In the central open part of the Sea of Okhotsk there is an international moratorium on fishing. The basis of moratorium is legal acts of Russian Federation and international treaties. Russia has special rights to the fish resources of the Sea of Okhotsk, including the central part. At the same time, in this enclave there has been a fishery for Greenland Halibut by Japanese fishing vessels for 36 years. This fishing has a small scale. Nevertheless, the Government of Japan annually receives confirmation from Russia to continue this fishing. The Sea of Okhotsk in the international legal aspect has a number of features, and the situation changes periodically. The article discusses the various conditions associated with this fishery.

The anatomical and morphological features of the main species of the whitefish family have been studied. The color of the back of the omul varies from brown to green, the sides are silvery. Peled has a dark gray color with a metallic sheen, while the back of the fish is almost black. Monitoring for infectious diseases of fish showed only isolated cases of deviations. When conducting chemical and toxicological studies of fish, compliance with the requirements of sanitary standards in terms of safety indicators in all reservoirs of the region was noted.

The effect of the mixed fungicide Pictor, SC (Dimoxystrobin, 200 g/L + Boscalid, 200 g/L) an its active ingredients on cladocerans, specifically Daphnia magna Straus, has been investigated. The impact of this fungicide on the biological characteristics of the zooplanktonic organisms has been examined both for isolated (active ingredients) and combined (preparative forms) exposure. It has been found out that the increase of the fungicide concentration in solutions resulted in the decrease in the reproductive rate, abundance, and biomass of the Daphnia population. Based on the experimental data, no observed effect and the lowest observed effect concentrations have been identified for the active ingredients of the fungicide and for its preparative form. It has been established that the preparative form has no additive effect on the survival rate and biological processes of the development, growth, and reproduction of the zooplankton organisms. The active ingredients, present in the fungicide in its preparative form and most toxic for the susceptible links of a trophic chain in a water body, could be recommended as indicators during the examination of the water bodies of fisheries importance for the content of mixed fungicides of new chemical classes. Determination of the content of such active ingredients can be used for unbiased assessment of the environmental threat posed by the mixed pesticides to aquatic ecosystems.

The paper contains materials on the optimization of the educational process in teaching the course «Technology of fish and fish products» in a view of the digital transformation of agriculture

The necessity of updating the fishing fleet is substantiated. The excess of the nominal capacity for catching vessels under construction over the volume of the total allowable catch (TAC) of bottom fish species was established. It is shown that the processing capacity of coastal plants far exceeds the supplied volumes of fish raw materials. Proposals are given to determine the market price for fish products in Russia and increase its consumption by the population.

Nowadays, after a long period of depression, Japanese sardine (Sardinops sagax) is on the rise. At a high stock level, this species expands its range, migrating to high-productivity Northwest Pacific Ocean areas, where it becomes available to Russian fishery. The article analyzes the long-term catches, as well as provides fishery catches data for 2021. The article also describes distribution and biological status of Japanese sardine during a scientific survey, carried out in the Pacific Ocean waters of the Southern Kuril Islands in October 2019. The article analyzes Japanese sardine nutrition in the feeding grounds.

Based on the materials collected in 2010-2021, the ecology, the current state of the stock and some features of the biology of the flounders exploited by fishing, living in the northern part of the Sea of Okhotsk, are considered. A brief biological characteristic of their age and size-weight indicators, as well as the sex ratio, is given. The prospects of industrial development are shown.

The process of fishing for the Commander squid and its features related to the hydrology of the Sea of Japan are considered. The areas and time of fishing in the Russian zone have been determined. The periodicity of the approach of commercial aggregations of the Commander squid by months along the continental slopes from the south of Western Sakhalin to the north of the Tatar Strait and further along the coast of Primorye to the south was revealed. Studies of the processes of interaction between trawls and aggregations of squid showed a calm behavior of the squid when interacting with the trawl and the squid leaving at a low speed into the pelagial. This made it possible to determine the choice of the parameters of the net cloths in the front part of the trawls (mesh pitch 100 mm and 60 mm), the speed of trawling more than 3 knots, as well as the minimum vertical openings of bottom trawls of 10-12 m. A scheme for the operation of small vessels using a single-wire system is proposed.

The Black Sea sprat Sprattus sprattus phalericus (Risso) and temperature factor impact have been investigated. Statistical assessment of the long-term dynamics (1951–2019) of a relationship between the temperature factor and sprat mean weight in fishery catches used as a population quality characteristic has been performed. Pearson product-moment correlation and cross-correlation was evaluated, then data series was smoothed by the local polynomial regression and, finally, a linear model was fitted. The correlation test shows significant relationship between the temperature factor and sprat mean weight-at-age (mean weight in 3+ age group and SST in the port of Yalta resulted in r = -0.86, whereas average SST and average mean weight by age classes led to r = -0.74). The fitted linear model by smoothed data of average SST and average weightat-age successfully passed diagnostics (R² = 0.87, RSE = 0.34), with the equation: w = f(sst) = 22.23 - 1.263*sst. As a result, this study allows to emphasize the temperature factor as a main driver of the sprat fishery quality characteristics. The global warming effect, starting since the 1990’s has had a significant negative impact on the sprat population.

