A1 Refereed original research article in a scientific journal
The influence of nutritional state on shoal choice in zebrafish, Danio rerio
Authors: Krause J, Hartmann N, Pritchard VL
Publisher: ACADEMIC PRESS LTD
Publication year: 1999
Journal: Animal Behaviour
Journal name in source: ANIMAL BEHAVIOUR
Journal acronym: ANIM BEHAV
Volume: 57
First page : 771
Last page: 775
Number of pages: 5
ISSN: 0003-3472
DOI: https://doi.org/10.1006/anbe.1998.1010
Abstract
We investigated the mechanisms and functions of shoal choice in relation to nutritional state in the zebrafish. Single fish that had been well fed or food deprived for 2 days were presented with a choice between two stimulus shoals. Food-deprived test fish showed a significant preference for well-fed stimulus fish over food-deprived ones whereas well-fed test fish did not exhibit any significant preference. Subsequent experiments showed that food-deprived test fish had a significantly higher foraging success in shoals consisting of well-fed individuals than in ones that comprised food-deprived fish. No difference in the locomotory behaviour of food-deprived and well-fed stimulus fish was found with respect to the proportion of time spent swimming (as opposed to being motionless), the proportion of time spent in the upper part of the test tank and the number of sharp turns. However, body weight, stomach width (measured directly behind the pectoral girdle) and ventro-dorsal height significantly decreased over a 48-h fooh-deprivation period. The potential use of the latter factors for the recognition; of food-deprived individuals is discussed. (C) 1999 The Association for the Study of Animal Behaviour.
We investigated the mechanisms and functions of shoal choice in relation to nutritional state in the zebrafish. Single fish that had been well fed or food deprived for 2 days were presented with a choice between two stimulus shoals. Food-deprived test fish showed a significant preference for well-fed stimulus fish over food-deprived ones whereas well-fed test fish did not exhibit any significant preference. Subsequent experiments showed that food-deprived test fish had a significantly higher foraging success in shoals consisting of well-fed individuals than in ones that comprised food-deprived fish. No difference in the locomotory behaviour of food-deprived and well-fed stimulus fish was found with respect to the proportion of time spent swimming (as opposed to being motionless), the proportion of time spent in the upper part of the test tank and the number of sharp turns. However, body weight, stomach width (measured directly behind the pectoral girdle) and ventro-dorsal height significantly decreased over a 48-h fooh-deprivation period. The potential use of the latter factors for the recognition; of food-deprived individuals is discussed. (C) 1999 The Association for the Study of Animal Behaviour.
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