鲑鱼已经产卵或消耗完的大西洋鲑或其他鲑鱼提高直到进入咸水的时候。在卑诗省也被称为背部流下或下游河川。
A spawned out or spent Salmo salar or other salmonid up until the time it enters salt water. Also called dropback or downriver in British Columbia.
本文综述了国外近年来对大西洋鲑营养需要和饲料原料替代的研究进展，为国内开展大西洋鲑营养需要的研究和开发系列配合饲料提供参考。
Advances on the nutrient requirement of Atlantic salmon were reviewed in order to provide reference for further researches and exploitations of new formulated feeds.
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