Hatcheries release >4.5 billion juvenile Pacific salmon ( Oncorhynchus spp.) into the North Pacific Ocean annually, raising concerns about competition with wild salmon populations. We used retrospective scale analysis to investigate how the growth of chum salmon ( O . keta ) from western Alaska is affected by the abundance of chum salmon from Japanese hatcheries and wild pink salmon ( O . gorbuscha ) from the Russian Far East....

Interannual variations in distribution, size, indices of feeding and condition of juvenile Bristol Bay sockeye salmon Oncorhynchus nerka collected in August to September (2000–2003) during Bering–Aleutian Salmon International Surveys were examined to test possible mechanisms influencing their early marine growth and survival. Juvenile sockeye salmon were mainly distributed within the southern region of the eastern Bering Sea,...