Sexual dimorphism in Ramphastos toco and Ramphastos dicolorus (Piciformes, Aves)
Rev. biol. trop
;
51(1): 241-245, mar. 2003. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-365961
ABSTRACT
Phenotypic sexual dimorphism seems to be rare in the Ramphastidae family, except in Pteroglossus viridis and in the genus Selenidera. Many breeders of wild birds believe that specimens of Ramphastos toco can be sexed using bill characteristics. In this study, various discriminant phenotypic variables were analyzed in birds which were sexed cytogenetically. Fifty-one specimens of R. toco and 20 R. dicolorus were studied. The statistically significant parameters which served to distinguish the sex in these species were the length of the culmen and tomium, length of the lower corneous beak and the cloaca. Using these parameters, captive bird breeders can determine sex of R. toco specimens by phenotypic analysis and form breeding couples more quickly.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Fenótipo
/
Bico
/
Aves
/
Caracteres Sexuais
Limite:
Animais
Idioma:
Inglês
Revista:
Rev. biol. trop
Assunto da revista:
Biologia
/
Medicina Tropical
Ano de publicação:
2003
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Estadual Paulista/BR
/
Universidade Estadual de Campinas/BR
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