersal Pathways of Eggs of Cubera Snapper, Lutjanus cyanopterus (Cuvier, 1828), at a Spawning Aggregation Site at Gladden Spit, Belize.” 2012. Masters Thesis, Texas A&M University. Accessed April 19, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11876.
MLA Handbook (7th Edition):
Mendez-Jimenez, Adriana. “Influence of Surface Currents in the Dispersal Pathways of Eggs of Cubera Snapper, Lutjanus cyanopterus (Cuvier, 1828), at a Spawning Aggregation Site at Gladden Spit, Belize.” 2012. Web. 19 Apr 2021.
Vancouver:
Mendez-Jimenez A. Influence of Surface Currents in the Dispersal Pathways of Eggs of Cubera Snapper, Lutjanus cyanopterus (Cuvier, 1828), at a Spawning Aggregation Site at Gladden Spit, Belize. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11876.
Council of Science Editors:
Mendez-Jimenez A. Influence of Surface Currents in the Dispersal Pathways of Eggs of Cubera Snapper, Lutjanus cyanopterus (Cuvier, 1828), at a Spawning Aggregation Site at Gladden Spit, Belize. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11876
Texas A&M University
2.
Smith, William.
Using Style of Participation among Texas Inshore Fishing Guides to Understand Displacement Behavior due to Perceived Spotted Seatrout (Cynoscion nebulosus) Population Declines.
Degree: PhD, Recreation, Park, and Tourism Sciences, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10946
► Characterization of distinct angler fishing styles (e.g., how, where, and with what) allows resource managers the ability to predict how perceived impacts or modifications to…
(more)
▼ Characterization of distinct angler fishing styles (e.g., how, where, and with what) allows resource managers the ability to predict how perceived impacts or modifications to fisheries resources (i.e., decline of fish species population) may impact different user groups. Recreation specialization provides a useful framework for understanding participation diversity among recreationists in terms of unique styles of participation. Bryan suggested that within an activity distinct types of participants exist that demonstrate characteristic styles of participation. Fundamental to Bryan's development of specialization were contextual attributes that characterize participant engagement in a recreation activity. However, advancement in specialization has been accompanied by a departure from Bryan's original conceptualization describing activity context. I revisited how specialization is operationalized and developed a contextual style of participation typology and self-classification measure to investigate displacement and substitution behavior among
Texas inshore fishing guides.
Data were collected in two separate phases. In 2010, I conducted an exploratory investigation that included eighteen face-to-face, in-depth interviews with key informants spanning the entire coast. In 2011, I conducted a quantitative investigation that included mailing a 12 page self-administered survey to all
Texas Parks and Wildlife licensed saltwater fishing guides (n=909). Thematic analysis drawing on grounded theory revealed that the salience of six contextual attributes (i.e., bait type, tackle type, fishing method, casting tactic, water depth, and fish species) that characterized four distinct styles of participation (e.g., Bait, All-purpose, Lure, and Sight-casting Guides). A unidimensional self-classification measure was developed based on my guide typology and discriminant analysis revealed it performed as well as a multidimensional measure of specialization. Ultimately, analysis of variance revealed significant differences existed among self-classification categories with respect to substitution behavior (e.g., targeting alternative species of fish, fishing in another location, and using alternative fishing methods or bait types) due to perceived spotted seatrout declines during 2010. In short, my findings suggest that anglers respond differently due to perceived spotted seatrout declines based on their preferred contextual style of participation. A contextual approach to understanding style of participation provides fisheries managers an effective method for understanding and mitigating social and ecological issues.
Advisors/Committee Members: Heyman, William D. (advisor), Kyle, Gerard (advisor), Sutton, Stephen (committee member), Shafer, C. Scott (committee member).
