História Natural e Análise Citogenética de Micrurus frontalis (Duméril, Bibron & Duméril, 1854) (Serpentes: Elapidae)

• Autor(a) principal: Silva, Carolina Coelho Augusto
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/2287
• topic: Serpentes; Cobra-coral verdadeira; Micrurus frontalis; História natural; Morfologia; Citogenética; Snakes; Real coral snake; Micrurus frontalis; Natural history; Morphology; Cytogenetics; CNPQ::CIENCIAS BIOLOGICAS::ZOOLOGIA

Micrurus frontalis (Duméril, Duméril & Bibron, 1854) is distributed along the Cerrado of central Brazil, Paraguay, and in the Atlantic Forest of southeastern Brazil, reaching the coastal region only in Espirito Santo. Information about its natural history (especially diet and reproduction) are scarce, as for most tropical coral snakes. Fourteen species of the genus Micrurus have the karyotype described and only four reach Brazil throughout its distribution. Aiming to enhance existing knowledge of natural history, patterns of morphological variation and to better understand the genome evolution, this work provides data on the diet, seasonal activity, reproduction, morphological variation and for the first time the karyotype description and characterization of M. frontalis from Viçosa (20 ° 45 ' S , 42 ° 52' W), Minas Gerais, southeastern Brazil, using the techniques of AgNOR, C Band, DAPI, CMA3 and fluorecence in situ hybridization (FISH). The diet of M. frontalis consists of serpentine reptiles, mainly fossorial or cryptozoic species and it has a long period of vitellogenesis, whereas females with vitelogenic follicles were found in all seasons, except in spring. The peack of activety happens in the rainy season, during which most adults had stomach contents. Micrurus frontalis has a diploid number of chromosome 2N = 42, fundamental number FN = 24 and karyotype formula for females 42 (1sm + 1st + 20t + 20mc) and for males 42(2sm + 20t + 20mc) The W chromosome has the long arm almost entirely heterochromatic and rich in satellite DNA. The fourth pair of telocentric chromosomes showed homozygous and heterozygous patterns in relation to C-Band and satellite DNA.