Parental stress-coping styles affect the behaviour of rainbow trout Oncorhynchus mykiss at early developmental stages

Erik Höglund, H.-M. Gjoen, T.G. Pottinger, O. Overli

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This work examined behavioural responses in yolk-sac rainbow trout Oncorhynchus mykiss larvae originating from strains selected for high (HR) or low (LR) plasma cortisol response to a standardized stressor. The results showed that yolk-sac larvae originating from the HR strain were more sensitive to environmental stressors, in that they showed a shorter reaction time to low oxygen levels. Previous studies on adult and juvenile individuals from these strains demonstrated a number of correlated physiological and behavioural differences. In yolk-sac larvae, growth and development depended mainly on internal factors, which suggest that at least some aspects of stress-coping styles are inherent to the individual, before factors such as social experience or variable access to food resources could modify behavioural strategy.
Original languageEnglish
JournalJournal of Fish Biology
Volume73
Issue number7
Pages (from-to)1764-1769
ISSN0022-1112
DOIs
Publication statusPublished - 2008

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