Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/3867
Título: Olfactory discrimination of female reproductive status by male tilapia (Oreochromis mossambicus)
Autor: Miranda, A.
Almeida, O. G.
Hubbard, Peter
Barata, E. N.
Canario, Adelino V. M.
Palavras-chave: Behaviour
Reproduction
Chemical communication
Fish
Pheromone
Courtship
Cichlid
Data: 1-Jun-2005
Editora: The Company of Biologists
Citação: Miranda, A.; Almeida, O. G.; Hubbard, P. C.; Barata, E. N.; Canario, A. V. M.Olfactory discrimination of female reproductive status by male tilapia (Oreochromis mossambicus), Journal of Experimental Biology, 208, 11, 2037-2043, 2005.
Resumo: The current study investigated whether discrimination of sexual status of female tilapia by males is mediated by olfaction. Size-matched groups of female tilapia were assigned as pre- or post-ovulatory according to the time since their last ovulation (15–19·days pre-ovulatory, N=7; 1–3·days post-ovulatory, N=8). Female-conditioned water and body fluids (urine, bile, faeces and plasma) were assessed for olfactory potency in males by recording the electro-olfactogram (EOG). Water extracts, urine and faeces from pre-ovulatory females all evoked significantly larger amplitude EOGs in male fish (N=6), with correspondingly lower thresholds of detection, than those from post-ovulatory females. Plasma and bile evoked very large amplitude EOGs in males but with no differences between the two groups of females. Anosmic males (N=6) did not behave differently towards pre- or post-ovulatory females, while sham-operated males (N=6) showed a marked increase in urination rate towards pre-ovulatory females. We conclude that the ability of male tilapia to discriminate between females of differing reproductive status is mediated by odorants released into the water, probably via the urine and faeces, by pre-ovulatory females.
Peer review: yes
URI: http://hdl.handle.net/10400.1/3867
DOI: http://dx.doi.org/10.1242/jeb.01584
ISSN: 0022-0949
Versão do Editor: http://jeb.biologists.org/content/208/11/2037.full.pdf+html
Aparece nas colecções:CCM2-Artigos (em revistas ou actas indexadas)

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