The purpose of the study is to establish the maximum life span (t_max) and natural mortality (M) in commercial Lithodidae using the example of the red king crab Paralithodes camtschaticus.

Material and methods — after the introduction of P. camtschaticus into the Barents Sea in 1969, the dynamics of the maximum carapace width (CW_max) from the first crab catches in 1974 to 2022 was considered. The data of the authors’ own observations and the results of studies from the open press were used.

Results. The retrospective dynamics of the maximum size of crabs for older ages for 1974–2022 is presented. The maximum sizes were established: in males CW_max 280–312 and 298 mm was in 2002 and 2003, and in females CW_max 210–220 mm in 1995, 1998 and in a later period.

New data. Based on the fifty-year dynamics of CW_max, it was suggested that after the end of the acclimatization of P. camtschaticus in 1969, the first generation of local juveniles appeared in the area of introduction in the early 1970s; in the absence of fishing, these juveniles were able to freely reach the maximum historical size and maximum age. Males caught in 2002–2003 with CW_max 280–312 mm, could have been 30–33 years old (mean 31 years), and the age of females in 1995 with CW_max 210 mm was 20–25 years (mean 23 years). This age limit of crabs allows us to establish a natural mortality according to the formula М=3/t_max for crabs with CW ≥70–90 mm, when their natural elimination is minimal. In this case, the decrease in M in males will be 10% per year, and in females 13%.

Practical significance. To estimate the commercial stock of P. camtschaticus, the values of natural mortality used today are 1.8–2.3 times higher than M established by t_max for this species in the Barents Sea. The use of a double overestimated value of M in model calculations leads to a decrease in the commercial stock of crab and, as a consequence, to a decrease in its total allowable catch.

The purpose of the work is to assessment the state of stocks of the green sea urchin (Strongylocentrotus droebachiensis) in the coastal zone of the Barents Sea.

Methods used — to achieve the set goal, standard methods for collecting hydrobiological material and calculating the abundance and biomass of hydrobionts were used.

Novelty — the data obtained as a result of the research made it possible to update information on the state of the green sea urchin stocks on the coasts of Western and Eastern Murman.

Results — the total and commercial reserves of sea urchin were determined on an area of 2812 thousand m2. The total stock of sea urchins was 3.58 thousand tons, the commercial one — 2.17 thousand tons. The total density of urchins in the studied water area was 32 specimens/m², the commercial one — 10.3 specimens/m². The most promising areas for fishing have been identified.

Practical significance — thanks to the use of the research results, adding them to materials from other sources, it will be possible to more accurately predict the volumes and timing of fishing. Mining companies will receive more complete information about promising fishing areas and possible catch volumes.

The purpose: to obtain modern data on the distribution, abundance, size composition and biological state of the sturgeon in the middle reaches of the Lena River.

Material: data of scientific accounting survey using bottom drift nets in summer 2022.

The results: Siberien sturgeon is dstributed irregularly on a 400‑kilometer stretch of the river from the city of Yakutsk to the Vilyui River, with the highest average density near the Vilyui River mouth 163 ind./km², while sturgeon densities in the areas of Yakutsk and the Aldan River mouth were 71 and 44 ind./km² respectively. The highest density of fish with the smallest average size in the area near the Vilyui mouth indirectly indicates the presence of a separate herd in the Vilyui River. The average density of fish over the entire 400‑km area was 93 ind./km². The sturgeon length to the end of the middle rays (ac) was from 21 to 86 cm; on average 43.4 ± 10.7 cm. The modal size class for the sturgeon in catches in 2022 was 41–50 cm (44% of the total catch). The fish weight ranged from 40 to 3800 g. The average weight of individuals was 0.557. More than 80% of fish from all catches weighed up to 700 g. The weight of fish with a length ac 62–71 cm ranged from 0,400 to 1.415 kg, on average 1.0 kg. There were only 2.5% of commercial individuals in the total harvest. Sexually mature females were noted only near the Aldan mouth, where their share was 11% that may indicate the presence of spawning grounds in its channel. In the sample of fish that underwent a complete biological analysis (one third of the catches), sexually mature males were not observed. Estimated number of sturgeon: in Yakutsk city area — 17000 ind., in the Aldan mouth area — 47000 ind., in the Vilyui mouth area — 55000 ind. The total number of Siberian sturgeon on a 400‑kilometer stretch of the Lena River was at least 120000 ind. The state and structure of sturgeon population corresponds to the average statistical retrospective data.

