Reproductive conditions of walleye pollock Theragra chalcogramma (Gadidae) off the northeastern coast of Sakhalin Island, Sea of Okhotsk


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Abstract

The spatial distribution of eggs and larvae of the walleye pollock Theragra chalcogramma is considered in respect to dynamics of oceanologic processes, nutrients, chlorophyll а and zooplankton off the northeastern coast of Sakhalin Island in spring 2012. It is shown that the effect of severe temperature regime in the near-bottom horizons in the western Sea of Okhotsk during the spawning period of walleye pollock becomes milder due to specific features of water dynamics. The egg distribution is determined by mesoscale eddies in the region. The species survival depends on the effect of such environmental factors as freshwater discharge from the Amur River, eddy structure in waters of the Sea of Okhotsk, and dynamics of phytoplankton and zooplankton development.

About the authors

Kim Sen Tok

Sakhalin Research Institute of Fishery and Oceanography

Author for correspondence.
Email: n.kim@sakhniro.ru
Russian Federation, Yuzhno-Sakhalinsk, 693023

I. N. Mukhametov

Sakhalin Research Institute of Fishery and Oceanography

Email: n.kim@sakhniro.ru
Russian Federation, Yuzhno-Sakhalinsk, 693023

D. S. Zavarzin

Sakhalin Research Institute of Fishery and Oceanography

Email: n.kim@sakhniro.ru
Russian Federation, Yuzhno-Sakhalinsk, 693023

V. N. Chastikov

Sakhalin Research Institute of Fishery and Oceanography

Email: n.kim@sakhniro.ru
Russian Federation, Yuzhno-Sakhalinsk, 693023

E. M. Latkovskaya

Sakhalin Research Institute of Fishery and Oceanography

Email: n.kim@sakhniro.ru
Russian Federation, Yuzhno-Sakhalinsk, 693023

Zh. R. Tskhai

Sakhalin Research Institute of Fishery and Oceanography

Email: n.kim@sakhniro.ru
Russian Federation, Yuzhno-Sakhalinsk, 693023

E. S. Korneev

Sakhalin Research Institute of Fishery and Oceanography

Email: n.kim@sakhniro.ru
Russian Federation, Yuzhno-Sakhalinsk, 693023

T. G. Koreneva

Sakhalin Research Institute of Fishery and Oceanography

Email: n.kim@sakhniro.ru
Russian Federation, Yuzhno-Sakhalinsk, 693023

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