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Data on variation in the abundance of mass fish species at early stages of ontogenesis in different areas of the Eastern Central Atlantic in warm (June–November) and cold (December–May) seasons of 1994–2012 have been analyzed. The representatives of the mass species in the region are European pilchard Sardina pilchardus , common scad Trachurus trachurus , chub mackerel...
The results of long-term studies on the spatial and vertical distribution, dynamics of abundance, size composition, and feeding habits of the Alaska skate Bathyraja parmifera in the northern Pacific Ocean are presented. The species is most abundant at depths of 200 to 700 m; in a cold season of the year, the species migrates to larger depths for overwintering, and its feeding occur at smaller depths...
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