Practical value: the results obtained will improve the efficiency of assessing the distribution and stock of sturgeon in the Lena River.

The purpose of the review is to summarize modern data on the phylogenetic relationships of two sturgeon species, the North American Atlantic sturgeon Acipenser oxyrinchus and the European Atlantic sturgeon A. sturio, living in the Baltic Sea, due to the complete loss of A. sturio and the presence of a small number of individuals of A. oxyrinchus.

Methods used: comparative analysis of modern literature data, a deconstruction method in which studies reflecting the molecular genetic characteristics of species have been carefully selected.

The result of the review is structured data on molecular genetic studies of two sturgeon species. Combining research methods conducted with these species in one review.

Significance: The results of the generalization are necessary for organizing measures to restore the lost population of sturgeon that lived in the water bodies of the Baltic Sea basin and was lost due to overfishing and changes in the habitat. A systematic approach to the molecular genetic labeling of fish both in the wild and in fish farms will ensure the control of the released juveniles, which will facilitate further research in this field of science.

The purpose of this work was to characterize the biological and commercial indicators of arabesque greenling in the Kunashir Strait during 1998–2022.

The basic material for the article was the data collected during the net fishery of arabesque greenling by the fleet of small-tonnage vessels of the Japanese fishing cooperative in the city of Rausu in the eastern (Russian) zone of the Kunashir Strait.

Results: It is shown that the stock resources of arabesque greenling in the waters of the southern Kuril Islands have been declining during for a long period of time. Despite a short-term growth of catch per effort in 2018–2021, in 2022 there was again a decrease of fishery indicators. The negative trend of catch per effort is directly associated with the features of dynamics of arabesque greenling resources distributed in Kunashir Strait and in the Sea of Okhotsk waters of Hokkaido.

Practical significance: The new information makes it possible to determine the current trends in total biomass changing for commercial fish and to clarify the fishery capabilities of the area in the nearest future.

The aim of the work was to select and test several pairs of primers to identify the causative agent of A. salmonicida salmon furunculosis by PCR.

The methods: six bacterial cultures isolated from pre-spawning chum salmon with and without external signs of furunculosis, caught in rivers in the south of Sakhalin, were used as test cultures during the testing of primers. Ready-made kits D-Cells‑250 and Intifica TaqM master mix were used to isolate bacterial DNA and prepare PCR mixtures. Amplification was carried out in a thermocycler T‑100 ThermoCycler (Bio-Rad). Detection of PCR products was carried out by electrophoresis in 1.5% agarose gel in triacetate buffer (TAE). To view the results and document them, the Bio-Rad Gel DOC XR+system was used.

The results: the species specificity of three pairs of primers selected for the identification of the causative agent of furunculosis by PCR was experimentally confirmed. Testing of the selected primers was carried out on bacterial cultures isolated from pre-spawning chum salmon individuals with and without manifestations of furunculosis. According to the results of testing, all bacterial isolates were assigned to the species A. salmonicida.

Novelty of the work: for the first time, a comparison of primers proposed by several authors for the identification of the causative agent of furunculosis was performed on bacterial cultures isolated from salmon of the Far Eastern region.

Practical significance: the obtained results were used to prepare methodological guidelines for the identification of the causative agent of salmon furunculosis A. salmonicida by PCR, which reduces the time of diagnosis of the disease.

