Assessment of stock state for walleye pollock in the Okhotsk Sea in the spring 2013

Results of the trawl and ichthyoplankton surveys conducted in the northern Okhotsk Sea in the spring of 2013 are presented. In comparison with 2012, the abundance of walleye pollock decreased in 1.8 times and its biomass - in 1.4 times. Number of the 1+ pollock is assessed in 1.6·109 ind., so the 20...

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Bibliographic Details
Main Authors: Evgeny E. Ovsyannikov, Sergey S. Ponomarev
Format: Article in Journal/Newspaper
Language:Russian
Published: Transactions of the Pacific Research Institute of Fisheries and Oceanography 2014
Subjects:
охотское море
минтай
численность
биомасса
нерестовый запас
пополнение
размерно-возрастной состав
Aquaculture. Fisheries. Angling
SH1-691
Okhotsk
okhotsk sea
Online Access:https://doi.org/10.26428/1606-9919-2014-177-114-124
https://doaj.org/article/69c682a7ac7f4bb1babe4cc539de6d5c
Description
Summary:Results of the trawl and ichthyoplankton surveys conducted in the northern Okhotsk Sea in the spring of 2013 are presented. In comparison with 2012, the abundance of walleye pollock decreased in 1.8 times and its biomass - in 1.4 times. Number of the 1+ pollock is assessed in 1.6·109 ind., so the 2012 year-class is weak. The size structure is distinguished by 3 modes formed by strong year-classes: 17-23 cm (2+), 30-36 cm (5+), and 37-53 cm (mature fish). Spawning stock of pollock in the northern Okhotsk Sea is assessed as 6.649 million t that is considered as a medium value.

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