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University: Universidade de Lisboa  Language: English

You searched for subject:(COMPORTAMENTO ALIMENTAR). Showing records 1 – 3 of 3 total matches.

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Universidade de Lisboa

1. Dias, Maria Ana Figueiredo Peixe, 1976-. Factors affecting the use of estuarine areas by waders : implications for their conservation.

Degree: 2009, Universidade de Lisboa

Tese de doutoramento em Biologia (Ecologia) apresentada à Universidade de Lisboa através da Faculdade de Ciências, 2009

Estuarine intertidal flats are amongst the most important habitats for waders during the non-breeding season. These environments face increasing pressures from human activities, which are contributing to a general decline in wader populations. It is therefore essential to know the factors driving the use of intertidal flats by wintering waders, particularly their implications to the conservation of these species. The analysis of such factors was the main focus of this thesis, what was attained by answering several specific questions related with the use of sediment flats at different spatial scales, using the waders wintering in Tagus estuary as model. It was demonstrated that dunlins Calidris alpina avoid performing long flights between roost sites and foraging grounds, what highlights the importance of the maintenance of a network of good-quality roosts for waders in estuarine areas. It was also shown that species vary in their response to the tidal movement, what has large implications in the estimates of use of tidal areas. Upper tidal flats (which are under considerable threat due to their proximity to shoreline) proved to be particularly important in providing food resources for waders. The fine scale use of tidal areas was studied by testing several predictions related with the searching behaviour of waders. It was shown that only tactile species, as black-tailed godwits Limosa limosa, are expected to present an arearestricted search, a type of movement usually adopted by foragers in clumpy environments. Finally, it was evaluated the impacts of traditional shellfishing on waders. Current levels of shellfishing seem to be compatible with the preservation of the Tagus estuary as a key site for waders, but the predictable increase in disturbance due to urban expansion in the vicinity of the Tagus estuary can result in serious impacts on some wader species.

Fundação para a Ciência e Tecnologia (SFRH/BD/19313/2004); projectos Sat-Tagis (PDCTM/C/MAR/15256/1999) e Pred-Tagis (POCTI/BSE/47569/2002)

Advisors/Committee Members: Palmeirim, Jorge Manuel Mestre, 1950-, Granadeiro, José Pedro.

Subjects/Keywords: Estuários; Comportamento alimentar; Límicolas

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Dias, Maria Ana Figueiredo Peixe, 1. (2009). Factors affecting the use of estuarine areas by waders : implications for their conservation. (Thesis). Universidade de Lisboa. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ul.pt:10451/1590

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):

Dias, Maria Ana Figueiredo Peixe, 1976-. “Factors affecting the use of estuarine areas by waders : implications for their conservation.” 2009. Thesis, Universidade de Lisboa. Accessed August 08, 2020. http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ul.pt:10451/1590.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Dias, Maria Ana Figueiredo Peixe, 1976-. “Factors affecting the use of estuarine areas by waders : implications for their conservation.” 2009. Web. 08 Aug 2020.

Vancouver:

Dias, Maria Ana Figueiredo Peixe 1. Factors affecting the use of estuarine areas by waders : implications for their conservation. [Internet] [Thesis]. Universidade de Lisboa; 2009. [cited 2020 Aug 08]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ul.pt:10451/1590.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dias, Maria Ana Figueiredo Peixe 1. Factors affecting the use of estuarine areas by waders : implications for their conservation. [Thesis]. Universidade de Lisboa; 2009. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ul.pt:10451/1590

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Universidade de Lisboa

2. Santos, Carlos David, 1976-. The use of interdital areas by foraging waders:constraints on the exploitation of food resources.

Degree: 2009, Universidade de Lisboa

Tese de doutoramento, Biologia (Ecologia), 2009, Universidade de Lisboa, Faculdade de Ciências

Disponível no documento

Fundação para a Ciência e a Tecnologia (SFRH/BD/16991/2004) and the research projects POCTI/BSE/47569/2002 and PTDC/MAR/66319/2006.

Advisors/Committee Members: Granadeiro, José Pedro.

Subjects/Keywords: Comportamento alimentar; Alimentação nocturna; Aves limícolas; Estuários; Teses de doutoramento

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Santos, Carlos David, 1. (2009). The use of interdital areas by foraging waders:constraints on the exploitation of food resources. (Thesis). Universidade de Lisboa. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ul.pt:10451/1625

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):

Santos, Carlos David, 1976-. “The use of interdital areas by foraging waders:constraints on the exploitation of food resources.” 2009. Thesis, Universidade de Lisboa. Accessed August 08, 2020. http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ul.pt:10451/1625.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Santos, Carlos David, 1976-. “The use of interdital areas by foraging waders:constraints on the exploitation of food resources.” 2009. Web. 08 Aug 2020.