The purpose of the work is to describe the morphological features and time frame of otolith formation in pike embryos for subsequent use of otolith marking for juveniles released to the nature habitats. Observations of the development of eggs were carried out in aquarium conditions. The recirculating aquaculture system was used for incubation of pike eggs. The development of embryos and larvae, as well as preparations of otoliths, were examined using light microscope equipped with digital camera. The sizes of developing embryos, larvae and otoliths were measured in photographs, the scale of the images was determined using reference scale. It was found that the beginnings of hearing organs in form of otic vesicle are formed in pike embryos at the stage of organogenesis on the 6th day of development at the temperature of 9–13 °С. The detectable sign of the processes is the beginning of pigmentation of the embryo’s eyes. The formation of otoliths such as sagittae and lapilluses due to the fusion of primordial spherules and enlargement of globules continues throughout the entire period of embryonic development. By the moment of pre-larvae hatching (on the 10th day after fertilization), they have two pairs of otoliths (sagittae and lapilluses), the average size of which is 66,3±5,1 microns and 53,3±5,3, respectively. The appearance of diurnal rings on otoliths is observed before hatching, at the stage of the mobile embryo or on the first day after hatching. The data on the age of formation of otoliths and appearance of diurnal rings will be used to develop techniques of marking of pike juveniles in the hatcheries.

The purpose of the work: identification of acoustic activity of belugas in conditions of aviary keeping and justification of the possibility of using their signals in fishing.

The material of research was digital audio recordings of hydroacoustic signals of belugas collected from 2016 to 2018.

Methods used: analysis of hydroacoustic data, visualization of the daily acoustic activity of belugas in different seasons, identification of stereotypes of acoustic behavior and characteristic signals in captive conditions and during fish hunting. Novelty: for the first time a substantiation for the possibility of using signals of one of the species of toothed whales — belugas registered in the captive conditions, to influence on the behavior of hydrobionts and solve practical problems of fishing and fish protection is given.

Results: the highest acoustic activity of white whales is observed during the day and noticeably decreases at night with increase and decrease in the morning and evening hours. Maximum acoustic activity precedes the feeding of dolphins.

The most common tones are those containing the fundamental frequency and harmonics. Characteristic features of the sounds are high variability of duration from 0.25 to 2.5 s, pronounced frequency components in the 500–2500 Hz spectrum zones, amplitude and frequency modulation, sound pressure levels of the signal up to 500 Pa /1 m.

Acoustic activity of belugas during fish hunting and in the period preceding feeding in captive conditions, stereotypical. Typical are low-frequency frequency-modulated calls and whistles in the hearing range of fish, as well as a curtain of air bubbles and body and tail slaps. Possible ways of using beluga whale signals to increase the efficiency of fishing are proposed.

Practical significance: the results of the study open up the possibility of using the signals of belugas to remotely control the movement of fish, create artificial concentrations and deterrent of hydrobionts in the intended areas.

Aim. Find a simple way to transfer the average per capita consumption of fish products (kg/person/year) from the raw mass to the mass of marketable products and vice versa.

Methods. Statistical processing of official data on the consumption of fish products in the USSR and the Russian Federation, published by Rosstat (Russian Federal State Statistics Service) and FAO (Food and Agriculture Organization of the United Nations) for 58 years, was made using the least squares method.

Results. Two-parameter equations are found that best describe the relationship between the average per capita consumption of fish products in the mass of raw fish and in the mass of commercial products ready for consumption, as well as coefficients for simplified approximate quick calculations of the mass of consumed raw fish by the mass of commercial products and the mass of consumed commercial products by mass of raw fish.

Novelty. Based on the results of the original analysis of the material, a new method for recalculating the Russian per capita consumption of fish products in the mass of raw fish by the mass of consumed commercial products and vice versa was obtained for the first time.

Practical significance. Restoration of long-term series of consumption and targets for food security, the efficiency of the functioning of the fishery complex, and the social policy of the state. The article may be useful to economists, marketers, sociologists, medicals, businessmen, officials and politicians.

The goal of the work is to identify the roots of the significant decrease in the catch of saury by Russian vessels in the Kuril waters from 2015 to the present, as well as factors influencing the distribution of this fish in the northwestern part of the Pacific Ocean.

