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Hydrobiological Journal
SJR: 0.227 SNIP: 0.575 CiteScore™: 0.24

ISSN 印刷: 0018-8166
ISSN オンライン: 1943-5991

Hydrobiological Journal

DOI: 10.1615/HydrobJ.v40.i2.120
19 pages

Trophic Interrelations in Predatory Fishes of Pacific Waters Circumambient the Northern Kuril Islands and Southeastern Kamchatka

A. M. Orlov
All-Russian Research Institute of Fisheries and Oceanography, Moscow, Russia

要約

Based on the materials collected during the field expeditions in 1992−1996, the diets of 12 predatory and 2 predatory-like fish species from the Pacific waters of the northern Kuril Islands and southeastern Kamchatka have been considered. Some aspects of their trophic relations have been analyzed. Based on comparisons of dietary overlap indexes (DOI) and taking into account annual dynamics of feeding intensity and spatial distribution of the species considered, the level of interspecific feeding competition of 17 pairs of predatory fishes having most similar rations has been estimated. The highest competition has been recorded for the following fish pairs: Sebastes borealis and Sebastolobus macrochir, and Bathyraja aleutica and B. maculata. Other species demonstrated low competition due to different levels of their ration mismatching, dynamics of feeding activity, and patterns of spatial distribution.