. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. THE BARENTS SEA 165 of the stomach differ with the seasons: in the summer and autumn they are from 8 to noon, in the spring from noon to 4 , in winter from 4 to 8 The greatest repletion of the stomach seems to be linked with definite tidal phases (half flood and half ebb). Since there is no coincidence between the time of day and the tidal phase accurate dependence of the feeding rhythm on these two factors is destroyed. The feeding of haddock. In contrast to cod, haddock feeds mainly
. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. THE BARENTS SEA 165 of the stomach differ with the seasons: in the summer and autumn they are from 8 to noon, in the spring from noon to 4 , in winter from 4 to 8 The greatest repletion of the stomach seems to be linked with definite tidal phases (half flood and half ebb). Since there is no coincidence between the time of day and the tidal phase accurate dependence of the feeding rhythm on these two factors is destroyed. The feeding of haddock. In contrast to cod, haddock feeds mainly on benthos (Fig. 67). Two hundred various forms of benthos have been found in haddock. Fig. 66. Chart of haddock migration in Barents Sea. 1 Areas of pre-spawning migrations of mature haddock; 2 Winter shoaling areas of haddock; 3 Areas of summer and autumn shoaling; 4 Migration of mature haddock; 5 Migration of immature haddock (Maslov, 1944). intestines, with a preponderance of brittle stars, bivalves, polychaetes and si- punculids. Ordinarily a large amount of the material of the sea bottom is found in the haddock's stomach. Off the Murman coast, in spring and at the beginning of summer, haddock feeds intensively on caplin, which approaches the shores for spawning, and on its spawn (Fig. 66). The importance of the separate components of the haddock's food as a percentage of the total repletion index is shown in Table 72 (according to V. Zatzepin, 1939 and A. Dekhtereva, 1931.) V. Zatzepin drew an interesting comparison for the western Murman be- tween the quantity of food consumed by haddock and the amount of benthos. This gives a definite estimate of the selective capacity of fish for its food Table 73). Haddock prefers echinoderms (brittle stars and little sea-urchins) and. 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
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