Methods used: the work is based on materials on the distribution of saury schools in the northwestern part of the Pacific Ocean obtained during expeditions on fishing vessels, and trawl surveys on vessels of the Pacific branch of VNIRO (TINRO) from 2012 to 2021. To assess the position of fishing areas and the efficiency of saury fishing, fishing statistics data for 2012–2021 were used in the northwestern part of the Pacific Ocean according to vessel daily reports (VDR) and ship positions of the monitoring system of Rosrybolovstvo.

Novelty: the work presents the results of the Russian fishery in recent years, and evaluates the effectiveness of the fishery. Based on an analysis of the literature of recent years and data obtained on expeditions to the northwestern part of the Pacific Ocean, the reasons for the decrease in saury catch by Russian fishermen over the past 5 years are considered.

Result: The main reasons that caused the shift of the main feeding areas of saury far to the east and north in recent years are global climate and oceanological changes in the Northwestern part of the Pacific Ocean. In addition to the abiotic factors of the pelagic fish habitat, their distribution is also influenced by the interspecific interaction of competing fish with high stock. A large number of factors, both abiotic and biotic, affect the change in the pattern of migration routes and the position of saury feeding areas in the North Pacific Ocean, which ultimately makes it much more difficult to predict the distribution of fishing grounds.

Practical significance: the results obtained will be used for further studies of the population dynamics of saury in the North Pacific Ocean.

The aim of this article: analysis of information and software for forecasting of the Baltic Sea sprat stock Sprattus sprattus balticus at 22–32 ICES subdivisions in the context of the suspension of Russia’s activities in the International Council for the Exploration of the Sea (ICES).

Methods used: The data of estimates of sprat abundance and biomass by hydroacoustic methods, commercial and biostatistical characteristics of the species were used to assess the stock and predict its catch in the Baltic Sea. Estimation of the sprat stock was carried out using the traditional method of virtual population analysis (VPA) adjusted according to the method of extended survival analysis (XSA) using the internationally approved VPA module software within the framework of ICES and the R software environment. The recruitment calibration program RCT3 (Recruitment calibration) was used for the abundance of recruitment (age 1 year) according to XSA and forecast. A multivariate short-term forecast was carried out at different levels of development of the total allowable catch (TAC) under the MFDP program (Multi Fleet Deterministic Projection). As an alternative, the domestic software «KAFKA» was tested.

Novelty: for the first time, estimates of the sprat stock were made in the conditions of limited access of Russian specialists to primary data in ICES in full.

Result: modern methodological and informational support of scientific research in the Baltic Sea in the conditions of the suspension of the activities of Russian experts in ICES makes it possible to obtain information in the minimum necessary amount for assessing the stock of sprat and predicting its catch. Modeling with the «KAFKA» software showed satisfactory results.

Practical significance: The current level of information support for forecasting the state of the stock and catch of sprat in the Baltic Sea will allow solving a complex of problems of managing this resource in modern conditions.

The aim of the work: to identify behavioral responses that make it possible to characterize the food attractiveness of potential feeding objects for juveniles of the crayfish Cherax quadricarinatus.

Used methods: the study was conducted on the juvenile Australian red-clawed crayfish C. quadricarinatus, in the aquarium room of aquaculture invertebrate department at VNIRO. 11 types of feeding objects of plant and 4 types of animal origin were studied, as well as TetraWaferMix compound feed as a control. A total of 616 experiments were performed.

Newness: on the juveniles of the Australian red-clawed crayfish C. quadricarinatus, the methodology for assessing the nutritional attractiveness of feeding objects by the nature of behavior during feed consumption was tested.

Result: the experiments conducted showed that a large proportion of individuals who threw, crumbled, held food with their oral limbs for a long time without attempting to mechanical processing it or did not eat the food, indicates its unsatisfactory nutritional qualities. The time spent by crayfish on eating food depends on the hardness of the proposed components, the rate of their softening in water, the size of individuals and therefore cannot directly characterize the nutritional attractiveness of the feed. Most of the proposed forage objects (11 out of 15) had attractive nutritional characteristics for juveniles of C. quadricarinatus crayfish. The most active juveniles consumed animal feed (larvae of Chironomus sp. and Hermetia illucens, squid meat, Gammarus sp.), and among the feeds of plant origin, the seeds of oats, wheat and fried buckwheat, as well as beets and potatoes had the greatest attractiveness.

