, Volume 28, Issue 5, pp 298-307

Distribution Patterns of Strongylocentrotus Sea Urchins along the Coast of Eastern Kamchatka

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Abstract

The distribution patterns of three sea urchin species of the genus Strongylocentrotus in relation to depth, type of substrate, surf action, and to some hydrological parameters were studied along the coast of eastern Kamchatka and in adjacent waters in 1984–1996. The sea urchin Strongylocentrotus polyacanthus dominated the open coast on rocky subintertidal sites with increased surf action and standard oceanic salinity. S. droebachiensis prevailed in shoals with lower salinity, higher water temperature and lower turbulence (enclosed and semienclosed bays). S. pallidus dominated at depths corresponding to the position of the cold intermediate layer deeper than 30–50 m with normal oceanic salinity and lower temperature.