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Relationship between the Position Preference and Nutritional State of Individuals in Schools of Juvenile Roach (Rutilus rutilus)

Jens Krause, Dirk Bumann and Dietmar Todt
Behavioral Ecology and Sociobiology
Vol. 30, No. 3/4 (1992), pp. 177-180
Published by: Springer
Stable URL: http://www.jstor.org/stable/4600673
Page Count: 4
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Relationship between the Position Preference and Nutritional State of Individuals in Schools of Juvenile Roach (Rutilus rutilus)
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Abstract

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.

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