Size dominance affecting the social interactions and growth of juvenile Japanese flounder, Paralichthys olivaceus
Identifieur interne : 000A10 ( Istex/Checkpoint ); précédent : 000A09; suivant : 000A11Size dominance affecting the social interactions and growth of juvenile Japanese flounder, Paralichthys olivaceus
Auteurs : S. Dou [Japon] ; R. Msuda [Japon] ; M. Tanaka [Japon] ; K. Tsukamoto [Japon]Source :
- Journal of Fish Biology [ 0022-1112 ] ; 2003-12.
Abstract
Juvenile flounder Paralichthys olivaceus were size‐graded into three groups (small, large and mixing of small and large) and social interactions (feeding, aggressive attacking and activity) and growth of the fish were investigated. Growth of the subordinates (small flounder) was markedly suppressed by the presence of the dominants (large flounder). Dominants did not significantly suppress the overall food intake of the subordinates, but exhibited high aggressive attacking on the subordinates and consequently inhibited their activity. Size dominant interactions had little influence on the aggressive behaviour, feeding, activity and growth of the dominants. Results substantiated the hypothesis that the retardation in the growth of the subordinate flounder was attributed to the physiological costs of ‘stress’ by the aggression of the dominants. Individual differences in aggressive behaviour, feeding and activity were at least partly responsible for the growth depensation of the juvenile flounder. The dominants could not effectively defend the food in excess and disproportional food acquisition of the subordinates and dominants was not the primary mechanism responsible for the size hierarchy effect. In culture, size grading of the early juvenile flounder could markedly improve the growth and survival and thus possibly increase the overall biomass production of the flounder.
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DOI: 10.1111/j.1095-8649.2003.216bc.x
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Growth of the subordinates (small flounder) was markedly suppressed by the presence of the dominants (large flounder). Dominants did not significantly suppress the overall food intake of the subordinates, but exhibited high aggressive attacking on the subordinates and consequently inhibited their activity. Size dominant interactions had little influence on the aggressive behaviour, feeding, activity and growth of the dominants. Results substantiated the hypothesis that the retardation in the growth of the subordinate flounder was attributed to the physiological costs of ‘stress’ by the aggression of the dominants. Individual differences in aggressive behaviour, feeding and activity were at least partly responsible for the growth depensation of the juvenile flounder. The dominants could not effectively defend the food in excess and disproportional food acquisition of the subordinates and dominants was not the primary mechanism responsible for the size hierarchy effect. In culture, size grading of the early juvenile flounder could markedly improve the growth and survival and thus possibly increase the overall biomass production of the flounder.</div></front></TEI><affiliations><list><country><li>Japon</li></country><region><li>Région du Kansai</li></region><settlement><li>Kyoto</li></settlement><orgName><li>Université de Kyoto</li></orgName></list><tree><country name="Japon"><noRegion><name sortKey="Dou, S" sort="Dou, S" uniqKey="Dou S" first="S." last="Dou">S. Dou</name></noRegion><name sortKey="Msuda, R" sort="Msuda, R" uniqKey="Msuda R" first="R." last="Msuda">R. Msuda</name><name sortKey="Tanaka, M" sort="Tanaka, M" uniqKey="Tanaka M" first="M." last="Tanaka">M. Tanaka</name><name sortKey="Tsukamoto, K" sort="Tsukamoto, K" uniqKey="Tsukamoto K" first="K." last="Tsukamoto">K. Tsukamoto</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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