Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.12/1333
Título: Androgenization of dominant males in a cichlid fish: Androgens mediate the social modulation of sexually dimorphic traits
Autor: Oliveira, Rui Filipe
Almada, Vítor Carvalho
Data: 1998
Editora: Blackwell Verlag
Citação: Ethology, 104, 841-858
Resumo: We present data on the relationship between social status and male secondary sex traits, both morphological and ethological, in Oreochromis mossambicus at the onset of sexual maturation. There is a differential expression of morphological (dorsal fin height, anal fin height, mandible width and premaxilla length) and behavioural (nuptial coloration, per cent time defending a territory, spawning pit volume, pit hovering and courtship rate) traits according to social status, with dominants presenting the highest expression of these dimorphic traits. Social status also affects the development of the genital papillae, which is considered to be a good predictor of androgen levels in cichlid fishes. The results support a causal model in which social status modulate androgen levels that in turn modulate the expression of behavioural and morphological male traits.
Peer review: yes
URI: http://hdl.handle.net/10400.12/1333
ISSN: 0179-1613
Aparece nas colecções:UIE-E - Artigos em revistas internacionais

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