Effects of size asymmetry on aggression and food acquisition in Arctic charr |
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| Authors: | K Lahti § N Lower †‡ |
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| Institution: | Integrative Ecology Unit, Department of Ecology and Systematics, Division of Population Biology, P.O. Box 17, FIN–00014, University of Helsinki, Finland;Department of Zoology, University of Leicester, University Road, LE1 7RH, U.K. |
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| Abstract: | The feeding rate of a group (DS) of two small, two medium and two large 1+ Arctic charr Salvelinus alpinus was higher than in a group of six fish of the same size (SS), suggesting that size distribution had an effect on feeding behaviour, with a correlation between the size of the fish and the amount of food eaten–the largest fish eating the most. Against predictions, rate of aggression was not higher in the SS groups; rather there was a modest tendency of higher aggression among individuals in the DS groups. |
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| Keywords: | size feeding aggression charr |
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