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Allozyme Variation of Nonspecific Esterases in Russian Sturgeon Acipenser güldenstädti Brandt
Russian Journal of Genetics, 2002Electrophoresis in 7% polyacrylamide gel was used to analyze nonspecific esterases from different organs and tissues of Russian sturgeon. The basic enzymatic activity was observed the four zymogram zones. In sixteen cases the patterns of isozyme distribution in these zones allowed to consider them as allele systems (14 polymorphic and 2 monomorphic ...
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In vitro steroidogenesis by gonads of the Russian sturgeon, Acipenser gueldenstaedti Brandt
Fish Physiology and Biochemistry, 1997Ovaries and testes from the Russian sturgeon at different stages of sexual maturity were incubated with ;sup3;H-androstenedione or 3H-pregnenolone. The major metabolites of androstenedione in both sexes were testosterone and 5α- and 5s-androstanediols, but no evidence was found for the gonadal production of 11-oxygenated androgens.
O. Bukovskaya, J.G.D. Lambert, D.E. Kime
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Sexual development in Russian sturgeon (Acipenser gueldenstaedtii) grown in aquaculture
2008The Russian sturgeon (Acipenser gueldenstaedtii) has been introduced into aquaculture in recent years, following the decline of natural populations and the resultant increases in the price of caviar. In nature, males and females of this species mature sexually after 8 to 13 and 10 to 16 years, respectively. Fertilized Russian sturgeon eggs were bred up
Hurvitz, Avshalom +4 more
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A Comment on the Siberian, Acipenser baerii, and Russian, Acipenser gueldenstaedtii, Sturgeons
Environmental Biology of Fishes, 2004Contrary to the opinion of Kynard et al. (2002), the Siberian sturgeon, Acipenser baerii, does not belong to the Ponto-Caspian species. It inhabits Siberian rivers and Lake Baikal. Acipenser baerii is a typical potamodromous species and the comparison of the behavior of its embryos and larvae with those of the anadromous Russian sturgeon, Acipenser ...
Vadim J. Birstein, Georgii Ruban
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Otolith microstructure of the Russian sturgeon, Acipenser gueldenstadti
Journal of the Marine Biological Association of the United Kingdom, 2002Otolith microstructure of the Russian sturgeon, Acipenser gueldenstadti was examined in adult samples collected in the Caspian Sea. The microstructure of the otolith was the same among specimens. The anterior side of the sagitta grew in two directions elongating both the long and short arms, and the long arm sections exhibited 14–21 distinct ...
Takaomi Arai, Nobuyuki Miyazaki
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Ontogenez, 2011
Dispermic androgenesis was used to produce, for the first time, an androgenetic progeny of the Siberian sturgeon (Acipenser baerii) and the androgenetic nuclear cytoplasmic hybrids (Siberian sturgeon, A. baerii x Russian sturgeon, A. gueldenstaedtii) using cryopreserved sperm.
A S, Grunina +6 more
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Dispermic androgenesis was used to produce, for the first time, an androgenetic progeny of the Siberian sturgeon (Acipenser baerii) and the androgenetic nuclear cytoplasmic hybrids (Siberian sturgeon, A. baerii x Russian sturgeon, A. gueldenstaedtii) using cryopreserved sperm.
A S, Grunina +6 more
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Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries)
The Volga-Caspian basin is the most important fishery reservoir, in which about 90% of the world’s sturgeon stock was concentrated. The highest catches of sturgeon in the Caspian Sea were recorded at the beginning of the XX century. Unfavorable climatic conditions, a decrease in freshwater runoff and a drop in sea level in the mid-30s and 40s worsened ...
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The Volga-Caspian basin is the most important fishery reservoir, in which about 90% of the world’s sturgeon stock was concentrated. The highest catches of sturgeon in the Caspian Sea were recorded at the beginning of the XX century. Unfavorable climatic conditions, a decrease in freshwater runoff and a drop in sea level in the mid-30s and 40s worsened ...
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[Steroid hormones in the regulation of migration in fishes (study of the Russian sturgeon)].
Rossiiskii fiziologicheskii zhurnal imeni I.M. Sechenova, 2004Serum steroids profiles were determined at different stages of the migratory cycle of Russian sturgeon. In the sea period, before gonads maturation cortisol and sex steroids levels were comparatively low. Elevation of cortisol and testosterone concentrations occurred at the stage of preparation to migration.
I A, Barannikova +3 more
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Control of Synchronization of Puberty in the Russian Sturgeon
2012Berta Levavi-Sivan +4 more
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