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Publicação
Aggressive behaviour and energy metabolism in a cichlid fish, Oreochromis mossambicus
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Orientador(es)
Resumo(s)
We have investigated the effect of mirror-elicited agonistic behaviour on oxygen consumption in the Mozambique tilapia, Oreochromis
mossambicus (Cichlidae). Males exposed to their mirror image showed higher frequencies of both lateral display and tail-beating and escalated
aggression more frequently than males exposed to a transparent glass that was used as a control for the presence of a novel object in the tank. This
aggressive response was correlated with an increase in oxygen consumption. Overt aggression was highly correlated with display behaviour and
with locomotor activity. Bivariate analyses showed high correlation (explaining about 64% of variation) between overt aggression, locomotor
activity and metabolic rates. Weakly positive bivariate correlations between displays and metabolic rates turned spurious after partialling out
aggression. The data suggest that energetic costs only emerge late during the conflict, when animals escalate their aggressive behaviour.
Descrição
Palavras-chave
Mirror-elicited aggression Agonistic display Metabolic rate Tilapia Oreochromis mossambicus
Contexto Educativo
Citação
Physiology & Behavior, 89 (2), 164-170