Trace Elements in Masu Salmon Oncorhynchus Masou from the Bakhura River, Southeastern Sakhalin Island, the Sea of Okhotsk

Abstract

AbstractConcentrations of several trace elements (Cu, Pb, Cd, Ni, and Zn) were measured in masu salmon (Oncorhynchus masou), the smallest in size and warmest-water species of Pacific salmon. The analyzed masu specimens came to spawn in the Bakhura River, the southeastern coast of Sakhalin Island, and were collected at the local fish hatchery. It has been found that the level of the trace elements, of which two (Pb and Cd) are toxic, in masu salmon meets the sanitary standards of the Russian Federation for seafood. A comparison of the microelement compositions of masu and pink salmon, which also came to spawn in the southeast of Sakhalin Island (Firsovka River), has shown that masu accumulates mainly Zn, Cu, and Ni during growth and feeding, while pink accumulates Pb and Cd.KeywordsPacific salmonMasu salmon (Oncorhynchus masou)Heavy metalsSea of OkhotskSoutheastern coast of Sakhalin Island