Some morphological peculiarities of the sterlet (Acipenser ruthenus Linnaеus, 1758) in the conditions of intensive rearing in floating cage systems

Tretiak, А.; Pashko, M.; Kolos, Ye.

doi:10.15407/fsu2019.04.074

Cited by 2 publications

(12 citation statements)

References 2 publications

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“…Результати. У різні сезони року за температури води 14 overfishing caused the rapid development of commercial caviar production on sturgeon farms [1][2][3][4].…”

Section: Problem Statement and Analysis Of Last Achievements And Publ...unclassified

“…Because of this, the so-called intravital method of obtaining sturgeon eggs with the preservation of brood fish life after the collection of mature eggs in artificial conditions is of great interest for modern sturgeon farming [1,3].…”

Section: постановка проблеми та аналіз останніх досліджень і публікаційmentioning

confidence: 99%

“…In the process of creating commercial sturgeon caviar enterprises in Ukraine, primary attention was quite justifiably paid to the use of the most accessible species of the sturgeon (Acipenseridae) family in aquaculture -the sterlet (Acipenser ruthenus), whose brood stocks were created in farms in different regions of the country [3,5,6].…”

Section: постановка проблеми та аналіз останніх досліджень і публікаційmentioning

confidence: 99%

Section: постановка проблеми та аналіз останніх досліджень і публікаційmentioning

confidence: 99%

“…In addition to the sterlet, the Asian species Acipenser baerii Brandt, 1869 has been important for the sturgeon farming of many countries for a long time, mainly for the production of caviar [3,[7][8][9][10][11][12][13][14][15][16]. This species, like the sterlet, adapts well to intensive cultivation in industrial-type farms, is characterized by increased endurance and demonstrates high fecundity rates in aquaculture [3,7]. However, certain technological aspects of the use of females of this species, in particular with the shift of the traditional terms of obtaining eggs in the specific conditions of Ukrainian industrial-type farms, remain insufficiently elucidated.…”

Section: постановка проблеми та аналіз останніх досліджень і публікаційmentioning

confidence: 99%

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The results of obtaining eggs from brood sturgeon (Acipenser baerii Brandt, 1869) at first maturity grown in industrial conditions

Pashko,

Tretiak,

Pashko

et al. 2023

Ribogospod. nauka Ukr.

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Purpose. To determine and evaluate productive parameters in the process of artificially obtaining ovulated eggs in different seasons from brood Siberian sturgeon Acipenser baerii Brandt, 1869 at first maturity grown in conditions of floating cage systems with a natural water temperature of the forest-steppe of Ukraine. Methodology. The material for the study were 65 individuals of age-8+ to 10+ sturgeon females with a body weight of 6.02‒8.64 kg firstly used in breeding works, which were grown using intensive technology in floating cages installed in a water body with a natural temperature regime of the forest-steppe zone. Experiments on obtaining mature eggs were conducted in non-traditional breeding periods — in winter (February) and at the end of spring (the last decade of May). In the winter, a recirculation aquaculture system was used with the use of special methods of preparing brood fish in the process of obtaining mature eggs. Collection of ovulated eggs was carried out with the preservation of life of brood fish after hormonal stimulation of gonad maturation using a carp pituitary preparation. Determination of productive parameters and study of physicochemical factors of the environment were carried out according to generally accepted methods. Findings. In different seasons of the year at a water temperature of 14–21°C, high efficiency of gonad maturation was registered in both groups of brood fish. The average weight of mature eggs obtained in separate groups of sturgeon females was 1.02–1.15 kg with an average gonadosomatic index of 13.92–15.42%. 94–97% of fish responded to pituitary stimulation in different groups of brood fish. The duration of brood fish maturation after the second (decisive) injection with a total dose of a gonadotropic substance of 3.5–4.0 mg/kg of fish weight varied within 14–25 hours. The survival rate of brood fish after egg collection was close to 94%. Originality. The results of obtaining mature eggs from Siberian sturgeon (Acipenser baerii) females at first maturity using the industrial fish farming technology, which is not common for aquaculture in Ukraine, were determined and analyzed. Practical value. The study results are of interest for the development of modern sturgeon aquaculture technologies in the conditions of industrial-type farms, primarily for the organization of caviar production. Keywords: brood sturgeon (Acipenser baerii), industrial fish farming, oocyte ovulation, productive parameters, caviar production.

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Section: Problem Statement and Analysis Of Last Achievements And Publ...unclassified

Section: постановка проблеми та аналіз останніх досліджень і публікаційmentioning

confidence: 99%

Section: постановка проблеми та аналіз останніх досліджень і публікаційmentioning

confidence: 99%

Section: постановка проблеми та аналіз останніх досліджень і публікаційmentioning

confidence: 99%

Section: постановка проблеми та аналіз останніх досліджень і публікаційmentioning

confidence: 99%

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The results of obtaining eggs from brood sturgeon (Acipenser baerii Brandt, 1869) at first maturity grown in industrial conditions

Pashko,

Tretiak,

Pashko

et al. 2023

Ribogospod. nauka Ukr.

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Characteristics of the ecological danger of illegal poaching fish catches in the lower reaches of the Irtysh river

Volosnikov

2023

E3S Web of Conf.

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Poaching of aquatic biological resources is one of the most common environmental crimes, causing direct and indirect harm to the entire amount of fish stocks. It is necessary to have a clear understanding of the composition and quality of poacher’s catches in order to properly manage fish stocks. This paper examines the poaching catches of the lower reaches of the Irtysh River, based on the data of forensic ichthyologic examinations over the past 9 years. The study showed that the basis of poaching catches is Siberian sturgeon, sterlet, ide, carpbream, nelma, burbot, less in demand, gibel carp, crucian carp, common roach, zander, perch, pike. Poachers harvest Siberian sturgeon, burbot, sterlet, gibel carp, nelma and pike of all sizes, not giving preference only to large or small ones. From 2013 to 2019, sturgeons dominated the catches, but since 2020, the share of cyprinids has increased significantly. An analysis of the fatness of fish in poacher catches shows that poachers try to seize healthy and well-fed representatives of all fish species, except for the Siberian sturgeon, which is harvested regardless of condition.

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Some morphological peculiarities of the sterlet (Acipenser ruthenus Linnaеus, 1758) in the conditions of intensive rearing in floating cage systems

Cited by 2 publications

References 2 publications

The results of obtaining eggs from brood sturgeon (Acipenser baerii Brandt, 1869) at first maturity grown in industrial conditions

The results of obtaining eggs from brood sturgeon (Acipenser baerii Brandt, 1869) at first maturity grown in industrial conditions

Characteristics of the ecological danger of illegal poaching fish catches in the lower reaches of the Irtysh river

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