Subjects/Keywords: recreational fishing; fishing guides; fisheries management; recreation displacement
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APA (6th Edition):
Smith, W. (2012). Using Style of Participation among Texas Inshore Fishing Guides to Understand Displacement Behavior due to Perceived Spotted Seatrout (Cynoscion nebulosus) Population Declines. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10946
Chicago Manual of Style (16th Edition):
Smith, William. “Using Style of Participation among Texas Inshore Fishing Guides to Understand Displacement Behavior due to Perceived Spotted Seatrout (Cynoscion nebulosus) Population Declines.” 2012. Doctoral Dissertation, Texas A&M University. Accessed April 19, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10946.
MLA Handbook (7th Edition):
Smith, William. “Using Style of Participation among Texas Inshore Fishing Guides to Understand Displacement Behavior due to Perceived Spotted Seatrout (Cynoscion nebulosus) Population Declines.” 2012. Web. 19 Apr 2021.
Vancouver:
Smith W. Using Style of Participation among Texas Inshore Fishing Guides to Understand Displacement Behavior due to Perceived Spotted Seatrout (Cynoscion nebulosus) Population Declines. [Internet] [Doctoral dissertation]. Texas A&M University; 2012. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10946.
Council of Science Editors:
Smith W. Using Style of Participation among Texas Inshore Fishing Guides to Understand Displacement Behavior due to Perceived Spotted Seatrout (Cynoscion nebulosus) Population Declines. [Doctoral Dissertation]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10946
Texas A&M University
3.
Granados-Dieseldorff, Pablo.
The Mutton Snapper (Lutjanus analis) Spawning Aggregation Fishery at Gladden Spit, Belize: Inter-annual and Within-season Dynamics.
Degree: PhD, Geography, 2013, Texas A&M University
URL: http://hdl.handle.net/1969.1/151808
► Artisanal fisheries constitute a considerable source of employment, income, and protein for many coastal communities in the Caribbean. One of the region’s most valuable fisheries…
(more)
▼ Artisanal fisheries constitute a considerable source of employment, income, and protein for many coastal communities in the Caribbean. One of the region’s most valuable fisheries is for mutton snapper (Lutjanus analis), a coral-reef fish that uses various habitats throughout its life cycle, aggregates to spawn at specific places and times, and is considered vulnerable to extinction. This dissertation focuses on the mutton snapper spawning aggregation fishery at Gladden Spit, Belize (western Caribbean), which has existed since the 1950s. In 2000, the Government of Belize partnered with a community-based nongovernment organization, fishers, and other stakeholders to conserve and co-manage the artisanal fishery. Considering the study fishery as an adaptive socio-environmental fisher-fish system, this dissertation uses a holistic approach to provide baseline socioeconomic and biological information for strengthening conservation and management of mutton snapper fisheries in Belize, applicable to the rest of the Caribbean. The three overall goals of this dissertation were to 1) present the history of the fishery and delineate for the first time its socio-environmental development and impact on inter-annual catch dynamics and yields, using published and grey literature, knowledge of experienced fishers and stakeholders, and data from landings surveys; 2) characterize the fishery’s within-season dynamics in 2011 through analyses of the variability in fishing activity, catch and bycatch, and in size, age, and maturation of reproductive mutton snapper, and 3) evaluate the potential distribution of habitat for early life stages of mutton snapper across the Belize shelf, using a GIS-based multi-criteria modeling approach evaluated in the field. Inter-annual analyses evidenced a considerable reduction in total landings and fishing effort of the fishery in the late 1980s, parallel to a rapid growth in the tourism industry and to a shift in the livelihoods of many local fishers. Between 1999 and 2011, during the co-management period of the fishery, relatively stable values of annual catch per unit effort (CPUE), individual sizes, and sex ratios suggested persistence of the fishery. Otolith, size, and gonad analyses depicted, for the first time for the species, age-, size-, and maturation-structured mutton snapper spawning aggregations. Within-season analyses showed how mutton snapper size, age, and degree of maturation vary in relation to the lunar cycle and throughout the spawning season, with individuals significantly smaller and females mostly immature later in the season. Overall, the within-season dynamics of the fishery were influenced by the lunar and seasonal patterns in the reproductive biology of mutton snapper, interactions with co-occurring fisheries, and the experience and traditions of local fishers. The GIS-based model provided a common spatial framework for guiding conservation and spatial management of mutton snapper in Belize and highlighted a low degree of protection currently afforded to critical…
Advisors/Committee Members: Heyman, William D (advisor), Roark, Erin B (advisor), Houser, Chris (committee member), Rooker, Jay R (committee member), Stronza, Amanda (committee member).
