Decapod Crustaceans of the Barents Sea and adjacent waters: species composition and peculiarities of distribution

Abstract

Species composition and pattern of distribution of decapod crustaceans in the Barents Sea and adjacent waters have been described using the material of the PINRO-IMR trawling survey of the 2011 year. Twenty five decapod species were identified. According to their global distribution 40% of them are boreal species, and 46% -boreal-arctic species. Essential information on environmental conditions of occurrence and maps of distribution in the studied area are presented for each species. Four ecological groups of the Decapoda have been revealed by means of Canonical Correspondence Analysis: "warm water", "cold water", "deep water" and "widespread" species. Borderline of distribution of the "warm" and "cold water" decapod species is located north-eastward from respective biogeographical borderlines drawn in earlier periods, i.e. decades ago . - 2011 . . 25 . 40% , 44% --. . (CCA) 4 , : , , , .