The purpose of the work: to study the effect of water with different sodium chloride content on the main biological parameters of the juvenile Australian red-clawed crayfish Cherax quadricarinatus.

Methods used: when performing experimental work for 30 days, the main biological characteristics of juvenile C. quadricarinatus with an initial mass of 0.64±0.27 g and a length of 31±5 mm were determined when it was grown in water with a sodium chloride content of 0, 5, 10 and 15 g/l and controlled the survival, growth, physiological state of individuals.

Novelty: the novelty elements of the presented study are the identification of the negative effect of water with a sodium chloride concentration of 5–15 g/l on survival, size, mass and physiological characteristics of juveniles.

Result: the survival rate of the studied juveniles on the 30th day of the experiment in fresh water was 65%. In water with a sodium chloride content of 5 g/l, the indicator was significantly lower — 23.3%. In the variants of the experiment with higher salt concentrations (10.15 g/l NaCl), by the 20th day all individuals died. The average weight of individuals (1.70±0.80 g) in the control group increased by an average of 166% from the baseline (0.64±0.27 g). Lower mass values were obtained at a salt content of 5 g/l — 1.00±0.49 g. This result was significantly (p<0.05) lower by 41% than in the control group. During the experiment, the average length of individuals (43±8 mm) in the control group increased by an average of 39% from the original (31±5.0 mm). The concentration of hemocyanin in juveniles contained in water with a salinity of 5 g/l is lower than in the control group by 16%. External signs of the development of rust-spotted disease have been identified. Practical significance: the results obtained can be used in the cultivation of the C. quadricarinatus. It is considered acceptable to keep crayfish juveniles in water with a sodium chloride concentration of not more than 5 g/l for 10 days. Keywords: crustaceans, Cherax quadricarinatus, juvenile, hemolymph, hemocyanin, sodium chloride, melanization, fungal disease>˂ 0.05) lower by 41% than in the control group. During the experiment, the average length of individuals (43±8 mm) in the control group increased by an average of 39% from the original (31±5.0 mm). The concentration of hemocyanin in juveniles contained in water with a salinity of 5 g/l is lower than in the control group by 16%. External signs of the development of rust-spotted disease have been identified.

Practical significance: the results obtained can be used in the cultivation of the C. quadricarinatus. It is considered acceptable to keep crayfish juveniles in water with a sodium chloride concentration of not more than 5 g/l for 10 days.

Aim: to assessed the readiness of Chinook salmon fingerlings reared at the Malkinskiy salmon hatchery (Kamchatka region) to seawater run and to reverse water-salt transport; to develop a rapid and effective method to determine the readiness of juvenile Chinook salmon to seawater run.

Methods: the dynamics of haemoglobin, glucose, haematocrit, blood osmolarity and body weight were studied in juvenile of Chinook salmon of a different sizes exposed in water with salinities of 30 and 40% (experiments in fresh water under the same conditions served as a control, all experiments were carried out in three repetitions).

Novelty: a method is described to assess the readiness of juvenile salmonids with a prolonged freshwater period of life to sea water run.

Results: the standard “salinity test” does not always reflect the readiness of juveniles to run, and to clarify their physiological state, it is worth studing the dynamics of blood osmolarity during exposure to water with a salinity of 30% (the critical indicator is 340 mOsm l‑1 after a day of experiment). Blood levels of glucose, hemoglobin and hematocrit, as well as the dynamics of body weight are not suitable for assessing salt resistance because off the excessive sensitivity of these indicators. It was shown that juvenile Chinook weighing ≥ 7 g were physiologically ready for run, whereas juveniles weighing ≤ 5 g were not. The intermediate group (5–7 g) exhibited different physiological states in different years.

