Exposure to a common environment erodes inherited between‐population trophic morphology differences in Arctic charr
Arctic charr Salvelinus alpinus juveniles reared from eggs collected from four Scottish populations showed inherited variation in their expression of trophic morphology, measured as a suite of eight characteristics of the head and mouth, before their first exogenous feeding. This demonstrated a genetic component to trophic morphology expression. During a period of 5 months following first feeding, typified by rapid growth, the differential between groups exposed to a common rearing and feeding environment was reduced significantly. It was concluded that this was the result of common environmental exposure acting on phenotypic plasticity in trophic morphology.
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Document Type: Research Article
Affiliations: Fish Biology Group, University Field Station, Institute of Biomedical and Life Sciences, University of Glasgow, Loch Lomond, Rowardennan, Glasgow G63 0AW, Scotland
Publication date: 2004-01-01