Subjects/Keywords: Artisanal fisheries; Lutjanidae; Reef fish spawning aggregations; Data-poor fisheries; Socio-environmental systems; Age and gowth; GIS modeling
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APA (6th Edition):
Granados-Dieseldorff, P. (2013). The Mutton Snapper (Lutjanus analis) Spawning Aggregation Fishery at Gladden Spit, Belize: Inter-annual and Within-season Dynamics. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151808
Chicago Manual of Style (16th Edition):
Granados-Dieseldorff, Pablo. “The Mutton Snapper (Lutjanus analis) Spawning Aggregation Fishery at Gladden Spit, Belize: Inter-annual and Within-season Dynamics.” 2013. Doctoral Dissertation, Texas A&M University. Accessed April 19, 2021.
http://hdl.handle.net/1969.1/151808.
MLA Handbook (7th Edition):
Granados-Dieseldorff, Pablo. “The Mutton Snapper (Lutjanus analis) Spawning Aggregation Fishery at Gladden Spit, Belize: Inter-annual and Within-season Dynamics.” 2013. Web. 19 Apr 2021.
Vancouver:
Granados-Dieseldorff P. The Mutton Snapper (Lutjanus analis) Spawning Aggregation Fishery at Gladden Spit, Belize: Inter-annual and Within-season Dynamics. [Internet] [Doctoral dissertation]. Texas A&M University; 2013. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/1969.1/151808.
Council of Science Editors:
Granados-Dieseldorff P. The Mutton Snapper (Lutjanus analis) Spawning Aggregation Fishery at Gladden Spit, Belize: Inter-annual and Within-season Dynamics. [Doctoral Dissertation]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151808
4.
Wetmore, Lynne S.
Evaluation of Natural Markers to Assess Cross-Shelf Connectivity of MesoAmerican Reef Fish Populations in Belize.
Degree: MS, Wildlife and Fisheries Sciences, 2014, Texas A&M University
URL: http://hdl.handle.net/1969.1/152860
► Quantitative evaluations of early-life connectivity in reef fish populations are critical to the effective identification and management of productive nearshore nurseries. The present study evaluates…
(more)
▼ Quantitative evaluations of early-life connectivity in reef fish populations are critical to the effective identification and management of productive nearshore nurseries. The present study evaluates the use of natural markers in assessing both trophic and population connectivity for three species of snappers (Lutjanidae) utilizing back-reef nurseries in southern Belize: dog snapper (Lutjanus jocu), gray snapper (L. griseus), and schoolmaster (L. apodus). Juvenile snappers were collected from inner- and outer-shelf nurseries across two latitudinal regions in the Belize coastal lagoon in order to: (a) utilize tissue stable isotopes (δ^(13)C and δ^(15)N) as dietary tracers to characterize organic matter production across the continental shelf, and (b) evaluate the utility of otolith stable isotopes (δ^(13)C and δ^(18)O) as a marker of nursery origin.
Isosource models (based on tissue δ^(13)C and δ^(15)N) revealed distinct differences in food web dynamics between pristine nurseries and those influenced by heavily impacted watersheds. Juvenile snappers at pristine sites were supported by organic matter derived from both benthic sources (seagrass/benthic diatoms) and the water column (phytoplankton), while sites impacted by anthropogenic runoff displayed significant decreases in water column-based production during the rainy season, accompanied by significantly decreased juvenile snapper condition (muscle lipid content) for all three species. These results emphasize the high land-sea connectivity in this system and indicate that runoff from impacted watersheds has the potential to disrupt trophic production in nurseries across the continental shelf.