Practical importance: determining the minimum size of fully transformed smolts and finding ways to increase the salt tolerance of juveniles is the way to increase the profitability of the hatchery.

The aim of the study was to develop therapeutic measures to combat bacterial hemorrhagic septicemia of fish using a complex of antibacterial drugs “Levofloxacin” and “Chlortetracycline”.

Methods used: experiments were carried out in aquarium conditions on juvenile carp and hybrids «Siberian sturgeon×Kaluga» (hereinafter hybrid SO×K) infected with a mixed culture of pathogens: highly pathogenic strains of Aeromonas sp., strains of R.R. Acinetobacter and Citrobacter. In the experiment, 2 variants of the use of antibiotics for a course of 7 days were tested. Bacteriological seeding of fish parenchymal organ samples was carried out on nutrient and differential diagnostic media.

Novelty: it consists in working out the scheme of application for fish of a complex of new antibiotics for aquaculture.

Results: the results of the evaluation of the therapeutic effect of antibiotics “Levofloxacin” + “Chlortetracycline” in the treatment of bacterial hemorrhagic septicemia are presented. The cessation of fish death was noted the next day after the start of therapy. Positive results were obtained in carp — with a combination of levofloxacin at a dosage of 1000 mg/kg of ichthyomass and chlortetracycline — 100 mg/kg of ichthyomass, in a hybrid of SO×K — 500 mg/kg of ichthyomass of levofloxacin + 200 mg/kg of ichthyomass of chlortetracycline. Evaluation of their combinations with different dosages did not show 100% effect. The difficulties of therapy have been identified, which are associated with the spread of strains of microorganisms resistant to antibacterial drugs.

Practical significance: the developed method of therapy is effective, reduces the damage from the disease and can be recommended when developing measures to combat bacterial hemorrhagic septicemia in fish in aquaculture.

The purpose of the work: to estimate fish breeding indicators of three hybrid forms of whitefish in comparison with parental species when grown in cage aquaculture.

Methods used: the production and cultivation of hybrids and parental species were carried out using standard technology for whitefish from November 2021 to May 2022. We have studied the survival and growth rate of fingerlings, and we also conducted a comparative assessment of the exterior of yearlings using factor and cluster analyses.

Novelty: for the first time, three hybrid forms of peled and parent species (peled, muksun, broad whitefish, nelma) were grown in cages, and a comparative analysis of survival, growth and morphology of hybrids and parent species was performed.

Results: all hybrid forms occupy an intermediate position in terms of growth rate, surpassing the maternal species (peled), yielding to the paternal ones. The best results in terms of weight and linear growth among hybrids were noted in pelchir. In terms of survival, oneyearlings of all hybrids show the effect of heterosis, although at the stage of larvae and early juveniles, the superiority in survival of hybrid forms over the parental pair was noted only in pelnelm. The survival rate of hybrid eggs, as well as the survival rate of pelchir and pelmuk at the early stages of cultivation, had intermediate values — lower than that of peled, but significantly higher than that of paternal species. The lowest survival rate of eggs among hybrids is shown in pelchir. The peled has the most significant morphological differences from other pure species and hybrid forms used in the experiment, all hybrid forms show more similarity with the paternal species.

Practical significance: results provide a potential assessment of whitefish hybrids for the prospect of their use in commercial aquaculture.

This study aims to identify the total mercury content in the muscle and hepatopancreas of the main commercial crustaceans from the Barents Sea.

The material for this study was the samples of red king crab Paralithodes camtschaticus and northern shrimp Pandalus borealis caught during the research cruises conducted by “PINRO” from 2012 to 2022. This study examines the samples of muscle collected from crustaceans, as well as the samples of hepatopancreas collected from the red king crab.

Novelty: This study involves abundant data that was used to make the first comparative analysis of the Hg concentration in red king crab and northern shrimp. A significant similarity in the levels of Hg content in the muscle of shrimp and crab at the mean level was shown. The paper provides maps of average Hg content in the studied species for the entire Barents Sea.

