𝔖 Bobbio Scriptorium
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Behavioural variation in juvenile Arctic charr in relation to body size

✍ Scribed by D. Benhaïm; S. Skúlason; B. R. Hansen

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
193 KB
Volume
62
Category
Article
ISSN
0022-1112

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✦ Synopsis

Young Arctic charr Salvelinus alpinus, derived from one male and one female only from Lake Ölvesvatn in northern Iceland (a stock that has been popular in Icelandic aquaculture), showed large variance in body size, primarily as a consequence of variable egg size. Shortly after the onset of exogenous feeding, large fish (0·11–0·14 g) were more active and fed mainly from the water surface. Small fish (0·06–0·09 g) moved less and made fewer foraging attempts. They spent most of the time on the bottom, and foraged equally on the bottom and surface. These findings can be used to improve growth and performance of juveniles in rearing tanks.

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