Abstract
Two strains of Arctic charr ( Salvelinus alpinus) were reared in ambient saltwater for a 9-month period. Atlantic salmon ( Salmo salar) were reared under similar conditions for comparison of saltwater performance with that of Arctic charr in terms of aquaculture potential. There were significant differences in growth and survival between the two strains of charr. The development of a bimodal distribution in weight was evident in one strain of charr. Final mean weight of upper modal Arctic charr exceeded final mean weight of Atlantic salmon. A “critical size” for long-term saltwater survival of these two strains of Arctic charr is suggested by the weight distribution among mortalities. Genetic variation in salinity tolerance in Arctic charr is demonstrated.
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