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| Author(s): |
Lucas Henrique Carvalho Siqueira
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São José do Rio Preto. 2016-04-27. |
| Institution: | Universidade Estadual Paulista (Unesp). Instituto de Biociências Letras e Ciências Exatas. São José do Rio Preto |
| Defense date: | 2016-03-28 |
| Advisor: | Otavio Augusto Vuolo Marques |
| Abstract | |
Maintenance of suitable habitat is essential for animal population persistence. Quantitative and qualitative alterations in the environment may generate serious ecological consequences. One of the most common causes of alterations in quality, habitable area decrease and isolation is the forest fragmentation carried by urbanization. Forest remnants can function as oceanic islands, and the resident animal species may show morphological variation like dwarfism or gigantism, caused generally by the modification of diet and/or predator incidence. Here, we investigate the body size, prey availability and predation pressure in populations of Bothrops jararaca in two parks subject to different urbanization degree. We found no differences in snakes length, neither stoutness between the two populations. However the prey availability and predator incidence was significantly higher in the park with less urban influence. The results suggest that smaller food availability offer in the isolated urban park did not decrease significantly B. jararaca growth rate, but the lesser predators incidence can result in longer lifetime and consequently higher proportion of snakes with superior body length. (AU) | |
| FAPESP's process: | 14/11909-2 - Urbanization effects on a Bothrops jararaca population |
| Grantee: | Lucas Henrique Carvalho Siqueira |
| Support Opportunities: | Scholarships in Brazil - Master |