EVENT
ECONOMICS AND BUSINESS
The article discusses the problems of globalization of the world economy using the example of industrial fishing. The conceptual essence of this process is revealed. The analysis of the historical development of the problems of globalization is given. The positive and negative sides of globalization and its impact on fisheries management, primarily on industrial fishing, are analyzed. Globalization and geo-ecological problems of Russia are discussed. The problems of scientific support for neutralizing the negative effects of globalization are formulated.
An overview of the current state and tasks of digitalization of production processes in the fisheries of the Russian Federation, monitoring of fisheries, ensuring reliable communication, collecting information to improve the quality of management decisions, increase the effectiveness of solving socio-economic problems, simplify access to public services for fishermen, and increase business transparency is presented. The ways of solving national sovereignty in the field of digitalization are shown, security.
FISHERIES EDUCATION
The article examines the experience of implementing VNIRO youth policy within the framework of the VNIRO Navigator program, segmented into 5 tracks, taking into account age and interests. The project “Holidays in Rybnoye!”, aimed at teenagers aged 14-16, gave the children the opportunity to participate in real scientific work, introduced them to all sides of this area of work, which can attract them to receive specialized education and further work in the fisheries complex. The innovation of the project consists in intensive training by the method of “immersion in science” and close communication with highly qualified researchers and gaining professional experience, starting from an early age. The project, in whole or in part, can be recommended for implementation in VNIRO branches and other scientific organizations.
ECOLOGY
The paper presents data on the prediction of morphometric measurements for herring of the Sea of Okhotsk using machine learning algorithms (neural networks). It has been shown that at least 12 features correlate with each other with a high and very high degree of correlation (r>0.7–0.9). The possibility of using neural networks to predict missing morphometric (and other types of) data for any biological objects, regardless of their geographical habitat, is demonstrated. As an example, the values of 6 morphometric features were given, such as: the length of the entire fish (ab), the weight of the fish, the distance between P and V (vz), the lengths of the lower and upper blades C, the anteanal distance. The predicted values, as shown, deviated from the reference values for a number of measurements from 0.2% to 3%, which is less than the natural variance in the sample, reaching up to 14% in some respects. Everything presented allows us to propose neural networks as a modern scientific method, for example, to eliminate the lack of statistical data or to «close the needs» for obtaining new morphometric measurements.
CONGRATULATE
BIORESOURCES AND FISHERIES
The article presents the results of the analysis of the commercial state of the cod production facility: the dynamics of changes in the volume of ODE and catch, user ratio for established and distributed types of production quotas in the West Kamchatka zone from 2019 to 2023.
INTERNAL RESERVOIRS
The conceptual and historical aspects of ecology, taxonomy, genetics, demography and the peculiarities of selectivity dynamics of the Yenisei sturgeon are considered. On the basis of mathematical modeling, the life expectancy of the Siberian sturgeon has been revised and traveling waves of promizyatiya selectivity, a gene wave, the dynamics of alleles of the Siberian sturgeon, the ambiguity of the Weight–Age relationship leading to the collapse of the fold have been found
The article presents an analysis of the boundaries of the Volga pre-estuarine forbidden space in retrospect and in the present period. The dynamics of the area of the Volga pre-estuary forbidden space is shown, which over the last century has decreased by more than 10 times. Most of the water area of the Volga pre-estuary forbidden space is currently located on land. Reason: drop in the level of the Caspian Sea and a decrease in the volume of Volga runoff. Using the example of a separate northwestern section of the delta and delta front of the river The Volga River clearly shows how the coastline of the Caspian Sea and, accordingly, the protective zone of the Volga pre-estuary forbidden space have changed. Taking into account the current water and fishery situation, the dynamics of the fall in the level of the Caspian Sea, proposals were made to update the northern boundary of the space, draw the coastline along the mark of 28.7 m BS and expand the protected areas.
AQUACULTURE
In this work, 10 biochemical parameters of blood serum of rainbow trout grown in a system of closed-loop water supply installations (SLV) at various planting densities were studied: control (10.8 kg/m3), SLV No. 1 (14.4 kg/m3) and SLV No. 2 (18 kg/m3) in a chronic experiment lasting 60 days. It was revealed that with an increase in the planting density of fish to 18 kg/m3 over a period of 30 days, toxic nitrogen compounds in the form of nitrites accumulated in the cold-water system of the ultrasonic system, the concentration of which was 0.19 mg/l. Further, with the continuation of a long-term experiment, it was shown that on the 60th day in the water of UZV No. 1 and No. 2 outside the MPC there were indicators of nitrites and nitrates in concentrations of 0.1 and 0.16 mg/l, respectively, while not leading to a fatal outcome of the growing objects. It was shown that with an increase in the concentrations of nitrites and nitrates in the water in ultrasound No. 2, the biochemical parameters of fish blood exceeded the norm: the level of aspartate aminotransferase increased by 58%, creatinine – by 7.32%, alkaline phosphatase – by 64.1% and lactate dehydrogenase – by 37.8%, signaling a violation of the physiological status of the liver and kidneys. Based on the results of the work, it was determined that the study of 10 biochemical parameters of the blood of rainbow trout is an indicative system for determining the health status of fish during their cultivation under chronic stress due to increased planting density in the ultrasound.
