Heterogeneity of the Size Composition of Red King Crab in the Coastal Part of the Barents Sea
https://doi.org/10.36038/2307-3497-2018-172-149-159
Abstract
Aspects of the size composition of the Barents Sea red king crab in the coastal part of Murman and the Kanin Peninsula following the studies of the traps in 2008–2017 were analyzed. Calculations performed using the criterion of Smirnov λ and the clustering Ward’s method, show heterogeneity of the size composition of males and females in crab aggregations in different parts of the Russian territorial sea. The study resulted in 6 groups of the red king crab identified: one is found almost along the entire coast and the rest are confined to certain areas. It is shown that the composition of the spatial groups allows identifying features of the crabs’ clusters in different parts of the coastal area and the dominant size and functional group in clusters of invertebrates. The Varanger-fjord with a relatively small bottom area has 5 of 6 groups, including a group of males which occurs only in its waters. There is a separate group of females with external eggs, occupying a vast area of shallow waters along the Kanin coast of the “Voronka” of the White Sea. In 2008–2017 group formation of crabs and their division into smaller groups were observed in the Varanger-fjord. The groups in the Varanger-fjord can be defined as formed with a stable replenishment. The data obtained suggest that all groups of red king crab in the Varanger-fjord can be isolated from the Barents Sea population of this invertebrate.
About the Author
A. V. Stesko
Knipovich Polar Research Institute of Marine Fisheries and Oceanography (FSBSI «PINRO»)
Russian Federation
Russian Federation
Murmansk
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Review
For citations:
Stesko A.V. Heterogeneity of the Size Composition of Red King Crab in the Coastal Part of the Barents Sea. Trudy VNIRO. 2018;172:149-159. (In Russ.) https://doi.org/10.36038/2307-3497-2018-172-149-159
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