Abstract
The features of the group linear growth of the bivalve Callista brevisiphonata were studied over a large part of its range in the Sea of Japan along the mainland coast of Russia. It was found that in the south of the species range in the Peter the Great Bay, the shell length in individuals of the same age can differ by almost 1.5 times, depending on the position of the population relative to the open sea. With propagation from south to north, trends to a decreasing growth rate and a narrowing of the range of age variation in shell length were recorded in C. brevisiphonata populations. It was shown that the clams need 5–18 years to reach their commercial size (a shell length of more than 70 mm). The observed differences in growth rate are considered in connection to the habitat environment of C. brevisiphonata.
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