Abstract
The intensity of the Pacific salmon fry migration in the Amur basin depends on the water level and floods; In the clear water of the river Anyuy rolled migration is round-the-clock, but the intensity of migration shifts to the dark time of day. In recent years, the effectiveness of reproduction is not stable, there are "failures" when the number of young people decreases dramatically, which determines the need for constant observations of the stingray for adjustments of catch forecasts. The assessment of the total number of young people sliding into the Amur River basin shows the comparability of the number of natural young and young produced by fish farms, and more research is needed to determine the role and contribution of artificial reproduction.
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