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Effects of dispersant treated oil upon exploratory behaviour in juvenile European sea bass (Dicentrarchus labrax) ArchiMer
Aimon, Cassandre; Lebigre, Christophe; Le Bayon, Nicolas; Le Floch, Stephane; Claireaux, Guy.
Accidental spills are pervasive pollution in aquatic ecosystems. Resorting to chemical dispersant is one of the most implemented strategies in response to oil spills, but it results in an increase in the bio-availability of oil compounds known to disturb fish neurosensory capacities and hence fish habitat use. While it has become well established that acute oil exposure can cause a range of physiological defects, sub-lethal consequences on animal behaviour have only received recent attention. Here we investigated the effect of an exposure to a 62 h- dispersant treated oil on the exploration tendency (exploratory activity, and avoidance of unfamiliar open areas) of juvenile European sea bass. Three different concentrations of chemically dispersed oil were...
Tipo: Text Palavras-chave: Behaviour; Oil spill; Teleost fish; Exploration; Open field test; European sea bass.
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00658/77020/78290.pdf
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Food deprivation reduces social interest in the European sea bass Dicentrarchus labrax ArchiMer
Aimon, Cassandre; Le Bayon, Nicolas; Le Floch, Stephane; Claireaux, Guy.
Periods of food deprivation up to several months are common features for fishes and in such conditions, fitness will be determined by their capacity to maximize food encounter while minimizing predation risk. In this context, the propensity to take risk and the willingness to associate with conspecifics are particularly important as they contribute to alleviating the trade-off between predation avoidance and foraging efficiency. This study examined to what extent food deprivation modulates fish risk-taking and social behaviours, as well as the relationship between them. To address these issues juvenile European sea bass were either fed daily with a maintenance ration or food-deprived during 3 weeks. Risk-taking and sociability were assessed through...
Tipo: Text Palavras-chave: Behaviour; Teleost fish; Exploratory activity; Sociability; Risk taking; Behavioural interaction.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00474/58552/62391.pdf
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