Preliminary experiment study on rearing chum salmon in artificial environment

Chum salmon (Oncorhynchus keta Walbaum) is typical cold water fish that reproduces in freshwater, grows in seawater, and migrates to the upriver for spawning. In order to improve the proliferation and releasing return effect and restore the resources, the fish growth experiments were conducted to rear the fish fries to parr fish in fresh water, and rear the parr to the adult fish in sea water under the artificial conditions. The results showed that the technology of rearing the hatchlings of chum salmon to the adult fish was feasible. The rearing survival rate of Chum salmon fries in the freshwater environment improved evidently to 85%, and the fries could normally grow to the parr fish for seawater rearing. Parr fish rear in the sea water for appropriate time, which can grow to the adult fish. It is an effective way to research the growth and development characteristics by controlling the growth conditions with the engineering technology method.