The Australian redclaw crayfish Cherax quadricarinatus (von Martens, 1868) is one of the promising subjects of global aquaculture. In the article on the basis of studies of life cycle, growth, critical values of temperature, salinity tolerance, feeding preferences of Australian redclaw crayfish the current state and prospects of cultivation of this species in Russia are considered. The weaknesses and strengths of current technology are identified. The most promising for the cultivation of the Australian redclaw crayfish are the southern regions of Russia, where it is possible to grow the species in summer in pond aquaculture for more than three to four months at temperatures above 20 °C. To achieve higher cultivation efficiency, it is recommended to use technologies that combine commercial pond rearing with the production and rearing of juveniles in a closed recirculation system.
In the context of the transition to a circular economy and the solution of the problem of obtaining large volumes of biological products, the use of closed water supply system for aquaculture objects becomes promising. The efficiency of obtaining large volumes of products is determined both by a well-chosen aquaculture object and by its growing conditions. Whereas water is a universal solvent and the habitat of hydrobionts, regular monitoring of the physical and chemical indicators of the water, capable to show comprehensively and promptly occurring changes, is necessary. For these purposes, the work is studied an innovative indicator – total antioxidant activity and shows the features of the distribution of antioxidant properties of water in a small closed water supply system. It was revealed that small circulation systems with Clarias gariepinus (planting density up to 83 kg/m3) are characterized by changes in the total antioxidant activity from 3.4944 to 14.783 mgRu/dm3.
MARICULTURE
The paper presents the results of optimization of the technology for obtaining viable juveniles of the Far Eastern sea cucumber using an industrial method in the conditions of marine pools. The total number of settled juveniles was 8,4 million specimens, viable juveniles – 1,5 million specimens. When the juveniles reached an average weight of 0,5 g, they were landed in the water area of the Troicy Bay (Posieta Bay, Sea of Japan) for pasture growing to commercial sizes.
FISHING EQUIPMENT AND FLEET
Nhe article discusses the possibility of obtaining various design parameters of fishing gears in the form of cylinders, cones and other space figures. On the basis of data from drawings, the analysis of the construction of net fishing gears was made, a number of their construction features suggested, a list of design values for research and graphs presented. This was illustrated by the calculation of mesh bar size, density, opening of mesh, radius and tensile strength of bundles of mesh cones of the 29.2/33M bottom trawl for cephalopod fishing and fine-mesh part of 70/370M mid-water trawl. Based on the data from the cut drawings, diagrams were constructed and the functional changes of the parameters along the length of the area under consideration were obtained.
TECHNOLOGY
An analysis of published information in the field of cryopreservation of acipenseriformes sperm was carried out. The presented review briefly traces the historical experience in the development of cryopreservation methods and examines in detail the current state of research over the past two decades. Technological approaches are systematized, the most promising development trends and existing problems are identified.
Among the elements of a healthy diet that improve the performance of the human body, probiotics or probiotic foods are isolated, which contribute to correcting the composition of the internal indigenous microflora of the intestinal microbiota. In accordance with this, the article presents research on the design of models of the composition of a probiotic food fish product using the high-level Python programming language, as well as the development of technology for obtaining this type of product. The Python programming language using popular libraries such as SciPy and PuLP allows you to implement a linear programming method that solves similar problems related to the design of formulations of multicomponent food systems. As a result, 8 formulations of probiotic edible fish product of the group of semi-canned fish, in particular pates based on biotransformed bacterial starter cultures (L. acidophilus and S. thermophilus) fish fillets (pollock (Theragra chalcogramma), cod (Gadus macrocephalus), small-eyed macrurus (Albatrossia pectoralis), Gilbert’s half-shelled Goby (Hemilepidotus gilberti)) with the subsequent development of a technological scheme for obtaining this type of product. The designed formulations and the developed technology contribute to the production of a fish product with the presence of live forms of probiotics in the amount of 106-109 CFU/g.
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