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Tambovskii V.S.,Sakhalin Ecological Company | Tikhonchuk E.A.,Russian Academy of Sciences | Shevchenko G.V.,Sakhalin Research Institute of Fishery and Oceanography
Russian Meteorology and Hydrology | Year: 2010

The ice drift data obtained with the Furuno radar using a special methodology simultaneously at seven fixed points around the Molikpaq oil-drilling platform on the northeastern shelf of Sakhalin Island in the period from May 14 to 28, 2003 are analyzed. It is shown that at different distances from the shore significant variations are observed both in the alongshore and, especially, transverse components of the tidal seaice drift, which are responsible for the ice cover deformation, whose indices are of a substantial magnitude. The divergence has the maximum positive values (the ice opening is observed) at comparatively low drift velocities of southern bearings soon after the tidal flow direction changed. The ice cover compression was accordingly observed under opposite conditions. The dependence of deformation indices on the tidal cycle phase is well agreed with the results earlier obtained at the coastal Odoptu radar station (RS), where the measurements were carried out using a similar methodology under alike physico-geographic conditions. A steady character of the results obtained allows forecasting the tide-induced ice cover extension and compression, which is of a practical value for providing the ship operations in the region of the Molikpaq platform in the ice season. © 2010 Allerton Press, Inc. Source


Galanina E.V.,Sakhalin Research Institute of Fishery and Oceanography | Lomakina A.V.,Russian Academy of Sciences
Biology Bulletin | Year: 2012

Ichthyological studies of spawners of salmonids in the south of Sakhalin Island were studied. Cases of furunculosis disease were revealed. The agent of the disease Aeromonas salmonicida was isolated. Its morphological, physiological-biochemical, and antagonistic properties were studied, and the virulence of the isolated strains was determined. For supporting the species status of the studied strains of A. salmonicida, a molecular-genetic analysis was performed. © 2012 Pleiades Publishing, Ltd. Source


Zhivoglyadov A.A.,Sakhalin Research Institute of Fishery and Oceanography
Journal of Ichthyology | Year: 2014

Based on materials collected in 2004-2008 at 44 water courses of Sakhalin, eight main communities of fish habitation within channel zones with a definite combination of hydromorphological parameters were distinguished. The structure of communities is described, and specific indices of their abundance are provided. Comparative analysis of changes taking place in communities at seasonal changes and technogenic impacts demonstrated that seasonal rearrangements have a more pronounced pattern than changes initiated by technogenic intervention. © 2014 Pleiades Publishing, Ltd. Source


Tok K.S.,Sakhalin Research Institute of Fishery and Oceanography
Journal of Ichthyology | Year: 2014

According to bottom trawl surveys of 1988–2012, spatial distribution, structure, and dynamics of biomass of demersal ichthyocenosis in the northeastern waters of Sakhalin are analyzed. It is shown that the shelf zone is of decisive importance for formation of fish aggregations in this region. Main fish aggregations in the region are confined to the zone of widened shelf near northeastern lagoons of the island at 52°–53° N. Demersal ichthyocenoses are represented mainly by mass species of Gadidae, Pleuronectidae, and Cottidae. Main trends of long-term dynamics of fish biomass of eastern Sakhalin waters are similar to those in waters of northeastern (Kamchatka) and southeastern (south Kurils) parts of the Sea of Okhotsk. Long-term data indicate a tendency for an increase in the total biomass of fish in the periods of sea warming that are favorable for appearance of strong-year classes in mass species. © 2014, Pleiades Publishing, Ltd. Source


Mukhametova O.N.,Sakhalin Research Institute of Fishery and Oceanography
Journal of Ichthyology | Year: 2010

Ichthyoplankton surveys are made in lagoon water bodies of the south-eastern part of Sakhalin (the Vavai-Chibisan system of lakes, Lake Tunaicha, Lake Izmenchivoe) from April until November 2002-2007. Comparative characteristics of ichthyoplankton complexes in the ice-free period is given. In the investigated lagoon lakes, differences in the species composition of the ichthyoplankton by the number and time of appearance of the maxima of abundance of eggs and larvae are noted, and also related to morphological structure and hydrological conditions of water bodies. In lagoon lake Izmenchivoe with a salinity not less than 26‰, the eggs and larvae of marine fishes only takes place while, in Vavai-Chibisan lakes, that of freshwater fishes only takes place. In brackish lake Tunaicha, the lowest number of fish species reproduce. In the Vavai-Chibisan system and in Lake Izmenchivoe, one maximum of abundance of ichthyoplankton in June is recorded and, in Lake Tunaicha, two maxima (the highest in June and less expressed in August) are recorded. Irrespective of the species composition, the ichthyoplankton complexes of lagoon lakes have general traits determined by hydrological conditions of water bodies and by their general origin and geographic situation: prevalence of eggs and larvae of low boreal fish species, the maximum species diversity in the late spring-early summer, and decrease of abundance in cooler years. © 2010 Pleiades Publishing, Ltd. Source

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