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The effect of environmental factors on byssus thread formation by some mytilids from the Sea of Japan


, : The effect of environmental factors on byssus thread formation by some mytilids from the Sea of Japan. Biologiya Morya Vladivostok ember; 30(5): 359-365

Reattachment to substrata (glass, boulders, and sand) was experimentally studied in three common mussels of upper subtidal communities of the Sea of Japan: Crenomytilus grayanus, Mytilus coruscus, and Modiolus modiolus. Over 120 h of each experiment, C. grayanus and M. modiolus produced more byssal threads than M. coruscus. A decrease in water temperature from 20 to 0[degree]C resulted in a reduction in byssus thread formation rate and even a complete passiveness of a number of experimental mussels. This was especially characteristic of M. coruscus. Newly formed byssal threads of three mussel species differed in length, thickness, and adhesive plaque size and strength. M. coruscus had the shortest, thickest, and strongest threads with a relatively large adhesive plaque. The differences are discussed in the context of morpho-physiological adaptations of mussels for colonization of various natural substrata in contrasting conditions of the upper subtidal zone.

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