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Critical involvement of dietary docosahexaenoic acid in the ontogeny of schooling behaviour in the yellowtail
Author(s) -
Masuda R.,
Takeuchi T.,
Tsukamoto K.,
Ishizaki Y.,
Kanematsu M.,
Imaizum K.
Publication year - 1998
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1998.tb00996.x
Subject(s) - seriola quinqueradiata , biology , docosahexaenoic acid , ontogeny , eicosapentaenoic acid , oleic acid , carangidae , food science , larva , fish larvae , fatty acid , zoology , fishery , polyunsaturated fatty acid , fish <actinopterygii> , biochemistry , endocrinology , ecology
To investigate involvement of the central nervous system in the ontogeny of behaviour, diets of differing quality were used to rear yellowtail Seriola quinqueradiata larvae and juveniles. Artemia nauplii enriched with oleic acid (OA), eicosapentaenoic acid (EPA), or two different concentration levels of docosahexaenoic acid (DHA) were fed to yellowtail larvae (L T 7 mm; 13 days old) for 12 days, and their behavioural development was analysed together with growth, survival, activity and fatty acid composition. Yellowtail fed with DHA–enriched Artemia showed mutual attraction behaviour at 11 mm L T , while those fed with OA– or EPA–enriched Artemia did not show this behaviour at the same size. While fish in the OA group showed poor growth, survival and activity index, fish in the EPA group were similar to the two DHA groups. In addition, most fish tested, including the OA group, showed clear optokinetic responses. Fatty acid composition of the diet was reflected in that of the fish body. Therefore, dietary DHA in the larval stage is considered to be essential for the development of schooling behaviour in the yellowtail.