Atividade diária de dipsadídeos neotropicais

• Autor(a) principal: Torello-Viera, Natália Ferreira [UNESP]
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/110982
• topic: Ecologia animal; Cobra; Animais - Comportamento; Conservação biológica; História natural; Snakes

Daily activity is an understudied aspect among Neotropical snakes. This region possesses high species richness, and bears an extremely diverse ecology. In this context, the present study sought to provide information on activity patterns of several species of dipsadids, which is the most diverse group of snakes at the neotropical region. A total of 49 individuals were observed, comprising nine species, from different lineages: Atractus pantostictus and Sibynomorphus mikanii, Apostolepis assimilis, Erythrolamprus aesculapii, and Liophis miliaris, Oxyrhopus guibei, Philodryas patagoniensis, and Tomodon dorsatus and Thamnodynastes strigatus. The specimens were housed in captivity for 10 consecutive days and monitored by CCTV system. Most species presented predominantly diurnal activity, except A. pantostictus, S. mikanii and O. guibei. Apostolepis assimilis, L. miliaris and O. guibei showed bimodal activity pattern, as specimens of E. aesculapii individually presented two daily peaks of activity, even so the time of such peaks has differed among the individuals. The analysis of similarity suggests that the pattern of activity is preserved in some groups (E. aesculapii and L. miliaris, tribe Xenodontini, and the Dipsadini A. pantostictus and S. mikanii). Availability of food in the natural environment and climatic factors also seem to influence activity, beyond the reproductive state, and ontogenetic variation