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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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Assessment of Genetic Variability of Fish Personality Traits using Rainbow Trout Isogenic Lines ArchiMer
Millot, Sandie; Pean, Samuel; Labbe, Laurent; Kerneis, Thierry; Quillet, Edwige; Dupont-nivet, Mathilde; Begout, Marie-laure.
The study of inter-individual variability of personality in fish is a growing field of interest but the genetic basis of this complex trait is still poorly investigated due to the difficulty in controlling fish genetic origin and life history. When available, isogenic lines that allow performing independent tests on different individuals having identical genotype constitute a very relevant experimental material to disentangle the genetic and environmental components of behavioural individuality. We took advantage of heterozygous isogenic lines to investigate the personality in rainbow trout through the analysis of their reactions to different experimental situations. To this end, seven to ten rainbow trout isogenic lines were screened for their spatial...
Tipo: Text Palavras-chave: Personality; Isogenic lines; Genetic variability; Risk taking; Spatial exploration; Oncorhynchus mykiss.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00194/30496/29976.pdf
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