Relationship between the position preference and nutritional state of individuals in schools of juvenile roach (Rutilus rutilus) |
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Authors: | Jens Krause Dirk Bumann Dietmar Todt |
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Affiliation: | (1) Institut für Verhaltensbiologie, Freie Universität Berlin, Haderslebenerstrasse 9, W-1000 Berlin 41, Federal Republic of Germany;(2) Present address: Department of Zoology, University of Cambridge, Downing Street, CB2 3EJ Cambridge, UK |
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Abstract: | Summary Position preferences of well-fed and food-deprived juvenile roach were investigated in schools of 2 and 4 fish in the laboratory. Food-deprived fish appeared significantly more often in the front position than their well-fed conspecifics. For fish at the same hunger level, individuals at the front of the school had the highest feeding rate. These results represent the first evidence for a relationship between the nutritional state of individual fish and their positions in a school and suggest a functional advantage of the preference.Offprint requests to: J. Krause at the present address |
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