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| Author(s): |
Daniel Rodrigues Stuginski
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) |
| Defense date: | 2014-06-13 |
| Examining board members: |
Jose Eduardo Pereira Wilken Bicudo;
José Eduardo de Carvalho;
Fernando Ribeiro Gomes;
Marcio Roberto Costa Martins;
Ricardo Jannini Sawaya
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| Advisor: | Jose Eduardo Pereira Wilken Bicudo |
| Abstract | |
The viperids are among the snakes with the lowest energetic maintenance costs which are generally related to the low mobility and ambush foraging mode. Two important components of energy allocation in these animals are 1) standard metabolic rates (SMR), related to the cost of keeping visceral components during resting and 2) specific dynamic action (SDA) , which is related to the cost of digestion. The present work aimed to study the variations of SMR and SDA in 5 species of the genus Bothrops taking into account aspects of phylogeny and ontogeny plus testing hypotheses about possible variations in these metabolic rates related to ecological characteristics. Furthermore, the present study used phylogenetic weighting tools to test the currently accepted hypothesis that predicts that SMR in snakes is related to the feeding strategy and not to phylogeny. The work is divided into four different chapters. Chapter 1 is devoted to a general introduction about the issues that will be addressed in the others chapters. The results and discussions are divided into two chapters presented as articles, the first referring to studies of SMR ( chapter 2 ) and the second to the SDA (chapter 3 ). Finally, in chapter 4 we include the final conclusion and prospects for future research (AU) | |