After many years of interruptions, sonar surveys of the main fishing areas of Lake Baikal were carried out: Selenginsky shallow water and Northern Baikal. When performing hydroacoustic research and data processing, a Simrad EY500 scientific echo sounder with a frequency of 70 kHz and with an ES 70-11 antenna (split beam), a domestic GIS "CartMaster" with a hydroacoustic database was used. In the area of the Selenginsky shallow water, accumulations of omul were recorded in the depth range from 70 to 300 meters. In the water area of 145,010 hectares, the number of omul was 11386970, and its biomass was 4108 tons. The maximum registrations of omul accumulations per unit of distance traveled on Northern Baikal were higher compared to the Selenga shallow water. The densest accumulations of omul were recorded in the depth range from 120 to 250 meters. In the water area of 14695 hectares, the number of omul was 6370,540, and its biomass was 992 tons.

The results of hydroacoustic surveys turned out to be comparable with the results of biological studies and on the basis of which it can be assumed that the decline in abundance and biomass has stopped. There is an increase in spawning herds and the number of larvae, which means that we can expect an increase in the total biomass in the foreseeable future.

Salmon fishing in the lower reaches of the Northern Dvina River is based on the use of the spawning part of the Atlantic salmon population. Fisheries regulation measures are developed using knowledge of the biology of the species. Thus, the aim of the research is a comprehensive understanding of the biology of the spawning part of the salmon population in the Northern Dvina River basin based on the generalization of materials from commercial catches for the period 1931-2014. After feeding in the northeastern part of the Atlantic Ocean, adult salmon return to spawn at the age of 5+. The reproductive part of salmon populations is dominated by females. The average size and weight indicators of salmon making spawning migrations are 77,42 cm and 5,43 kg. It has been established that in the last decade of observations, the size and weight characteristics of the reproductive part of the Atlantic salmon populations in the Severodvinsk basin have stabilized. This allows us to conclude that there are effective measures to regulate the legal salmon fishery.

The work is a summary of the literature data on the study of phylometroidosis, a helminthic disease of fish, the causative agent of which is the viviparous nematodes PhilometroideslusianaVismanis, 1966. On the territory of the Russian Federation, the disease belongs to the list of quarantine ones, therefore, as a result of the detection of the pathogen, restrictive measures are applied to the fish farm in order to prevent it further distribution. Nematodes have a mechanical and toxic effect on the body of fish: they injure the liver and kidney tissues, blood capillaries, swim bladder, and release toxins. In older fish, during the migration of the parasite, the skin is destroyed, ulcers may appear, after which the invasion may be complicated by the addition of pathogenic microf lora (bacteria and fungi) circulating in the water. Anthelmintics are used to treat phylometroidosis.

Feed biotechnologies from microand macroalgae for trepang mariculture have been developed. The results of production tests confirmed their effectiveness in the industrial rearing of juvenile trepang. The use of feed gives an increase in the growth of juvenile trepang by 5.7 times with a decrease in the feed coefficient. Approbation of biotechnology has shown the feasibility of mass production of the developed feed for trepang mariculture.

Optimization of the nutritional formulation for the cultivation of Rhodotorula spp yeast was carried out. using the theory of experimental planning. Optimal values of process factors (prescription components) are obtained: mass fraction of spirulina -0.62%; hemp protein 0.37%, at which the response function (yeast biomass) reaches an optimal value of 31.25 g / l. The development of the domestic feed base according to the obtained methodology will solve the problem of providing feeds that increase the viability of the cultivated object, and ensure a stable supply of feed based on sea yeast Rhodotorula benthica to mariculture enterprises.

The paper considers two nonlinear phenomena studied in the framework of the theory of catastrophes, which are present in the practice of the fleet and relate to various aspects of logistics energy recovery due to the "soliton" thrust of the body and the formal image of the current impact of the covid-19 coronavirus pandemic. Their corre-spondence to the catastrophes of folding and assembly is shown.

The aim of the study is to assess the eating behavior of preschoolers and schoolchildren when organizing two hot meals a day according to the system of free choice of buffet dishes, modeling the calculation of the inediency index of food waste (FW) dishes, including the analysis of demand and consumption of fish dishes in the school cafeteria by consumers of different age groups. The article provides up-to-date information on the volume of consumption of fish products recommended by sanitary rules and regulations for catering for preschool and school-age children. In the course of the study of consumer preferences on the example of a private school and kindergarten, the main reasons and patterns of unpopularity of fish dishes among preschoolers and schoolchildren were established, as a consequence of inf luencing the growth of the "inedibility index" of dishes in the school cafeteria. The questionnaire method obtained data on the main reasons for the unpopularity of fish dishes: in the first place, 54% of refusals among children aged 7-11 years are associated with the unpleasant smell of these dishes. Organoleptic evaluation of fish dishes showed that in order to increase the demand for consumption of these dishes, it is necessary to increase their taste advantages. It was found that 58% of preschool children and 54% of children aged 7-11 years do not like the fishy smell. The same trend is observed for the other groups. To reduce the "inedibility index", the development of an up-to-date "recipe bank" of fish dishes is required. Raising awareness of the population about the benefits of fish and its quality criteria does not exclude the possibility of developing a wide range of fish semi-finished products of industrial production that will meet the requirements of a healthy diet of the population.

Improvement of technical documentation for products from aquatic biological resources is of particular relevance and importance in the framework of creating a system for managing the quality and safety of fish products. An important element of technical regulation is standardization a quality assurance tool that regulates safety indicators and basic technical requirements for the product itself. Updating standardization documents for traditional food fish preserves based on modern safety and the achievements of industry science is an urgent task and one of the factors causing quality and usefulness problems.

The article analyzes the proposed industry and national recipes for preserves from separate fish and develops an interstate standard GOST 7453-86 “Preserves from separate fish. Specifications". The requirements for safety and quality of preserves from separate fish in filling, sauce and oil are determined.