Otolith stable isotopes (δ^(13)C and δ^(18)O) appeared to be strongly related to salinity gradients within the Belize coastal lagoon and, consequently, showed considerable promise in identifying juvenile snappers to shelf position. Both isotopes were both consistently enriched in snappers from outer-shelf nurseries, where freshwater influence was minimal, and δ^(18)O was enriched in the northern sampling region, which receives lower amounts of freshwater input compared to the south. Although individuals of each species were classified to specific study sites with varying success (58-81%), discrimination to shelf position was consistently high for all species (74-92%), indicating that otolith δ^(13)C and δ^(18)O may be useful in determining relative contribution rates of juvenile snappers produced at inner- and outer-shelf nurseries within tropical back-reef systems.
Advisors/Committee Members: Rooker, Jay R (advisor), Gelwick, Frances P (committee member), Heyman, William D (committee member).
Subjects/Keywords: primary productivity; nursery production; trophic connectivity; seasonal food web dynamics; land-sea connectivity; anthropogenic runoff; nutrient enrichment; habitat quality; reef fish; Lutjanus; stable isotopes; Isosource
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APA (6th Edition):
Wetmore, L. S. (2014). Evaluation of Natural Markers to Assess Cross-Shelf Connectivity of MesoAmerican Reef Fish Populations in Belize. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/152860
Chicago Manual of Style (16th Edition):
Wetmore, Lynne S. “Evaluation of Natural Markers to Assess Cross-Shelf Connectivity of MesoAmerican Reef Fish Populations in Belize.” 2014. Masters Thesis, Texas A&M University. Accessed April 19, 2021.
http://hdl.handle.net/1969.1/152860.
MLA Handbook (7th Edition):
Wetmore, Lynne S. “Evaluation of Natural Markers to Assess Cross-Shelf Connectivity of MesoAmerican Reef Fish Populations in Belize.” 2014. Web. 19 Apr 2021.
Vancouver:
Wetmore LS. Evaluation of Natural Markers to Assess Cross-Shelf Connectivity of MesoAmerican Reef Fish Populations in Belize. [Internet] [Masters thesis]. Texas A&M University; 2014. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/1969.1/152860.
Council of Science Editors:
Wetmore LS. Evaluation of Natural Markers to Assess Cross-Shelf Connectivity of MesoAmerican Reef Fish Populations in Belize. [Masters Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/152860
5.
Kobara, Shinichi.
Regional Analysis of Seafloor Characteristics at Reef Fish Spawning Aggregation Sites in the Caribbean.
Degree: PhD, Geography, 2011, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7317
► Overfishing of stock and decreasing biodiversity are grave concerns for the U.S. and the rest of the world. Understanding and applying spatial and temporal information…
(more)
▼ Overfishing of stock and decreasing biodiversity are grave concerns for the U.S. and the rest of the world. Understanding and applying spatial and temporal information of marine species’ reproductive ecology and critical life habitat is vital to the development of effective strategies for marine resource management. In the Caribbean, one of the critical science gaps hindering effective management is the lack of information on how environmental factors may make fish spawning aggregation (FSA) sites optimal for spawning. Understanding the patterns of seafloor characteristics of spawning aggregation sites is of great interest to managers who need a means to efficiently design marine protected areas to help rebuild regional fish stocks.
The specific goals of the study were: (1) to map the seafloor at historically known grouper and snapper spawning aggregation sites in three different countries, and (2) to characterize quantitatively the geomorphology of the sites including horizontal and vertical curvature profiles of the reefs, bottom depth at spawning sites, distance between spawning sites and shelf-edges/reef promontory tips, and the shortest distance between the spawning sites and 100
m water depth. These data were field-collected with a GPS and single-beam eco-sounder that provided latitude/longitude and depth. The point data were interpolated to surfaces in GIS to determine slope, aspect, curvature, and distance from spawning sites and three-dimensional reef structures.
