Please use this identifier to cite or link to this item: http://repositorio.ufpa.br/jspui/handle/2011/5465
metadata.dc.type: Artigo de Periódico
Title: Geographical variation in the reproduction and sexual dimorphism of the Boddaert's tropical racer, Mastigodryas boddaerti (Serpentes: Colubridae)
metadata.dc.creator: SIQUEIRA, Débora Mendes
NASCIMENTO, Loana Pastana
MONTINGELLI, Giovanna Gondim
COSTA, Maria Cristina dos Santos
Abstract: We obtained data on time of sexual maturity, dimorphism, fecundity and on the reproductive cycle of Mastigodryas boddaerti (Sentzen, 1796) through the examination of 321 preserved specimens, of which 221 were collected in the Brazilian Amazon region and 100 in the Cerrado savannas of Central Brazil. The degree of sexual size dimorphism (snout-vent length, SVL) was significantly greater in the specimens from the Cerrado in comparison with those from the Amazon. Females had a significantly larger number of ventral scales, on average, whereas males had more sub-caudal scales. However, there was no intersexual difference in tail length or head width, although the heads of the males were significantly longer, which may reflect dietary differences. Breeding females from the Amazon region contained between one and six eggs (N = 12, mean = 3.0), whereas two females from the Cerrado had four to six eggs (N = 10, mean = 5.0). No relationship was found between the SVL of the Amazonian females and the number of eggs or vitellogenic follicles they contained (Cerrado females were not analyzed here due to small sample size). Males are smaller than their female counterpart when they reach sexual maturity. Even though females from the Amazon reproduce throughout the year, females from the Cerrado breed seasonality.
Keywords: Réptil
Cobra
Biogeografia
Reprodução animal
Características sexuais
Morfologia
Mastigodryas boddaerti
Cerrados
Amazônia Brasileira
ISSN: 1984-4670
Citation: SIQUEIRA, Débora M. et al. Geographical variation in the reproduction and sexual dimorphism of the Boddaert's tropical racer, Mastigodryas boddaerti (Serpentes: Colubridae). Zoologia (Curitiba), Curitiba, v. 30, n. 5, p. 475-481, out. 2013. Disponível em: <http://www.scielo.br/pdf/zool/v30n5/02.pdf>. Acesso em: 12 mar. 2014. <http://dx.doi.org/10.1590/S1984-46702013000500002>.
URI: http://repositorio.ufpa.br/jspui/handle/2011/5465
Issue Date: Oct-2013
Appears in Collections:Artigos Científicos - ICB

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