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Previous issue date: 2013-06-21 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / A ecologia tr?fica estuda assuntos relacionados ? dieta dos indiv?duos dentro de uma
comunidade. A rela??o entre tamanho corporal do predador e o tamanho da presa, a
especializa??o individual e a largura de nicho s?o alguns dos assuntos que podem ser
explorados por ela. Realizei coletas de lagartos utilizando armadilha de queda, de cola e
coleta ativa em um fragmento de Caatinga. As esp?cies mais comuns nesta comunidade
foram Tropidurus hispidus, Tropidurus semitaeniatus e Cnemidophorus ocellifer. Incurs?es ?
fazenda tamb?m contaram com coletas de invertebrados em cada esta??o para entender como
se apresentavam os recursos alimentares dos lagartos nas esta??es coletadas. Procurei
responder algumas perguntas: 1) Se haveria rela??o positiva entre a rela??o corporal do
predador e da presa da comunidade; 2) Se em diferentes esta??es a rela??o do tamanho
corporal do predador e o tamanho m?ximo e/ou m?nimo da presa seria positiva; 3) Se
esp?cies com estrat?gias de forrageio distintas teriam rela??o positiva na rela??o tamanho do
predador-presa; 4) Se a sazonalidade influenciaria a especializa??o individual na comunidade
de lagartos e esp?cies mais comuns; 5) Se a largura do nicho seria influenciada pela
sazonalidade; 6) Se indiv?duos com morfologia mais diferentes entre si apresentariam dieta
menos similar. Encontrei que houve realmente uma rela??o positiva entre tamanho da presa e
do predador, mas inexistente quanto ao tamanho m?nimo das presas; Entre as esta??es a
rela??o tamanho dos predadores e presas foi diferente para o tamanho m?ximo e m?nimo, mas
foi positivamente relacionado apenas com o tamanho do m?ximo das presas. E as
compara??es entre estrat?gias de forrageio diferentes tiveram as inclina??es da reta m?xima e
m?nima maiores que zero e diferentes uma da outra; a especializa??o individual n?o foi
influenciada pela sazonalidade e a largura de nicho apenas para T. semitaeniatus teve o nicho
mais amplo na esta??o seca. Por fim n?o encontrei rela??o negativa significativa entre
dissimilaridade morfol?gica e similaridade da dieta. / The trophic ecology studies issues related to the diet of individuals within a community .The
relation between the body size of the predator and the prey size, individual specialization and
niche breadth are some of the issues that can be discussed by it .I collected the lizards using
pitfall trap, glue and active collecting traps in a fragment of Caatinga. The most common
species in this community were Tropidurus hispidus, T. semitaeniatus and Cnemidophorus
ocellifer. The visits to the farm also relied on collecting invertebrates at each season to
understand how the nutritional resources of lizards were presented in each one of them. I tried
to answer some questions : 1) If there was a positive relation between body size of the
predator and the size of prey of the community ; 2) If in different seasons the relation of body
size of the predator and the maximum and/or minimum size of the prey would be positive ; 3)
If species with different foraging strategies have positive relation on the size of the predatorprey
relation; 4) If the seasonality would influence on the individual expertise of lizards
community and more common species; 5) If the breadth of the niche would be influenced by
seasonality ; 6) If more individuals with different morphology between them would present
less similar diet. I found that there was indeed a positive relationship between size of prey
and predator, but nonexistent related to the minimum size of prey; Among the seasons
relative size of predators and prey was different for the maximum and minimum size, but was
positively related only to the size of the maximum prey. And comparisons between different
foraging strategies had the maximum and minimum line inclination greater than zero and
different from each other; individual specialization was not influenced by seasonality and the
niche breadth was wider in the dry season only to T. semitaeniatus. At last I didn't find a
significant negative relationship between morphological dissimilarity and similarity of diet.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19984 |
| Date | 21 June 2013 |
| Creators | Mac?do, Pedro de Farias Capistrano |
| Contributors | 90773306153, http://lattes.cnpq.br/2151112850152895, Fonseca, Carlos Roberto Sorensen Dutra da, 75617633791, http://lattes.cnpq.br/2567786500828682, Colli, Guarino Rinaldi, 50648616649, http://lattes.cnpq.br/2272000258230548, Vasconcellos, Alexandre, Costa, Gabriel Corr?a |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM ECOLOGIA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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