scholarly journals Long-term Trends of Distribution and Reginal Composition of Hatchery-released Juvenile Pink and Chum Salmon in the Sea of Okhotsk during the Fall of 2011–2017

2019 ◽  
pp. 46-48
Author(s):  
Alexander Bugaev ◽  
Alexandra Chistyakova ◽  
Shigehiko Urawa
Keyword(s):  
Sea Of Okhotsk ◽  
Chum Salmon ◽  
The Sea Of Okhotsk ◽  
Long Term Trends

Long-term trends in distribution and regional composition of the catches of hatchery pink and chum salmon during autumn migrations in the basin of the Sea of Okhotsk

2021 ◽  
Vol 57 (57) ◽  
pp. 67-98
Author(s):  
A. V. Bugaev ◽  
A. I. Chistyakova ◽  
S. Urava
Keyword(s):  
Sea Of Okhotsk ◽  
Chum Salmon ◽  
Pink Salmon ◽  
The Sea Of Okhotsk ◽  
North East ◽  
The North ◽  
Intraspecific Structure ◽  
Juvenile Chum Salmon ◽  
Long Term Trends

Long-term trends in distribution and regional composition of the catches of hatchery pink and chum salmon during autumn post-catadromous migrations in the basin of the Sea of Okhotsk in 2011–2017 were evaluated based on the otolith marking data. Qualitative and intraspecific structure of the hatchery fish aggregations was analyzed in connection to the interannual variety in forming abundant and not abundant generations of pink salmon. The analyze is carried out allowed to find out that the aggregation density of Russian and Japan hatchery juvenile chum salmon in the eastern part of the Sea of Okhotsk is higher in the even years of observation. Along that the distribution of the active migrants of the Sakhalin-Kurile and Hokkaido stock complexes in the north-east direction withing the Okhotsk Sea basin is better expressed. We think, that the main reason is low abundance of pink salmon generations (odd years of spawning) on West Kamchatka during autumn migration in the even years.In general the results obtained indicate that the cyclic migration of juvenile pink and chum salmon in the basin of the Sea of Okhotsk during post-catadromous migrations is of a systemic and mass character. Hatchery and wild fish have been engaged. The scheme of the juvenile distribution is similar in even and odd years.

LEVEL VARIABILITY OF THE SEA OF OKHOTSK COASTAL AREAS AT THE BEGINING OF THE 21ST CENTURY AND ITS REPRESENTATIONIN THE GLOBAL REANALYSIS DATABASES

2020 ◽  
Vol 42 (4) ◽  
pp. 411-424
Author(s):  
Aleksandr KHOLOPTSEV ◽  
Sergey PODPORIN
Keyword(s):  
Sea Level ◽  
Sea Of Okhotsk ◽  
Tide Gauge ◽  
Coastal Areas ◽  
Global Ocean ◽  
Satellite Monitoring ◽  
Climate Data ◽  
Sea Levels ◽  
The Sea Of Okhotsk

The paper aims to investigate basic features of modern long-term variations of the Okhotsk Sea level in its coastal areas and establish feasibility of certain retrospective analysis databases usage for determination of mean rates of the above processes. The reanalysis databases considered include Global Ocean Physics Reanalysis GLORYS12v.1 by the Copernicus Marine Environment Monitoring Service and ICDC-reanalysis supported by the Integrated Climate Data Center, which provide coverage of the sea in question. The raised problem is of significant interest for physiographers, oceanographers and involved in coastal shipping and marine safety in the Sea of Okhotsk. Long-term sea level variations are most accurately monitored by tide gauge stations, which, however, are scarce along the coast of the sea in question. Less accurate and not uniformly available through easier to use and collect data is the satellite monitoring by radar altimeters. Global retrospective analyses based on mathematical modelling are considered to be an effective instrument to assess sea levels at any given time at any point.

scholarly journals Excitation of seiches in ice at port water area of the sea of Okhotsk

2019 ◽  
Vol 486 (4) ◽  
pp. 475-479
Author(s):  
G. I. Dolgikh ◽  
D. P. Kovalev ◽  
P. D. Kovalev
Keyword(s):  
Numerical Simulation ◽  
Spectral Analysis ◽  
Dynamic System ◽  
Sea Of Okhotsk ◽  
Water Area ◽  
External Forcing ◽  
Sea Waves ◽  
Wave Processes ◽  
The Sea Of Okhotsk

Long term observations of sea waves with one second discreteness in the port harbor of Sea of Okhotsk (Sakhalin island) at a depth of about two meters under the ice were carried out using autonomous wave recorders in 2009-2017. Spectral analysis of the data showed the presence of several significant peaks on the periods from 2 to 15 seconds in the spectra for the moments of strong swell at sea. These peaks are caused by wave processes that are generated due to the nonlinear transformation of the swell coming in ice. The numerical simulation of the reaction of the dynamic system - the water area described by the Duffing equation, depending on the parameters included in the equation and determined from experimental observations, is carried out. It is shown, including using the Poincare mapping that the amplitude of external forcing has the greatest influence on the transition of the system to chaos.

scholarly journals Trace element composition of the Southwestern Sakhalin Chum Salmon

2021 ◽  
Vol 937 (2) ◽  
pp. 022074
Author(s):  
A Litvinenko ◽  
N Khristoforova ◽  
V Tsygankov ◽  
M Kovalchuk
Keyword(s):  
Sea Of Japan ◽  
Sea Of Okhotsk ◽  
Chum Salmon ◽  
Trace Element Composition ◽  
Oncorhynchus Keta ◽  
The Sea Of Japan ◽  
The Sea Of Okhotsk ◽  
Lead And Cadmium ◽  
The Difference ◽  
The Impact

Abstract The study is devoted to the microelement composition of organs and tissues of chum salmon (Oncorhynchus keta), which came for spawning in September 2018 in the r. Lovetskaya on the southwestern coast of Sakhalin. Samples of organs and tissues of fish, prepared in Sakhalin, were frozen and delivered to Vladivostok for chemical analysis. Trace elements were determined from acid mineralizates by atomic absorption on a Shimadzu AA 6800. It was found that the content of microelements indicating anthropogenic impact on the environment (Zn, Cu and Ni) in the Sea of Japan chum was significantly higher than the content of those in the Okhotsk Sea fish. So, for example, the amount of zinc in the muscles of the Sea of Japan chum salmon was 2.5 times higher than in those of the Sea of Okhotsk fish. In the liver, the effect was even greater - the difference between the content of this element in the Sea of Japan and the Sea of Okhotsk reached 19 times. At the same time, in the organs and tissues of the Okhotsk chum salmon, which crossed the impact geochemical zone in the Kuril-Kamchatka region at least twice during its life cycle, the content of lead and cadmium, witnesses of underwater and surface volcanism in the Kuril straits, prevailed. The content of lead in the muscles of chum salmon from r. Raidovaya was 4 times more than in the muscles of chum salmon from the river. Lovetskaya; in the liver, the difference was 5 times.

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