This study revealed that all 12 known Nassau grouper spawning aggregation sites in Belize and 5 known sites in the Cayman Islands were located at convex-shaped seaward extending reefs (reef promontories) jutting into deep water, within 1 km of reef promontory tips. However, spawning aggregations did not always occur at the tips of reef promontories, though all were found along the shelf edges within 1 km of promontory tips. Sixteen sites were multi-species spawning sites. These general characteristics were used to predict an undiscovered multi-species spawning aggregation in Belize. A successful prediction in Belize, together with the compiled data from multiple sites indicate: 1) reef promontories are vital locations for transient reef fish spawning aggregations, and 2) this study provides a potential tool for prediction of unknown spawning sites in the Caribbean.
Advisors/Committee Members: Heyman, William D. (advisor), Filippi, Anthony M. (advisor), Liu, Hongxing (committee member), Kjerfve, Björn (committee member).
Subjects/Keywords: Marine Protected Area; Essential Life Habitat; Spawning aggregation; Reef promontory; Grouper; Snapper; Multi-species
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APA (6th Edition):
Kobara, S. (2011). Regional Analysis of Seafloor Characteristics at Reef Fish Spawning Aggregation Sites in the Caribbean. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7317
Chicago Manual of Style (16th Edition):
Kobara, Shinichi. “Regional Analysis of Seafloor Characteristics at Reef Fish Spawning Aggregation Sites in the Caribbean.” 2011. Doctoral Dissertation, Texas A&M University. Accessed April 19, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7317.
MLA Handbook (7th Edition):
Kobara, Shinichi. “Regional Analysis of Seafloor Characteristics at Reef Fish Spawning Aggregation Sites in the Caribbean.” 2011. Web. 19 Apr 2021.
Vancouver:
Kobara S. Regional Analysis of Seafloor Characteristics at Reef Fish Spawning Aggregation Sites in the Caribbean. [Internet] [Doctoral dissertation]. Texas A&M University; 2011. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7317.
Council of Science Editors:
Kobara S. Regional Analysis of Seafloor Characteristics at Reef Fish Spawning Aggregation Sites in the Caribbean. [Doctoral Dissertation]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7317
6.
Carr, Liam.
Reducing Uncertainty in Fisheries Management: The Time for Fishers' Ecological Knowledge.
Degree: PhD, Geography, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11034
► This dissertation work presents a novel method for addressing system uncertainty to improve management of a small-scale fishery in St. Croix, United States Virgin Islands.…
(more)
▼ This dissertation work presents a novel method for addressing system uncertainty to improve management of a small-scale fishery in St. Croix, United States Virgin Islands. Using fishers' ecological knowledge (FEK), this research examines existing perspectives and biases through the Q-Method to identify regulatory inefficiencies in the management framework and strengthen the rationale for including fishers into the management process, develops a coupled behavior-economics model to predict the likelihood of fishing the preferred grounds under a range of physical and regulatory conditions, establishes a baseline assessment of a spawning aggregation of mutton snapper following sixteen years of protection through a no-take marine protected area, and conducts a discrete choice method test to examine likely public support for FEK-based proposed regulatory alternatives.
This work contributes to an under-studied and much-needed area of fisheries management, that of incorporating socioeconomic motivations within an ecosystem-based framework. As fisheries management efforts begin to embrace ecosystem-based approaches, the need for understanding and incorporating the knowledge and behavior of fishers into management has never been greater. Ecological goals of fishery sustainability and continued habitat function cannot be achieved without first understanding how fishers view and respond to any regulatory environment and then developing a framework that achieves the greatest support for those regulations. The time has come for incorporating FEK into ecosystem-based fisheries management.
Advisors/Committee Members: Heyman, William D. (advisor), Houser, Chris (committee member), Mangieri, Tina (committee member), Rooker, Jay (committee member), Waddell, Kim (committee member).
Subjects/Keywords: fisheries management; local ecological knowledge; data-poor fisheries, US Virgin Islands
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APA (6th Edition):
Carr, L. (2012). Reducing Uncertainty in Fisheries Management: The Time for Fishers' Ecological Knowledge. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11034
Chicago Manual of Style (16th Edition):
Carr, Liam. “Reducing Uncertainty in Fisheries Management: The Time for Fishers' Ecological Knowledge.” 2012. Doctoral Dissertation, Texas A&M University. Accessed April 19, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11034.
