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Smirnova M.A.,Russian Federal Research Institute of Fisheries and Oceanography | Orlova S.Y.,Russian Federal Research Institute of Fisheries and Oceanography | Mugue N.S.,Russian Federal Research Institute of Fisheries and Oceanography | Mukhametov I.N.,Sakhalin Research Institute of Fisheries and Oceanography | And 2 more authors.
Doklady Biochemistry and Biophysics | Year: 2015

Genetic differentiation of the Pacific cod Gadus macrocephalus was studied. Samples from six regions of the Sea of Okhotsk and the Bering Sea were analyzed with two mtDNA genetic markers-gene of cytochrome 1 and the control region (D-loop). Comparative analysis showed significant genetic differentiation between the two groups of samples. The first group included samples from Tauiskaya Bay and waters of Western Kamchatka. The second group consisted of the samples collected in the waters of the Iturup Island (Sea of Okhotsk), Northern Kurile Islands, Navarin region of the Bering Sea, and Anadyr Bay. © 2015, Pleiades Publishing, Ltd.


PubMed | Sakhalin Research Institute of Fisheries and Oceanography, Russian Federal Research Institute of Fisheries and Oceanography and Magadan Research Institute of Fisheries and Oceanography
Type: | Journal: Doklady. Biochemistry and biophysics | Year: 2016

Genetic differentiation of the Pacific cod Gadus macrocephalus was studied. Samples from six regions of the Sea of Okhotsk and the Bering Sea were analyzed with two mtDNA genetic markers-gene of cytochrome 1 and the control region (D-loop). Comparative analysis showed significant genetic differentiation between the two groups of samples. The first group included samples from Tauiskaya Bay and waters of Western Kamchatka. The second group consisted of the samples collected in the waters of the Iturup Island (Sea of Okhotsk), Northern Kurile Islands, Navarin region of the Bering Sea, and Anadyr Bay.


Semenova A.V.,Moscow State University | Andreeva A.P.,Moscow State University | Stroganov A.N.,Moscow State University | Rubtsova G.A.,Russian Academy of Sciences | And 3 more authors.
Russian Journal of Genetics | Year: 2012

Variation of microsatellite loci Cpa110, Cpa113, Cpa4, and Cpa7 was for the first time examined in Pacific-type herring Clupea pallasii from the White Sea (Cl. pallasii marisalbi), the Kara Sea (Cl. pallasii suworowi), the Sea of Okhotsk, and Lake Nerpich'e, Kamchatka Bay, northwestern Pacific (Cl. pallasii pallasii). All loci exhibitedhigh genetic diversity. The estimates of expected heterozygosity varied from 41.5 to 95.6% (mean, 82%). The level of pairwise genetic differentiation F st at all microsatellite loci varied from 0.005 to 0.076 (0.019, on average) and t was statistically significant (p < 0.05) in most of the pairs of herring samples. Estimates of genetic differentiation among the herring of one subspecies were lower than between the groups belonging to different subspecies. © 2012 Pleiades Publishing, Ltd.


Semenova A.V.,Moscow State University | Stroganov A.N.,Moscow State University | Smirnov A.A.,Magadan Research Institute of Fisheries and Oceanography | Afanas'ev K.I.,Russian Academy of Sciences | Rubtsova G.A.,Russian Academy of Sciences
Russian Journal of Genetics | Year: 2014

The genetic variations among spawning groups of herrings from different spawning grounds of the northwestern part of the Sea of Okhotsk was assessed using ten microsatellite loci. All loci were polymorphic with the expected heterozygosity estimates varying at different loci in the range of 0.7-95.0% (with a mean of 68.5%). The degree of genetic differentiation displayed by the herrings from the Sea of Okhotsk was not statistically significant (θ = 0.74%). The level of pairwise genetic differentiation F ST varied in the range of 0.002-0.014, nor was it statistically significant in all comparison pairs between the herring samples. © 2014 Pleiades Publishing, Inc.


Gorbachev V.V.,Russian Academy of Sciences | Lapinskiy A.G.,Russian Academy of Sciences | Prikoki O.V.,Magadan Research Institute of Fisheries and Oceanography | Solovenchuk L.L.,Russian Academy of Sciences
Russian Journal of Genetics | Year: 2014

We used Bayesian statistics to investigate the demographic history of the walleye pollock in the sea of Okhotks based on polymorphisms of sequences of the Nd2 and Cytb mitochondrial genes. We determined the average age for the Most Recent Common Ancestor (MRCA) as 44.1 ± 2 and 52.6 ± 1.3 thousand years, respectively, for Nd2 and Cytb. These findings suggest that demographic expansion of the Okhotsk Sea pollock began 10-12 thousand years ago, which coincides with the period of global changes in the sea level during the Late Pleistocene-Early Holocene eras. © 2014 Pleiades Publishing, Inc.


Yusupov R.R.,Magadan Research Institute of Fisheries and Oceanography
Russian Journal of Marine Biology | Year: 2015

Experimental data on the embryogenesis and early post-embryonic development of the Pacific cod Gadus macrocephalus Tilesius that breed in Taui Bay are considered. Fertilized eggs at stage II have a diameter of 1.000–1.250 mm, and a mean of 1.103 ± 0.003 mm. Numerous teardrop-shaped inclusions in the plasma of the blastodisc and in blastomeres presumably prevent cod eggs from freezing at low temperatures during incubation in vivo. Embryogenesis of cod in vitro at the temperatures of 2.2 and 5.2°C lasts for 490 and 768 hours, respectively. Newly hatched cod prelarvae have a body length of 4.28–5.10 mm, a mean of 4.34 ± 0.03 mm; they switch to mixed and exogenous nutrition by 6 and 10 days, after reaching a mean length of 4.97 and 5.18 mm, respectively. © 2015, Pleiades Publishing, Ltd.

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