Artificial enhancement of sturgeon stock in freshwater reservoirs: A case study on sterlet Acipenser ruthenus of the Kama reservoir

Mikheev, P. B.; Kazarinov, Semyon N.; Melnikova, Alla G.; Ponosov, Stanislav V.; Petrenko, Nikolai G.; Nikiforov, Andrei I.; Puzik, A. Yu.; Elchenkova, Olga N.

doi:10.1016/j.aaf.2022.04.004

Cited by 8 publications

(2 citation statements)

References 14 publications

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“…There have been several pieces of research done on freshwater fish domestication of freshwater fish for the purpose of developing aquaculture and releasing fry into their habitats to support natural populations of endangered or threatened species over the years (Van Eenennaam et al, 1996). The results of much research provided evidence of the possibility of breeding and growing sturgeon fish in farming conditions (Pavel et al, 2022). Our obtained results also demonstrated the captive breeding and domestication of sturgeon fish particularly sterlet in controlled artificial waters.…”

Section: Species Identification Of Sterlet Broodstocksupporting

confidence: 52%

Broodstock Formation and Sterlet (Acipenser ruthenus) Reproduction in the West-Kazakhstan Region

Maratova,

Isbekov,

Alpeisov

et al. 2023

OnLine Journal of Biological Sciences

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A dramatic decline of sturgeons' stocks including the sterlet (Acipenser ruthenus) in the Caspian Sea including creates the need to establish aquaculture broodstock. Broodstock management can allow conserving the gene pool of the sterlet and the creation of captive broodstock further serve as a source of sterlet fry aimed at restoring natural populations of the sterlet in the Caspian Sea. In this regard, the study aims to develop the technology of sterlet broodstock formation in the pond-based sturgeon hatchery and recirculatory aquaculture systems in the West-Kazakhstan region. Captive sterlet broodstock formation was carried out by two methodsdomestication and from the egg. Both methods were effective in sterlet broodstock management. It was the first sterlet brood stock program carried out in the sturgeon hatchery in Kazakhstan in which brood fish were taken from the natural populations of sterlet in the Kazakhstan parts of the Caspian Sea. The sterlet broodstock was genotyped using mitochondrial DNA markers. Sequencing of the control region of mitochondrial DNA in the studied individuals, for the purpose of species identification and detection of maternally inherited variability, reveals that captured broodstock from natural populations belongs to Acipenser ruthenus. As a result of artificial breeding in the hatchery 3.6 kg of fertilized eggs was obtained from 34 females and 20 males. Genetic analysis was carried out to create a genetic passport of sterlet for the Kazakhstan populations. It also revealed that at least 20 pairs of brood stock are required to avoid inbreeding and conserve the genetic diversity of the sterlet in the hatchery system. For this purpose, the structure of the recirculatory aquaculture system should provide the possibility for industrial breeding of sterlet in the region.

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Section: Species Identification Of Sterlet Broodstocksupporting

confidence: 52%

Broodstock Formation and Sterlet (Acipenser ruthenus) Reproduction in the West-Kazakhstan Region

Maratova,

Isbekov,

Alpeisov

et al. 2023

OnLine Journal of Biological Sciences

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“…The primary reasons were already established as the following: there are low numbers of mature sterlets, insufficient evidence of natural reproduction, and the habitat is being fragmented and lost. Similar trends can be observed in other habitats of the species [10][11][12][13][14]. In response to the significant decline in sterlet populations including the Hungarian section of the Danube and its tributaries, several national and international conservation initiatives have been implemented [1,12,13].…”

Section: Introductionsupporting

confidence: 53%

Genetic Characterization of Endangered Sterlet (Acipenser ruthenus, Linnaeus 1758) Gene Bank Broodstock, Natural and Cultured Populations in Hungary

Fazekas,

Kovács,

Sándor

et al. 2024

Fishes

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The sterlet (Acipenser ruthenus) is the smallest-bodied endangered species among the six native sturgeon species of the Danube River, and self-sustaining populations still inhabit the Hungarian section of the Danube River and its largest tributary, the Tisza River. Their populations are drastically decreasing; however, they still have natural reproduction in these habitats. For the genetic conservation of the species, an ex situ gene bank is maintained in Hungary. The present study aimed to analyze the genetic resources of a gene bank with a near 40-year history and to compare it with natural populations and farmed stocks. Twelve microsatellites were used for population genetics analyses and individual genotyping of 268 specimens from two natural habitats (Danube and Tisza Rivers) and three captive stocks (a gene bank broodstock and two farms). Microsatellites revealed similar patterns among wild populations and gene bank stocks and did not show genetic differentiation (FST: 0.016–0.017) among them. These results confirmed that the gene bank broodstock properly represents the genetic background of the Danube and Tisza populations and is suitable as a source of breeding materials for the restocking programs. Negative trends were detected in the farmed stocks, reflected in reduced polymorphism at a few loci. The results of the principal component analyses indicate the farm stocks’ separation from the wild and gene bank stocks. The present genetic characterization study reveals a valuable captive stock of the endangered sterlet populations and provides unique information about the genetic similarities and differences among farms and wild stocks in Hungary. Our results provide information that contributes to preserving the genetic structure and variability in sterlet populations and supports the management of gene bank broodstock—avoiding inbreeding and preserving the unique genetic background of the Carpathian basin.

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Evaluation of applying environmental enrichment to sterlets (Acipenser ruthenus L.) in early life stages

Fazekas,

Müller,

Stanivuk

et al. 2023

Applied Animal Behaviour Science

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Artificial enhancement of sturgeon stock in freshwater reservoirs: A case study on sterlet Acipenser ruthenus of the Kama reservoir

Cited by 8 publications

References 14 publications

Broodstock Formation and Sterlet (Acipenser ruthenus) Reproduction in the West-Kazakhstan Region

Broodstock Formation and Sterlet (Acipenser ruthenus) Reproduction in the West-Kazakhstan Region

Genetic Characterization of Endangered Sterlet (Acipenser ruthenus, Linnaeus 1758) Gene Bank Broodstock, Natural and Cultured Populations in Hungary

Evaluation of applying environmental enrichment to sterlets (Acipenser ruthenus L.) in early life stages

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