Seasonal changes in the concentrations and total amounts (contents) of Cd, Zn, and Cu in the mussel Mytilus edulis cultivated in the White Sea were studied over the reproductive cycle (prespawning, spawning, and postspawning stages). The results, when compared with published data on the closely related species M. trossulus from the Sea of Japan, suggest that the seasonal dynamics of trace element contents in mussel tissues are related to specific geochemical conditions, as well as to the dynamics of changes in soft tissue weight over the reproductive cycle. The contents of Cd and Cu in the mussels before, during, and after spawning changed similarly in the mollusks from the White Sea and the Sea of Japan. Changes in the Zn content at different stages of the reproductive cycle of the White Sea mussels were similar to those in mussels from the Sea of Japan but had smaller amplitude. The concentration of Zn in the White Sea mussels was before spawning the highest, but still lower than in mussels from the Sea of Japan. After the spawning, the Zn concentration in the White Sea mussels, in contrast to the Pacific mussels, decreased because of the redistribution of this element during the prespawning period from the somatic tissue into the gonad.
Russian Journal of Marine Biology – Springer Journals
Published: Apr 7, 2010
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