Vancouver:

Santos, Carlos David 1. The use of interdital areas by foraging waders:constraints on the exploitation of food resources. [Internet] [Thesis]. Universidade de Lisboa; 2009. [cited 2020 Aug 08]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ul.pt:10451/1625.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Santos, Carlos David 1. The use of interdital areas by foraging waders:constraints on the exploitation of food resources. [Thesis]. Universidade de Lisboa; 2009. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ul.pt:10451/1625

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Universidade de Lisboa

3. Martins, Ricardo Jorge Pais da Costa. Wintering and migrating populations of dunlin calidris alpina using the tagus estuary : foraging ecology, behaviour and distribution.

Degree: 2015, Universidade de Lisboa

Tese de doutoramento, Biologia (Ecologia), Universidade de Lisboa, Faculdade de Ciências, 2015

Waders typically perform long-distance migrations between breeding and wintering areas, depending on a network of stopover sites to refuel along their flyway. Most wetlands act both as wintering and stopover areas for different wader populations and their distinct ecological constrains might lead them to different patterns of resource use, which is important information to plan conservation. The main aim of this thesis was to investigate the foraging ecology, behaviour and distribution of wintering and northward migrating dunlins Calidris alpina in the Tagus estuary, Portugal. These populations contrasted in diet, foraging behaviour and distribution. Differences in diet and foraging behaviour were explained by marked seasonal variations in prey availability. The improved feeding conditions for migrants presumably enabled high fattening rates, which highlight the good quality of the foraging habitats of the Tagus estuary for waders in stopover. In terms of distribution, unlike wintering dunlins, migrants avoided the areas of the estuary with higher perceived (but not real) risk of predation, despite their higher abundance of invertebrates. The distinct ecological constrains of these populations (e.g. in time and knowledge of the estuary) likely explains this pattern, as migrants are especially conservative in terms of predation risk when selecting foraging areas. In this thesis, the temporal overlap of wintering and migrating dunlins using the estuary in late winter/spring was investigated. This was done by determining departure dates of wintering birds, with radio-tracking, and through the innovative analysis of stable isotopes from toenails to unveil the wintering origins of birds using the estuary in migratory periods. This method confirmed the Banc d’Arguin, Mauritania, as the prime wintering area of birds that stopover at the Tagus estuary. To assist these studies, a new method to capture shorebirds was developed, where a crossbow is used to pull a mist-net over flocks of roosting birds.

Advisors/Committee Members: Palmeirim, Jorge M., 1957-, Granadeiro, José Pedro, 1964-.

Subjects/Keywords: Aves limícolas; Pilrito-comum; Aves migrantes; Comportamento alimentar; Isótopos estáveis; Estuário do Tejo; Teses de doutoramento - 2015; Domínio/Área Científica::Ciências Naturais::Ciências Biológicas

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Martins, R. J. P. d. C. (2015). Wintering and migrating populations of dunlin calidris alpina using the tagus estuary : foraging ecology, behaviour and distribution. (Thesis). Universidade de Lisboa. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ul.pt:10451/20607

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):

Martins, Ricardo Jorge Pais da Costa. “Wintering and migrating populations of dunlin calidris alpina using the tagus estuary : foraging ecology, behaviour and distribution.” 2015. Thesis, Universidade de Lisboa. Accessed August 08, 2020. https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ul.pt:10451/20607.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Martins, Ricardo Jorge Pais da Costa. “Wintering and migrating populations of dunlin calidris alpina using the tagus estuary : foraging ecology, behaviour and distribution.” 2015. Web. 08 Aug 2020.

Vancouver:

Martins RJPdC. Wintering and migrating populations of dunlin calidris alpina using the tagus estuary : foraging ecology, behaviour and distribution. [Internet] [Thesis]. Universidade de Lisboa; 2015. [cited 2020 Aug 08]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ul.pt:10451/20607.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Martins RJPdC. Wintering and migrating populations of dunlin calidris alpina using the tagus estuary : foraging ecology, behaviour and distribution. [Thesis]. Universidade de Lisboa; 2015. Available from: https://www.rcaap.pt/detail.jsp?id=oai:repositorio.ul.pt:10451/20607

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.