Specific features of maturation of Russian sturgeon (Acipenser gueldenstaedtii Brandt, 1883) females in the environment of Temryuk and Grivenskoe sturgeon hatcheries
The main source of recruitment to the population stocks of sturgeon fish species are broodstocks developed at sturgeon hatcheries in the early 2000s. This paper presents the materials concerning spawning intervals for repeat maturity of the females from the broodstocks in the environment of a sturgeon hatchery. This study was carried out at Temryuk and Grivenskoe sturgeon hatcheries in the Azov Sea and Kuban River Region from 2009 to 2020. The Russian sturgeon females upon their first and repeat maturity, aged 9–18, have been the subject of this study. Following this investigation, it has been found out that, in controlled environment of a sturgeon hatchery, the first maturity of A. gueldenstaedtii females occurs at the age of 11–13 (of 10 in isolated cases). Repeat maturity (the second and subsequent ones) has been observed two years after the previous spawning; a 3–4-year spawning interval is recorded in 25.0 % of the Russian sturgeon females. It has been established that in the case of repeat maturity, females show increased fecundity, oocyte size, yield of 1-day larvae per 1 individual, and viability of the offsprings, as compared to reproductive capacity of the females upon their first spawning. Results of the investigation of production characteristics of the breeders are of great scientific and practical interest.
| Main Authors: | , , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Russian |
| Published: |
2021
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| Subjects: | Acipenser gueldenstaedtii, Sturgeon culture, Population stocks, Russian sturgeon, Spawning grounds, Spawning seasons, Broodstocks, Yield, Breeders, Производители, Ремонтно-маточные стада, Созревание, ASFA_2015::H::Hatcheries, ASFA_2015::R::Recruitment, ASFA_2015::A::Artificial rearing, |
| Online Access: | http://hdl.handle.net/1834/41748 |
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