alexa Unfamiliar Congener used as a Visual Attractor in Wild
ISSN: 2155-9546

Journal of Aquaculture Research & Development
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Research Article

Unfamiliar Congener used as a Visual Attractor in Wild Caught and Domesticated Sea Bass (Dicentrarchus labrax) Placed in a T-Maze

David Benhaïm1*, Marie-Laure Bégout2 and Béatrice Chatain3

1LERMA, INTECHMER/CNAM, BP 324, 50103 Cherbourg Cedex, France

2Ifremer, Laboratoire Ressources Halieutiques, Place Gaby Coll, BP 7, 17137 L’Houmeau, France

3Station Expérimentale d’Aquaculture Ifremer, Laboratoire de Recherche Piscicole de Méditerranée, Chemin de Maguelone, 34250 Palavas-Les-Flots, France

*Corresponding Author:
David Benhaïm
LERMA, INTECHMER/CNAM, BP 324
50103 Cherbourg Cedex, France
Tel: 33-(0)2-33-88-73-38
Fax : 33-(0)2-33-88-73-39
E-mail: [email protected]

Received Date: January 15, 2013; Accepted Date: January 23, 2013; Published Date: February 03, 2013

Citation: Benhaïm D, Bégout ML, Chatain B (2013) Unfamiliar Congener used as a Visual Attractor in Wild Caught and Domesticated Sea Bass (Dicentrarchus labrax) Placed in a T-Maze. J Aquac Res Development 4:169. doi:10.4172/2155-9546.1000169

Copyright: © 2013 Benhaïm D, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

The present work compared wild-caught and domesticated sea bass juveniles swimming activity, exploration and visual attraction induced by an unfamiliar congener located behind a transparent wall at the end of one arm of a T-maze. This cognitive challenge was based on the hypothesis that placed into a novel and therefore stressful environment; the fish would adopt a gregarious behaviour even though they were not familiar with the present congener. Twenty individuals of similar size from both origins were individually tested. After a 5min acclimatization period, the wall of the start-box was removed and the maze was filmed during 20 min. Different swimming variables including angular velocity (Vang), total distance travelled (Dtot), velocity mean (Vel), time spent in Immobility (Im) were analysed from videos as well as the time spent in each of 6 virtual zones including the start-box zone (Start), the zone near the congener (ZCong), the zone opposite to ZCong (OpCong) and three other zones. Vang was higher in domesticated fish and Im higher in wild fish but fish from both origins spent most of the time in ZCong showing a similar visual attraction induced by an unfamiliar congener of similar size. Nevertheless, individual variability was shown, including fish choosing to shelter in Start and fish visually attracted to the congener but located in OpCong. These results demonstrated an impact of domestication on a few swimming activity characteristics but not on gregarious behaviour. The findings are discussed with focus on ecological and aquaculture concerns and their potential interest for future cognition-based experiments on this species.

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