Variability of hydrological conditions at spawning sites of East Kamchatka walleye pollock (Gadus chalcogrammus) в 2012–2022
https://doi.org/10.15853/2072-8212.2022.66.79-93
Abstract
Analysis of inter-annual variability of temperature and dynamic conditions at sites of mass spawning of East Kamchatka walleye pollock is made based on the data obtained in the course of spring ichthyoplankton surveys for the period from 2012 to 2022 and used data of remote (satellite) monitoring. Tight correlation is demonstrated between the temperatures in the water column in spring and “severity” of previous autumnwinter period in the south-western part of the Bering Sea. According to the results of remote monitoring, there is a noticeable intensification of the Kamchatka current in the last decade in the area of the research. At the same time, at the sites of mass spawning, the water transfer rate is much lower, especially in the area of Avachinsky Gulf. But even here an insignificant increase of current velocity with time can be traced.
About the Author
O. B. Tepnin
Kamchatka Branch of Russian Federal Research Institute of Fisheries and Oceanography (KamchatNIRO)
Russian Federation
Russian Federation
Head of Division
Petropavlovsk-Kamchatsky
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Review
For citations:
Tepnin O.B. Variability of hydrological conditions at spawning sites of East Kamchatka walleye pollock (Gadus chalcogrammus) в 2012–2022. The researches of the aquatic biological resources of Kamchatka and the North-West Part of the Pacific Ocean. 2022;(66):79-93. (In Russ.) https://doi.org/10.15853/2072-8212.2022.66.79-93
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