Repeatability of Foraging Tactics in Young Brook Trout, Salvelinus fontinalis

Auteurs-es

  • Peter A. Biro Department of Environmental Science, University of Technology, Sydney. Box 123 Broadway, NSW, 2007
  • Mark S. Ridgway Harkness Laboratory of Fisheries Research, Aquatic Research and Development Section, Ontario Ministry of Natural Resources, Third Floor North, 300 Water Street, Peterborough, Ontario K9J 8M5

DOI :

https://doi.org/10.22621/cfn.v122i1.541

Mots-clés :

Brook Trout, Salvelinus fontinalis, juveniles, behaviour, foraging, activity

Résumé

In this study, we repeatedly observed individually marked Brook Trout in a field setting to determine if the bimodal variation in foraging tactics previously observed in young salmonid populations (without distinct morphological differences) is generated by individuals specializing at different foraging tactics. We found significant but low repeatability in several foraging movement parameters. This indicated that while individuals did have tendencies to be sedentary versus highly active, there was considerable variation in foraging activity within individuals. These results suggest that relatively consistent differences among individuals may facilitate selection for specialized morphology and that there may be a heritable component to activity.

 

Erratum included.

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Numéro

Vol. 122 No. 1 (2008)

Rubrique

Articles

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