2013-09-162013-09-162007-05RODRIGUES, Francílio da Silva. Taxocenose de serpentes (Squamata: Serpentes) em uma área de transição cerrado-caatinga no município de Castelo do Piauí, Piauí, Brasil. 2007. 103 f. Dissertação (Mestrado) - Universidade Federal do Pará, Museu Paraense Emílio Goeldi, Belém, 2007. Programa de Pós-Graduação em Zoologia.https://repositorio.ufpa.br/handle/2011/4249A survey of the snake fauna in a transition area between Cerrado and Caatinga in the municipal district of Castelo do Piauí was made. Six trips were accomplished between October, 2005 and July, 2006, in three vegetation types: Rocky Savanna, Open Savanna and secondary growth of Tipical Savanna, totalizing 120 days of field work. Three methods were used: Pitfall traps with drift fences, Time Constrained Search and Occasional Encounters. Eighteen species were registered. As expected for the South American formations, Colubridae presented the greatest species richness. The community is predominantly composed by Xenodontinae (11 species), following by Colubrinae (Mastigodryas bifossatus and Spilotes pullatus) and a single species of Dipsadinae (Leptodeira annulata), reflecting the community structure and the evolutionary pattern of the colubrids phylogenetic lineages. Thamnodynastes sp. (n = 7), Philodryas nattereri (n = 5) and Phimophis iglesiasi (n = 5) were the most abundant species in the studied area, different from others formations of snake communities in Brazil which are dominated by Viperidae. The richness estimators Chao 2 and Jack1 indicate that the community is composed by nearly 24 species. Time Constrained Search was the most effective method, although it is recommended the use of the three methods for a more complete snake survey. It was demonstrated the predominance of terrestrials, diurnals, oviparous snakes, which probably feeds on amphibians and lizards. The Principal Coordinates Analysis, cluster analysis, similarity indices and distribution patterns of the species between the biomes, shows that the studied area is more similar to open areas (Cerrado, Caatinga e Pantanal) that to forest formations, reforcing the idea that the snake community of Castelo do Piauí suffers direct faunistical influence from the Cerrado and Caatinga biomes. This data are congruent with those from flora studies, and point preferential association to Caatinga communities. The PCO and cluster analysis suggests that the hypothesis of mixed composition of Cerrado and Caatinga faunas, as pointed in other studies, is based on misinterpreted data.porAcesso AbertoRéptilCobraBiogeografiaComposição de serpenteCerradosCaatingaCastelo do Piauí - PIPiauí - EstadoDissertaçãoCNPQ::CIENCIAS BIOLOGICAS::ZOOLOGIA::TAXONOMIA DOS GRUPOS RECENTES