The active biomonitoring method was used to examine the changes in heavy-metal (Fe, Zn, Cu, Cd, Mn, Pb, and Ni) contents in the organs (muscle, gonads, mantle, gills, digestive gland, and kidney) of the mussels Crenomytilus grayanus and Modiolus modiolus. The dynamics of trace element concentrations in mussel organs during the experiment were compared with their subcellular distribution. The defense strategy of M. modiolus consisted of the threshold accumulation of toxic metals in all organs followed by their excretion, whereas the strategy of C. grayanus involved short-term isolation from adverse environmental influence. Under chronic pollution, in C. grayanus the main loads occurred in the digestive gland and kidney. Under acute changes in environmental conditions, the processes of regulation (detoxification/excretion) of Fe, Mn, and Pb in this species were impaired substantially.
Russian Journal of Marine Biology – Springer Journals
Published: May 22, 2012
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