Influence of growth on the biological and commercial productivity of Caspian great sturgeon Huso huso

• Published in: Aquaculture 2021-02, Vol.533, p.736139, Article 736139
• Main Authors: Bakhshalizadeh, Shima, Zykov, Leonid Alexandrovich, Nasibulina, Botagoz Murasovna, Kurochkina, Tatyana Fedorovna, Fazio, Francesco
• Format: Article
• Language: English
• Subjects: Aquaculture; Biological productivity; Caspian great sturgeon; Growth; Natural mortality; Population biomass; Sexual maturation
• ISSN: 0044-8486; 1873-5622
• DOI: 10.1016/j.aquaculture.2020.736139

Fisheries management has expanded from a traditional focus to a more holistic model based on a model describing the change in the number of generations of fish under the influence of age-dependent natural mortality and harvesting. We calculated the abundance, biomass, production, natural, total loss and catches from the conditional population of great sturgeon resulting from the replenishment of 1.0 million instances of fingerlings with different rates of linear and weight growth in the period 1931–1975. It was found that the size of fingerlings has the greatest influence on the abundance and biomass of conditional great sturgeon populations formed from juveniles. We found an increase in the length of annuals of 19.3%, with the biomass of the conditional population, its production and catch size increasing by 2.9 times. Thus, cultivation of sturgeon in sturgeon hatcheries (SH) and the release of large sized great sturgeon juveniles into the sea will significantly increase the efficiency of work of the artificial reproduction of stocks. •The growth rate of sturgeon juvenile in the first year of life had effect on the number and biomass.•Size of fingerlings influences the biomass of sturgeon populations formed from juveniles.•The length of fingerlings is fundamental for our understanding of the life history of sturgeon.