Agonistic and reproductive behaviors in males of red hybrid tilapia, Oreochromis niloticus (Linnaeus, 1758) x O. mossambicus (Peters, 1852) (Osteichthyes: Cichlidae)

Agonistic and reproductive behaviors in males of red hybrid tilapia, Oreochromis niloticus (Linnaeus, 1758) x O. mossambicus (Peters, 1852) (Osteichthyes: Cichlidae)

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The red hybrid tilapia, Oreochromis niloticus (Linnaeus, 1758) x O.mossambicus (Peters, 1852) is a fertile hybrid used in the semi-intensive crystal beaded candle holder level of fish culture in the Northeast of Brazil.It is a territorial cichlid and is highly aggressive towards conspecifics during the breeding season.

The purpose of this study was to investigate and describe the aggressive behaviour displayed by the males of this hybrid in non-reproductive and reproductive contexts.Behavioural observations revealed that aggression displayed by the reproductive males of red hybrid tilapia included threatening, undulation, parallel, lateral and frontal attacks, chasing, escape and submission.Possession of a territory influenced male aggressiveness, which was more intense in their own territory than that observed in a neutral situation.

The males built nests, irrespective of female presence.All the behavioural patterns were in accordance with those airpods in jacksonville previously described for one parental species, the Nile tilapia, O.niloticus.