Monitoring of adaptive potential by functional loads and feeding regime of sturgeon juveniles

Lagutkina, Lina Yurievna; Bakhareva, Anna Aleksandrovna; Akhmedzhanova, Aliya; Fedorovykh, Yulia Viktorovna; Kuzmina, Evgenia

doi:10.1051/e3sconf/202017502004

Cited by 4 publications

(2 citation statements)

References 13 publications

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“…The dynamics of the growth rate was assessed based on the analysis of changes in linear and weight indicators and their dependencies among themselves (absolute and average daily growth, average daily growth rate, Fulton fatness coefficient, mass accumulation coefficient). Measurements and calculations were carried out in accordance with the recommendations adopted in fish farming [11,12].…”

Section: Materials and Methods Of Researchmentioning

confidence: 99%

Feed additive for fishdiet with antioxidant and immunostimulating effect

et al. 2022

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The increase in the production of aquaculture products confirms the relevance of the development of feed production in order to provide the industry with high-quality compound feeds and feed additives that meet modern requirements and biological needs of cultivated fish. Therefore, the development of aquaculture requires special attention to the feeding process and the use of full-fledged and environmentally safe feeds for all types of aquacultures. Antioxidants of natural origin are increasingly used in feed production. In the course of the work, the positive properties of antioxidant complexes containing the bioflavonoid dihydroquercetin in combination with vitamin E were studied when enriching the diet of a tilapia hybrid (Oreochromis mossambicus × Oreochromis niloticus). As a result of the research, it was found that the inclusion of dihydroquercetin in the composition of production feeds significantly improved productivity indicators and the main criteria for the formation of muscle mass in fish. The use of bioflavonoid dihydroquercetin allowed to increase productivity by 30.0%. The positive effect of the feed additive on morphological and biochemical parameters of blood was noted, which indicates an increase in natural resistance. The study of feed quality indicators confirmed the inhibition of oxidation processes in feed with the addition of dihydroquercetin. During the period of storage of feed in the experimental batch of feed, the level of peroxide number decreased by 3 times, and the acid number decreased by 28.4%. Taking into account the positive properties of bioflavonoid, it is recommended to further study the effectiveness of this biologically active additive in order to introduce it more widely into the practice of feed production.

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Section: Materials and Methods Of Researchmentioning

confidence: 99%

Feed additive for fishdiet with antioxidant and immunostimulating effect

et al. 2022

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“…The Caspian Sea is one of the unique internal reservoirs of the planet with an amazing variety of species composition of ichthyofauna and other representatives of the animal world. A special place in the biocenosis of this reservoir is occupied by sturgeon species of the oldest relict ichthyofauna [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Morphofunctional assessment of domesticated and aquacultured beluga females

et al. 2021

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In the early 80-ies of the last century, there was a sharp decline in the population of the Caspian beluga in Russia. Its fishing was prohibited, except for catching for reproduction and scientific purposes. In the practice of sturgeon breeding, the method of repeated use of sturgeon females and males by obtaining sexual products in vivo, as well as growing breeders in artificial conditions, has become widely put into practice. Against the background of an acute shortage of wild breeders of this sturgeon species, in recent years, the main way to form sturgeon broodstock in the conditions of the Lower Volga region is domestication. However, in recent years, the catches of wild beluga females in the fishing areas of the Lower Volga are estimated as single specimens. The article studies the fish-breeding, biological and physiological parameters of domesticated and aquaculture-bred beluga females. The reproductive function of domesticated and artificially raised beluga females is evaluated. Some proposals for the intensification and priority areas of artificial reproduction in order to replenish natural populations are presented.

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Evaluation of morphological indicators of the first mature sturgeon females from eggs in artificial conditions

Akhmedzhanova

Ponomarev

Fedorovykh

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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Sturgeon species of fish are a unique branch of the relict fish fauna. Species biodiversity, features of biology, a wide range, nutritional value, all taken together, made it possible to distinguish this group of fish in an independent direction-sturgeon breeding. In the last century, Russia accounted for up to 90% of the world’s stocks of these fish species. According to the number and species composition of sturgeon, the Caspian basin occupied a dominant position. Nevertheless, over the past 15-20 years, there has been a landslide undermining of the unique stocks of sturgeon fish in this reservoir. The main reason for the reduction of sturgeon stocks is the excess of the removal of populations over their replenishment. Against this unfavorable background, it became necessary to form broodstock in order to compensate for the decreasing number of wild breeders. To solve this problem, two main directions have been formed in sturgeon breeding – the domestication of wild fish and the cultivation of mature breeders in artificial conditions on the principle of “from eggs to eggs”. In the article, fish-biological and physiological indices of the first mature females of beluga grown in the natural background annual dynamics of water-medium temperature by the principle “from eggs to eggs”.

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Monitoring of adaptive potential by functional loads and feeding regime of sturgeon juveniles

Cited by 4 publications

References 13 publications

Feed additive for fishdiet with antioxidant and immunostimulating effect

Feed additive for fishdiet with antioxidant and immunostimulating effect

Morphofunctional assessment of domesticated and aquacultured beluga females

Evaluation of morphological indicators of the first mature sturgeon females from eggs in artificial conditions

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