MLA Handbook (7th Edition):
Carr, Liam. “Reducing Uncertainty in Fisheries Management: The Time for Fishers' Ecological Knowledge.” 2012. Web. 19 Apr 2021.
Vancouver:
Carr L. Reducing Uncertainty in Fisheries Management: The Time for Fishers' Ecological Knowledge. [Internet] [Doctoral dissertation]. Texas A&M University; 2012. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11034.
Council of Science Editors:
Carr L. Reducing Uncertainty in Fisheries Management: The Time for Fishers' Ecological Knowledge. [Doctoral Dissertation]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11034
Texas A&M University
7.
Hunt, Luciana E.
Characterization of Habitat for Hawksbill Turtle (Eretmochelys imbricata) in Los Roques Archipelago National Park, Venezuela.
Degree: MS, Geography, 2010, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-6985
► Information on the locations for feeding, reproductions, and resting, are essential to effectively protect sea turtle populations and implement conservation efforts. This type of ecological…
(more)
▼ Information on the locations for feeding, reproductions, and resting, are essential
to effectively protect sea turtle populations and implement conservation efforts. This
type of ecological information is critically important for hawksbill turtle conservation in
Los Roques Archipelago National Park (LRANP) where turtles have been declining in
spite of habitat protection efforts. The goal of this research was to produce a benthic
habitat map of LRANP employing in situ visual surveys, remote sensing and geographic
information system techniques, and to spatially characterize sea turtle occupancy and
patterns of usage by habitat type. Between June and August of 2008, turtle behavior and
habitat use were recorded during 159 h of observation, comprising 46 sighting events (n
= 20 juveniles, n = 26 female adults). Observed activities were grouped into 4
categories: foraging, resting, swimming, and reproductive behavior. The benthic habitat
at each turtle sighting was recorded as one of three categories: coral reef, sand or marine
vegetation. Results suggest that the population of turtles within LRANP is comprised
primarily of female adults and juvenile individuals and that coral reef is the most
important habitat for this species. The most important foraging area in the atoll is a coral patch reef that connects Dos Mosquises Sur and Dos Mosquises Norte. The data in this
thesis have been made available in digital and map form to the managers of LRANP for
management purposes.
Advisors/Committee Members: Heyman, William D. (advisor), Liu, Hongxing (committee member), Fitzgerald, Lee A. (committee member), Posada, Juan (committee member).
Subjects/Keywords: Eretmochelys imbricata; Hawksbill turtle; habitat characterization
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APA (6th Edition):
Hunt, L. E. (2010). Characterization of Habitat for Hawksbill Turtle (Eretmochelys imbricata) in Los Roques Archipelago National Park, Venezuela. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-6985
Chicago Manual of Style (16th Edition):
Hunt, Luciana E. “Characterization of Habitat for Hawksbill Turtle (Eretmochelys imbricata) in Los Roques Archipelago National Park, Venezuela.” 2010. Masters Thesis, Texas A&M University. Accessed April 19, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-6985.
MLA Handbook (7th Edition):
Hunt, Luciana E. “Characterization of Habitat for Hawksbill Turtle (Eretmochelys imbricata) in Los Roques Archipelago National Park, Venezuela.” 2010. Web. 19 Apr 2021.
Vancouver:
Hunt LE. Characterization of Habitat for Hawksbill Turtle (Eretmochelys imbricata) in Los Roques Archipelago National Park, Venezuela. [Internet] [Masters thesis]. Texas A&M University; 2010. [cited 2021 Apr 19].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-6985.
Council of Science Editors:
Hunt LE. Characterization of Habitat for Hawksbill Turtle (Eretmochelys imbricata) in Los Roques Archipelago National Park, Venezuela. [Masters Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-6985
. 
Open Access Theses and Dissertations
