Determination of the terminal molt of the snow and tanner crabs in the field
https://doi.org/10.36038/2307-3497-2018-172-6-26
Abstract
Data on correlation between the claw height (CH) and carapace width (CW) of the males of the crabs Chionoecetes from the Okhotsk and the Bering seas are evaluated. The coefficient of morphometric maturity (K%) is suggested for division of morphometrically mature and immature males. K% is calculated as percent relation of the CH to CW. The boundary value which allows divide mature and immature males with the probability more than 95% is equal to 16 for C. bairdi and C. angulatus. For the majority populations of the snow crab C. opilio (West Kamchatka, the Northern part of the Okhotsk Sea, East Sakhalin, Navarin area of the Bering Sea) it is equal to 21, while for 2 populations (the Central part of the Okhotsk Sea; Koryaksky area of the Bering Sea) it is equal to 19. It is proposed that immature males of the snow crab become physiologically mature when K% exceeds 14, and they become morphometrically mature while it exceeds 20. Correlations between morphometrically maturity, hemolymph biochemistry and muscle development are discussed. The general pattern of the snow and tanner crabs males growth with account of alternatives in the age of both physiological and morphometric maturities and terminal molt is proposed.
About the Authors
S. I. Moiseev
Russian Federal Research Institute of Fisheries and Oceanography (FSBSI «VNIRO»)
Russian Federation
Russian Federation
Moscow
A. I. Buyanovsky
Russian Federal Research Institute of Fisheries and Oceanography (FSBSI «VNIRO»)
Russian Federation
Russian Federation
Moscow
S. A. Moiseeva
Institute of Cell Biophysics (FSBSI «ICB RAS»)
Russian Federation
Russian Federation
Pushchino, Moscow reg.
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For citations:
Moiseev S.I., Buyanovsky A.I., Moiseeva S.A. Determination of the terminal molt of the snow and tanner crabs in the field. Trudy VNIRO. 2018;172:6-26. (In Russ.) https://doi.org/10.36038/2307-3497-2018-172-6-26
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