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La Réponse aux Couleurs chez Dicentrarchus labrax (Moronidae) , Placé en Situation de «Self‐feeding», et de Choix Multiple: Response to Colours in Dicentrarchus labrax (Moronidae) , in a Self‐Feeding and Multiple Choice Condition
Author(s) -
Kentouri M.,
Anthouard M.,
Divanach P.
Publication year - 1993
Publication title -
marine ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.668
H-Index - 58
eISSN - 1439-0485
pISSN - 0173-9565
DOI - 10.1111/j.1439-0485.1993.tb00483.x
Subject(s) - dicentrarchus , sea bass , captivity , predation , biology , population , fish <actinopterygii> , predator , zoology , ecology , fishery , demography , sociology
. A population of sea‐bass, housed under semi‐natural and self‐feeding conditions, was presented with six different coloured levers. Their choices tended to favour more colour‐contrasted levers and were greatly affected by environmental conditions such as stress factors, circadian period, season, and thermal fluctuations. A correlation was observed between increases in instrumental acitivity, indicating an increase in energetic requirements, and a widening of choices in the exploitation of the coloured levers. Consequences of these behaviours were considered in relation to predator pressure that the fish imposes on potential prey populations in the natural environment, and in relation to the initiation of feeding activity when the fish are maintained in captivity and under self‐feeding conditions.