Data on the population size-age structure of the bivalve mollusk Nuttallia obscurata inhabiting Klyuchi Lake of the Dzhigitovka River water catchment area are adduced. It was shown that the Nuttallia forms populations with a density up to 1280 ind./m2 and a biomass up to 13.9 kg/m2 on sand and silt-sand bottoms in the near mouth part of the lake. The maximum length of the mollusk shell was 65 mm at an age of 10 years in the studied aggregation. Finds of Nuttallia and subfossil shells of other thermotropic bivalves (Musculista senhuosia, Solen krusensterni and Ruditapes philippinarum) in Klyuchi Lake evidenced that representatives of the Mid Holocene warm-loving malacofauna penetrated up to 45°N along the continental coast of the Sea of Japan.
Russian Journal of Marine Biology – Springer Journals
Published: Jul 13, 2005
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