Sexual dimorphism in the South American water snake Helicops polylepis (Serpentes: Dipsadidae)
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چکیده
منابع مشابه
Sexual dimorphism in venom of Bothrops jararaca(Serpentes: Viperidae).
Bothrops jararaca is an abundant snake in Brazil, and its venom has been studied exhaustively. The species exhibits adult size dimorphism in which female are larger. We registered the growth in Snout-Vent Length and weight of one litter (with 11 females and 12 males). We compared growth curves and venom profile between male and female of B. jararaca in order to establish the relationship of tho...
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Hypotheses for the origin and maintenance of sexual size dimorphism (SSD) fall into three primary categories: (i) sexual selection on male size, (ii) fecundity selection on female size and (iii) ecological selection for gender-specific niche divergence. We investigate the impact of these forces on SSD evolution in New World pitvipers (Crotalinae). We constructed a phylogeny from up to eight gen...
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aLaboratório de Vertebrados, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande – FURG, Av. Itália, Km 8, Vila Carreiros, CEP 96203-900, Rio Grande, RS, Brazil bLaboratório Especial de Coleções Zoológicas, Instituto Butantan, Av. Vital Brasil, 1500, CEP 05503-900, São Paulo, SP, Brazil cLaboratório de Herpetologia, Universidade Federal de Santa Maria – UFSM, Av. Roraima, 1000,...
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There is conflicting evidence as to whether water drinking elicits a pressor response in healthy young adults. The inclusion of a variable number of women may have contributed to the discrepancies found in past research. Thus, we aimed at exploring whether the osmopressor response follows a sexually dimorphic pattern. In a randomized fashion, 31 healthy adults (16 men; 15 women, aged 18-40 year...
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ژورنال
عنوان ژورنال: Phyllomedusa: Journal of Herpetology
سال: 2021
ISSN: 2316-9079,1519-1397
DOI: 10.11606/issn.2316-9079.v20i1p15-25