. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. GENERAL CHARACTERISTICS OF THE EASTERN SEAS 741 Table 300. Pacific and Atlantic cod, annual gain in weight, kg (P. Moiseev, 1953) Sea Age in years Fatness (Clark) 4 5 6 7 8 9 Bering Barents 1-60 0-42 2-62 0-86 3-45 5-30 1-40 204 6-80 3 06 8-65 4-53 112 0-85 differences, vary greatly in their ecology and mass development. Many mass forms found developed in one basin occupy a secondary place in the other. The cod is subject to long distance seasonal migrations in the North Atlantic, but in the Pacifi
. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. GENERAL CHARACTERISTICS OF THE EASTERN SEAS 741 Table 300. Pacific and Atlantic cod, annual gain in weight, kg (P. Moiseev, 1953) Sea Age in years Fatness (Clark) 4 5 6 7 8 9 Bering Barents 1-60 0-42 2-62 0-86 3-45 5-30 1-40 204 6-80 3 06 8-65 4-53 112 0-85 differences, vary greatly in their ecology and mass development. Many mass forms found developed in one basin occupy a secondary place in the other. The cod is subject to long distance seasonal migrations in the North Atlantic, but in the Pacific its movements are limited to local seasonal vertical trans- positions which are characteristic also of certain other fish and of commercial crabs (Fig. 364). However, the new data from the results of tagging cod at different points of the eastern coast (I. Polutov, 1952) have shown that cod may migrate from the Avachinsky Bay not only into the Kronotsky Bay, but much farther north to the Olyutor Inlet thousands of kilometres away. However, even such journeys cannot be compared with the long migrations of cod in the Atlantic. Among the distinguishing features of the seas of the northwestern Pacific as compared with those of the eastern Atlantic P. Moiseev (1953) notes the higher velocities of its currents, leading to the formation of a series of biological peculiarities in the fish. Thus the Pacific cod has the ova of a. Fig. 364. Diagram of cod migrations within the area of Karagin Island and Olyutor Inlet (Moiseev, 1953). 1 Shoaling of cod; 2 Months of shoaling; 3 Spawning Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zenkevich, L. A. (Lev Aleksandrovich), 1889-1970. New York, Interscience Publishers
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