Revista de Biología Tropical ISSN Impreso: 0034-7744 ISSN electrónico: 2215-2075

OAI: https://revistas.ucr.ac.cr/index.php/rbt/oai
Sexual dimorphism in <i>Ramphastos toco</i> and <i>Ramphastos dicolorus</i> (Piciformes, Aves)
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Keywords

sexual dimorphism
ramphastos
ramphastidae

How to Cite

Castro, M. S., Recco-Pimentel, S. M., & Rocha, G. T. (2003). Sexual dimorphism in <i>Ramphastos toco</i> and <i>Ramphastos dicolorus</i> (Piciformes, Aves). Revista De Biología Tropical, 51(1), 241–246. Retrieved from https://revistas.ucr.ac.cr/index.php/rbt/article/view/15663

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, capitive bird breeders can determine sex of R. toco specimens by phenotypic analysis and form breeding couples more quickly.
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