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Title: Reproductive patterns of Trachycephalus venulosus (Laurenti, 1768) and Scinax fuscovarius (Lutz, 1925) from the Cerrado, Central Brazil
Authors: Rodrigues, Domingos de Jesus
Uetanabaro, Masao
Lopes, Frederico Santos
Keywords: Amphibian
Body Size
Egg Production
Environmental Factor
Reproductive Strategy
Sexual Dimorphism
South America
Western Hemisphere
Scinax Fuscovarius
Issue Date: 2005
metadata.dc.publisher.journal: Journal of Natural History
metadata.dc.relation.ispartof: Volume 39, Número 35, Pags. 3217-3226
Abstract: Animal mating systems are moulded by ecological factors, mainly the temporal patterns of reproduction. We report the reproductive period, use of microhabitats, clutch and egg sizes, reproductive efforts, occurrence of sexual size dimorphism, and the relation between body size and fecundity in the gravid females of Trachycephalus venulosus and Scinax fuscovarius at Serra da Bodoquena, Central Brazil. The reproduction of both species was correlated with the rainy season. Females of T. venulosus produced more eggs and their eggs were larger than those of S1. fuscovarius. The females of both species were larger and heavier than males. The reproductive effort was measured as the ratio of gonad mass in relation to body mass. Females of both species presented similar reproductive efforts, but males of S. fuscovarius invested more in gonads compared to males of T. venulosus. Trachycephalus venulosus presented significant correlation between snout-vent length versus number of mature eggs and body mass versus number of mature eggs and ovarian mass. Scinax fuscovarius showed significant correlation between body mass versus ovarian mass. Trachycephalus venulosus is an explosive breeder, whereas S. fuscovarius has prolonged reproduction. These species are able to adapt to several types of habitat, due to behavioural and physiological plasticity. © 2005 Taylor & Francis.
metadata.dc.identifier.doi: 10.1080/00222930500312244
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