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The effect of nest aggregation on the reproductive behaviour of the peacock blenny Salaria pavo
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Orientador(es)
Resumo(s)
The effect of nest aggregation in courtship behaviour was tested experimentally in an
ecologically constrained, sex-role reversed population of the peacock blenny Salaria pavo. Mixed sex groups of eight males and eight females were tested in experimental tanks, containing eight potential nests either aggregated or dispersed. In the aggregated treatment, males spent more time inside their nests and monopolized other potential nests, causing a female-biased
operational sex ratio (OSR). In the aggregated treatment, females also expressed more courtship behaviour. The results in general support the prediction that the aggregation of nests promotes male monopolization of potential nests, resulting in fewer nest-holding males and therefore
a female-biased OSR that leads to the reversal of sex roles.
Descrição
Palavras-chave
Operational sex ratio Sex roles Resource monopolization Ria Formosa
Contexto Educativo
Citação
Saraiva, J. L.; Oliveira, R. F.; Barata, E. N.; Canário, A. V. M. The effect of nest aggregation on the reproductive behaviour of the peacock blenny Salaria pavo , Journal of Fish Biology, 74, 4, 754-762, 2009.
Editora
Wiley