Early life behavioural differences in wild caught and domesticated sea bass (Dicentrarchus labrax)

Type Article
Date 2012-10
Language English
Author(s) Benhaim David1, Pean Samuel2, Lucas Gael1, Blanc Nancy1, Chatain Beatrice3, Begout Marie-LaureORCID2
Affiliation(s) 1 : CNAM, INTECHMER, LERMA, F-50103 Cherbourg, France.
2 : IFREMER, Lab Ressources Halieutiques, F-17137 Lhoumeau, France.
3 : IFREMER, Lab Rech Piscicole Mediterranee, Stn Expt Aquaculture, F-34250 Palavas Les Flots, France.
Source Applied Animal Behaviour Science (0168-1591) (Elsevier Science Bv), 2012-10 , Vol. 141 , N. 1-2 , P. 79-90
DOI 10.1016/j.applanim.2012.07.002
WOS© Times Cited 33
Keyword(s) Domestication, Swimming activity, Restocking, Selection, Coping styles
Abstract Behavioural studies comparing hatchery and wild-caught fish are useful to improve selection for aquaculture and restocking programmes. We examined swimming behaviour characteristics in wild captured and domesticated sea bass juveniles before and after eliciting a startle response at 8 different ages and always on naive individuals. We specifically investigated whether domestication impacts juvenile sea bass behaviour and whether the first months of captivity induce behavioural modifications in wild juveniles. An apparatus was designed to mimic a predator attack by presenting a sudden visual and mechanical stimuli simultaneously in 8 arenas where single individuals were placed and video recorded. The reactivity response was evaluated and different swimming variables including angular velocity, total distance travelled, mean velocity, immobility and distance from stimulus point were analysed from videos taken 5 min before stimulus actuation, 5 and 15 min after. Otolith readings showed that wild and domesticated juveniles were of similar age (similar to 55 days at the start of the experiment and similar to 125 at the end of experiment). There were consistent behavioural differences (e.g. higher angular velocity and distance from stimulus point in wild fish) demonstrating that domestication reduces flight response behaviour. There were also similarities between both fish origins (similar response to stimulus actuation: decrease of total distance travelled and mean velocity, increase of angular velocity and immobility). A decrease over time in reactivity and variability in swimming responses among fish of both origins showed that captivity only does not fully explain wild fish behaviour changes and ontogenic modifications are likely interplaying. (C) 2012 Elsevier B.V. All rights reserved.
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