masterThesis
Ecologia trófica de uma comunidade de lagartos da caatinga
Fecha
2013-06-21Registro en:
MACÊDO, Pedro de Farias Capistrano. Ecologia trófica de uma comunidade de lagartos da caatinga. 2013. 100f. Dissertação (Mestrado em Ecologia) - Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, 2013.
Autor
Macêdo, Pedro de Farias Capistrano
Resumen
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.