The Effect of Controlled Light on the Maturation of Adult Blueback Salmon

Abstract

unusable, a program of trapping, spawning, and rearing all salmon at lower river locations might be feasible. An operation like this would involve diverting the adult salmon near the beginning of their migration run into holding ponds and retaining the fish until they matured. For long-run species such as spring chinook salmon (On.corhynchus tshawytscha) and blueback salmon (O. nerka), this holding period would extend for several months. Mortalities of' adult salmon are often severe during a long holding period. Even under the most favorable conditions some