Abstract
Juvenile coho salmon (Oncorhynchus kisutch), reared in a brackish water impoundment for 90 days, migrated to sea in June as O-age smolts and returned as 2-year-old adults. Males grew faster than females in the impoundment and smolted earlier, but females grew faster than males in the ocean. The 2-year-old cohos that returned from O-age smolts averaged 4.6 and 8.S pounds respectively, for the males and females, with a sex ratio of 3:1. EFFECT OF RAPID SMOLT GROWTH ON COHO MAT|JRATION Abstract: Juvenile coho salmon (Oncorhynchus kisutch), reared in a brackish water impoundment for 90 days, migrated to sea in June as O-age smolts and returned as 2-year-old adults. Males grew faster than females in the impoundment and smolted earlier, but females grew faster than males in the ocean. The 2-year-old cohos that returned from O-age smolts averaged 4.6 and 8.S pounds respectively, for the males and females, with a sex ratio of 3:1.
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