Publicação: Behavioral response of Nile tilapia to an allopatric predator
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Taylor & Francis Ltd
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Resumo
We investigated interaction of the Nile tilapia, Oreochromis niloticus, paired with either a predator, spotted sorubim, Pseudoplatystoma corruscans, or a nonpredator, threespot leporinus, Leporinus friderici. Fish behaviors were quantified 5 min before pairing and 15 min during pairing (a heterospecific fish introduced into the Nile tilapia aquarium). Distance from the heterospecific fish, frequency, and time spent in dorsal-fin display, and frequency of agonistic interactions were registered. Agonistic interaction occurred mainly between Nile tilapia and threespot leporinus. Pairing increased frequency and time spent in dorsal-fin display, mainly when tilapia was paired with the threespot leporinus. Tilapia kept further away from spotted sorubim than from threespot leporinus. We concluded that Nile tilapia discriminates a predator from a harmless nonpredator allopatric heterospecific, suggesting a genetically-based ability. The dorsal-fin display is interpreted as both anti-predatory (displayed to the predator spotted sorubim) and intimidator behavior (displayed to the threespot leporinus).
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tilapia, Oreochromis niloticus, behavioral response, predator species, Pseudoplatystoma corruscans, non-predator species, Leporinus friderici, genome-based preference
Idioma
Inglês
Como citar
Marine and Freshwater Behaviour and Physiology. Abingdon: Taylor & Francis Ltd, v. 41, n. 4, p. 267-272, 2008.
