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Male urine signals social rank in the Mozambique tilapia (Oreochromis mossambicus)
Barata, E. N.; Hubbard, Peter; Almeida, O. G.; Miranda, A.; Canario, Adelino V. M.The urine of freshwater fish species investigated so far acts as a vehicle for reproductive pheromones affecting the behaviour and physiology of the opposite sex. However, the role of urinary pheromones in intra-sexual competition has received less attention. This is particularly relevant in lek-breeding species, such as the Mozambique tilapia (Oreochromis mossambicus), where males establish dominance hierarchi...
Olfactory discrimination of female reproductive status by male tilapia (Oreochr...
Miranda, A.; Almeida, O. G.; Hubbard, Peter; Barata, E. N.; Canario, Adelino V. M.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 olfactor...
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