BIOLOGIYA MORYA, 2010, Vol. 36, No. 1, pp. 63-69 |
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Change in trace metal concentrations in tissues of the White Sea mussel Mytilus edulis over the reproductive cycle Pacific Institute of Geography, Far East Branch, Russian Academy of Sciences, Vladivostok 690041 E-mail: The changes in concentrations (µg/g) and contents (µg/specimen) of metals (Cd, Zn, and Cu) in the mussel Mytilus edulis cultivated in the White Sea were studied over its reproductice cycle (prespawning, spawning, and postspawning stages). Results, when compared with published data on the closely related species M. trossulus from the Sea of Japan, suggest that the dynamics of trace element contents in mussel tissues are related to specific geochemical conditions, as well as to the dynamics of soft tissue mass over the reproductive cycle. Contents of Cd and Cu in White Sea mussels before, during, and after spawning changed in an analogous manner to those of mollusks from the Sea of Japan. The change in Zn content at the different stages of the reproductive cycle was similar to that of mussels from the Sea of Japan but had a smaller amplitude. The concentration of Zn in White Sea mussels before spawning was the highest, but it was lower than in mussels from the Sea of Japan. After spawning, Zn concentration in White Sea mussels, in contrast to Pacific mussels, did not increase, but rather, it decreased because of the redistribution of this element from the somatic tissue into the gonad during the prespawning period. Key words: copper, zinc, cadmium, trace elements, White Sea, Sea of Japan, Mytilus edulis, reproductive cycle. |
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