Seasonal changes in zooplankton composition in the Barents Sea, with special attention to Calanus spp. (Copepoda)

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Abstract
The Barents Sea is an important area with respect to fisheries resources (i.e. capelin and cod). In May, June and August 1981 zooplankton biomass was measured along a transect at 30°E, from the ice border southwards. A maximum was recorded in Atlantic water by the end of June (>100 g wet weight m−2 In August the biomass values were relatively low south of the Polar front and increased northwards into Arctic water (−50 g m−2 The species composition was influenced by the distribution of cold Arctic water and warmer Atlantic water. The zooplankton was dominated by the copepods Calanus finmarchicus and C. glacialis; the former is regarded as an Atlantic species and C. glacialis as an Arctic species.

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