Use of ultrasonic screening in aquaculture for the directed formation sturgeon and salmon fish mature stocks

The results of research work for the period from 2018 to 2023 on the use of early non-invasive functional ultrasound screening for the purpose of targeted formation of highly productive mature-brood stocks of Siberian sturgeon of the Ob, Yenisei, Baikal, Lena populations, European sterlet of the Kama population, Siberian sterlet of the Ob, Yenisei, Irtysh populations on main full-cycle industrial fish-breeding farms of Eastern and Western Siberia using water recirculation systems are presented in the article. Biotechnological methods for the formation of highly productive mature stocks using ultrasound monitoring are described. The number of individuals with pathologies and anomalies in the development of the reproductive system, liver, gallbladder and other internal organs were estimated; treatment methods were proposed. For the first time studies on the use of ultrasound for visualizing the gonads, determining the stages of maturity, detecting diseases of the heart, liver, gallbladder in salmon fish (trout, Atlantic salmon) grown in aquaculture have been carried out. For the first time ultrasound and histological studies were carried out to study the nature of “ink spots” on the skin of Siberian sturgeon Lena population from natural habitat. It was found that in the skin of sturgeon during pathology there was a growth of epidermal cells. Melanin melanocytes increased in both epidermis and dermis. At the same time there were no elastic fibers of the epidermis after painted according to Van-Gison. All these changes may indicate melanoma

Use of ultrasonic screening in aquaculture for the directed formation sturgeon and salmon fish mature stocks

The results of research work for the period from 2018 to 2023 on the use of early non-invasive functional ultrasound screening for the purpose of targeted formation of highly productive mature-brood stocks of Siberian sturgeon of the Ob, Yenisei, Baikal, Lena populations, European sterlet of the Kama population, Siberian sterlet of the Ob, Yenisei, Irtysh populations on main full-cycle industrial fish-breeding farms of Eastern and Western Siberia using water recirculation systems are presented in the article. Biotechnological methods for the formation of highly productive mature stocks using ultrasound monitoring are described. The number of individuals with pathologies and anomalies in the development of the reproductive system, liver, gallbladder and other internal organs were estimated; treatment methods were proposed. For the first time studies on the use of ultrasound for visualizing the gonads, determining the stages of maturity, detecting diseases of the heart, liver, gallbladder in salmon fish (trout, Atlantic salmon) grown in aquaculture have been carried out. For the first time ultrasound and histological studies were carried out to study the nature of “ink spots” on the skin of Siberian sturgeon Lena population from natural habitat. It was found that in the skin of sturgeon during pathology there was a growth of epidermal cells. Melanin melanocytes increased in both epidermis and dermis. At the same time there were no elastic fibers of the epidermis after painted according to Van-Gison. All these changes may indicate melanoma

Features of Artemia aquaculture technology in Russia, prospects for its use in other temperate and tropical climates

The results of long-term monitoring of the abundance and biomass of Artemia on the example of several model lakes in the south of Western Siberia are presented. Based on this, conclusions are drawn about the dynamics of the density of Artemia crustaceans characteristic of shallow lakes of temperate climate, associated with low live birth: a high number Artemia shrimps of the first generation and a low following. It is proposed to inoculate naupliuses in lakes during the period of catastrophic decline in the number of crustaceans, which will create a new powerful generation of Artemia. The results of such experiments are shown on the example of two lakes for two years. An assumption is made about the possibility of using this technology of aquaculture of artemia in other temperate countries. Laboratory and field studies on reducing the incubation time of cysts and early release into the brine of lakes are presented. The influence of brine salinity of lakes on the results of early release of nauplius and non-hatched cysts is shown. The technology of reducing the incubation period of cysts can be used in subtropical and tropical climate