Microelement composition of pink salmon (Pink Salmon) and chum salmon (Chum Salmon) in the period of early ontogenesis

The content of Fe, Zn, Cu, Ni, Cd, Pb, and Mn in fertilized caviar, pink salmon and chum salmon larvae and larvae from three fish hatcheries in the Sakhalin region before feeding, as well as in chum salmon larvae from spawning mounds from natural spawning grounds, was studied; the microelement composition of zygotes was compared with the gametes of producers. An increase in the concentration of trace elements after fertilization of eggs was not observed for all metals. After hatching, a sharp drop in metal levels was observed due to the loss of the shell and perivithelline fluid.; In the subsequent stages of early ontogenesis, the metal content in the fish body increased. The maximum fluctuations in the concentrations of trace elements occur during the early ontogenesis of salmon, while the change in concentration is due not so much to external factors as to the transition to the next stage of development.