Scientific journal
Scientific Review. Biological science
ISSN 2500-3399
ПИ №ФС77-57454

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SEASONAL DYNAMICS OF DISTRIBUTION OF DEMERSAL FISH SPECIES IN THE PACIFIC WATERS OFF THE NORTHERN KURIL ISLANDS AND SOUTHEASTERN KAMCHATKA DEPENDING ON BOTTOM SALINITY

Ulchenko V.A. 1 Orlov A.M. 1
1 FSUE «Russian Federal Research Institute of Fisheries and Oceanography (VNIRO)»
The analysis of long-term data on seasonal distribution of demersal fishes depending on bottom salinity in the Pacific waters off the northern Kuril Islands and southeastern Kamchatka is conducted. Functional relationships between fish catch rates and bottom salinity were detected. Several species groups in relation to bottom salinity of habitation were determined: inhabiting waters with low salinity (rock greenling), euryhaline (Atka mackerel, Pacific cod, walleye pollock, northern rock sole, flathead sole, Pacific halibut, Kamchatka flounder, Greenland halibut, Pacific Ocean perch, shortraker rockfish, broadbanded thornyhead) and preferred high salinity (shortspined thornyhead, sablefish, popeye grenadier, giant grenadier). Conditions of habitation species on a shelf and upper parts of a continental slope were characterized by wide ranges variability of near-bottom salinity - average salinity of water from 32,89 to 34,34 %o.