Methods used: the total mercury content in the samples was estimated by flameless atomic absorption spectroscopy analysis using Shimadzu Cold Vapor Atomic Absorption Spectrophotometer (Japan). Statistical data processing and charting were done using MS Excel and application software package of Statistica 13.

Results: The paper shows that the average concentration of Hg in the muscle and hepatopancreas of the studied hydrobionts did not exceed 0.2 mg/kg of wet weight that is the acceptable concentration established by sanitary standards. The content of Hg in the red king crab’ hepatopancreas was about 2 times higher than in the muscle. The paper makes an assumption on the species-specifity of Hg content in the red king crab’ muscle. The Hg content in the muscle of P. borealis is strongly related to its fattiness. The paper suggests calculated background levels of the total Hg concentration in the muscle of P. camtschaticus and P. borealis from the Barents Sea.

Practical relevance: The results obtained were used to establish the safety compliance of commercial crustaceans with the requirements adopted in Russia.

The purpose of the work is to create software for calculating the structural, geometric and strength characteristics of mesh bottom trawl structures, intended for modeling technological and hydrodynamic processes of trawl structures.

Methods used: The software “Calculation of the structural, technological and power characteristics of a bottom mesh trawl” is written in C++ in the Embarcadero RAD Studio software development environment and is designed to run on the Microsoft Windows 10 operating system.

Novelty: based on the results of experimental studies, mathematical and simulation models of the mechanics of trawl structures were analyzed for the first time and software was developed that allows calculating the characteristics of mesh trawl structures, including material costs for the manufacture of trawl structures.

Result: The software displays the static process of trawling a mesh bottom trawl, as well as the output technological (for the technologist), geometric and power (for the designer) characteristics.

Practical significance: the developed software is expected to be used in the future as a simulator module for training aquatic organisms getters, trawl masters and assistant captains for production.

Purpose of the work: consideration of the system-structured characteristics of intrapreneurship in the context of the search for additional levers and opportunities for the development of the domestic sector of fisheries and fish farming.

Research methods: integrated and systematic approaches, general logical methods, in particular, analysis and synthesis, abstraction and generalization, induction and deduction, which made it possible to identify and systematically structure the elements of intrapreneurship in the field of fisheries and aquaculture, as well as to expand general scientific knowledge about intrapreneurship, its essence, principles, forms of implementation and adapt them to the specifics of fisheries.

The scientific novelty of the research results lies in the consideration of intrapreneurship as an element of the intellectual capital of a fishery enterprise; in the systematization and structuring of such characteristics of intrapreneurship in fisheries and fish farming as a team contract, on-farm commercial settlement and its tools.

Results of the study: the paper substantiates the possibility of implementing intrapreneurship at fisheries and aquaculture enterprises, due to the two-level management system and the features of the brigade form of labor organization; the relevance of the economic category “team contract” in the current conditions of fisheries is shown, which predetermines the practical significance of the results of the study, which is also supplemented by an analysis of the features and possibilities of transfer pricing, taking into account the specifics of fisheries.

Objective: to reflect the retrospective, current and prospective state of the fishing industry in China, to assess the existing trends and highlight their key factors.

Method: general scientific methods of analysis and synthesis, as well as methods of statistical processing, analysis and visualization of data were used.

Novelty: the main factors and conditions that ensure the progressive growth of the fishing industry in China are identified; a forecast model for the growth of fish production is constructed.

Results: The key indicators of China’s fishing industry in retrospect and the current state are analyzed; a quantitative characteristic of China’s position in the global fishing industry and trade in fish products is given; a quarterly forecast of the output of the country’s fishing industry is constructed based on modeling of dynamics series with seasonal components. The key guidelines of the Chinese government regarding the development of the industry, implemented within the framework of five-year planning, aimed at reducing the burden on the environment, restructuring the industry towards increasing the scale of aquaculture, qualitative improvement of the industry on the basis of innovative technological potential and scientific developments, are disclosed.

Conclusions are drawn about the multiplicative effect of modern transformations in the fishing industry of China, significant both for the national and for the global economy as a whole.