Abstract
In 1973, adult sockeye salmon, Oncorhynchus nerka, were transported from Nakvassin Creek, Baranof Island, southeastern Alaska, to a nearby research station and hatchery at Little Port Walter. Progeny from these fish were used for the study. The fry were initially cultured in freshwater, then transferred to an estuarine net pen as fingerlings (6.7 g) on 31 October 1974 for overwinter culture in seawater. Survival of the fingerlings from transfer until 21 April 1975 was 97%. Two groups of smolts were released from the net pen in 1975: an early group on 22 April and a late group on 7 June. The age, sex ratios, and size of returning adults from the two releases were similar. The proportion of the returning adults from each group, however, was significantly different ( P < 0.001): 9.2% of the later release group returned versus 4.0% of the earlier release group. Most of the transplanted fish returned to Little Port Walter; however, some adults strayed between Little Port Walter and Nakvassin Creek.
Published Version
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