Abstract

The recurrent groups were analyzed in order to clarify the mean pattern of the benthic species communities in the eastern Bering Sea druing the summers from 1966 to 1977 excluding 1972 and to elucidate the variations of these communities during the summers from 1966 to 1971 excluding 1969. The mutual affinities between L. aspera, T. chalcogramma, G. macrocephalus and P. quadrituberculatus were great and stable through these summers of five years. These species groups were defined as the core species group of the benthic species communities in the central region of this continental shelf. The structures of these communities are considered to be formed and to change according to the stable and the unstable relations between the species and the core species group.

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