Growth reaction norms of domesticated, wild and hybrid Atlantic salmon families in response to differing social and physical environments.

Abstract excerpt

BACKGROUND: Directional selection for growth has resulted in the 9-10th generation of domesticated Atlantic salmon Salmo salar L. outgrowing wild salmon by a ratio of approximately 3:1 when reared under standard hatchery conditions. In the wild however, growth of domesticated and wild salmon is more similar, and seems to differ at the most by a ratio of 1.25:1. Comparative studies of quantitative traits in farmed...

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