The study of the biological features and growth of the bream Abramis brama in the Uglich reservoir was carried out on the basis of long-term data (2012-2024, n = 1888) using historical materials from 1972-1974. It was found that the harvested part of the population is represented by individuals aged 2+ to 14+ years with a predominance of groups 5+-8+ (70,9%), the average length is 25,7 cm, weight is 395 g. The sex ratio (1:0,7 in favor of females) corresponds to the first type according to D.F. Zamakhaev. The dependence of mass on length is described by the isometric equation W=0,020L^3,007 (R² = 0,97), which indicates balanced feeding conditions. The parameters of the Bertalanffy equation (Linf=33,84 cm, K=0,31) indicate an acceleration in the growth rate compared to the 1970s (K=0,12) with a decrease in the asymptotic length. The use of the LBI (Length-Based Indicators) indicator method has shown that after the partial cessation of fishing (prohibition since 2007 in the Tver region), all five indicators consistently exceed the targets (the «green zone»), reflecting the restoration of the age structure and the high reproductive potential of the population. The biomass of bream ranged from 2,02 to 3,38 thousand tons, stabilizing after 2021 above 2,3 thousand tons. Unlike the Ivankovo reservoir, no density-dependent growth inhibition was detected in the Uglich reservoir, which is explained by the rich forage base (including dreissen reserves) and the positive impact of climate change. The results update the data for fisheries management and conservation of biodiversity of ecosystems of the Upper Volga.

Bream is a common but few representative of the ichthyofauna of the Desnogorsk reservoir. Its share in catches of fishing nets with mesh pitch from 30 to 70 mm during the period of accounting surveys in 2011–2025 ranged from 0,4 to 6% in number. Bream, in conditions of different temperature conditions in different parts of the cooling reservoir of the Smolensk NPP, is unevenly distributed over the reservoir area. The upper part of the reservoir serves as a breeding area for bream, and the lower part serves as a place for round-the-clock feeding due to the elevated temperature regime of the warm discharge waters of the Smolensk NPP. The results of a complete biological analysis of bream samples from this reservoir show that in recent years there has been a more intensive growth of bream than 15 years ago, probably due not so much to an increase in productivity of benthic communities as to the activity of cage fish farms, in areas where an additional source of feed resources appears in the form of falling pellets of feed and feces of commercial fish. Despite the earlier puberty of bream in the cooling reservoir of the Smolensk NPP in comparison with other reservoirs of the Smolensk region, the increase in the growth of its population is hindered by the high incidence of ligulosis and digrammosis. For the same reason, bream is a secondary object of industrial and amateur fishing in the Desnogorsk reservoir.

The assessment of capelin consumption of aquatic organisms in the Bering Sea in the period from 1986 to 2020 was carried out. It was revealed that she eats most actively in the summer. At the same time, the food spectrum of its juveniles is similar to that of adults. In different seasons, different groups of zooplankton predominate in the capelin diet: euphausiids in autumn and winter, and copepods in spring and summer. To a lesser extent, hyperiids and sagittae are noted in capelin nutrition, the largest proportion of which was observed in winter. In total, capelin ate 22,3 million tons of fodder objects per year in the Bering Sea archipelago. It took only 2,9% of the gross stock and 0,9% of zooplankton production to ensure the annual capelin ration. During the period of the maximum capelin stock observed in the 1980s, 4,5% of the gross stock and 2,1% of zooplankton production were used to ensure its annual diet.

This study analyzes the long-term (1958–2024) dynamics of fishing and the composition of commercial catches of sabrefish (Pelecus cultratus) in the Russian part of the Curonian Lagoon of the Baltic Sea. It is shown that the species’ mean annual catch varies widely – from values close to zero to 482 t. In the period 2000–2016, the average catch of sabrefish was 311 t; since 2017 a decline has been observed, with an average of 197 t for 2017–2024. The fishing base comprises 52 aquatic resource users, 25 of whom hold quotas for sabrefish. The largest catches are provided by agricultural production cooperatives of fishing collective farms. In recent years, the mean sizeweight parameters of sabrefish in the catches have decreased. The stock status of the species over the past decade is assessed as good.

The article presents data on the mortality of Tatar Strait Pandalus hypsinotus during repeated dives and ascents in traps with closed entrances under conditions of spring homothermy and in experiments that emulate the temperature differences between the bottom and surface layers of the water in the Strait during the warm season. The article discusses the feasibility of releasing Pandalus hypsinotus individuals smaller than 130 mm in body length into the sea during trap fishing.

The review is devoted to the study of marine environmental pollution by microplastics and its negative impact on fish resources, food security and human health. Numerous studies are presented demonstrating the presence of microplastics in marine ecosystems and its effect on various types of marine organisms, including fish. The ways of microplastics penetration into food chains are described and possible consequences for human health are considered. The importance of continuing research and developing comprehensive measures to reduce the negative impact of microplastics on marine ecosystems and human health is emphasized.

The aim of this study was to characterize the blood parameters of rainbow trout to assess the impact of varying dietary polyunsaturated fatty acid ratios on the physiological status of fish. Based on an analysis of a complex of hematological and biochemical parameters in rainbow trout blood, the adaptive capabilities of fish to maintain a high metabolic rate and immune status were established when fed diets with varying ratios of vegetable oils and fish oil, including those deficient in essential long-chain polyunsaturated fatty acids. Quantitative characteristics of the level of vegetable oil addition to the feed were determined, ensuring the preservation and maintenance of the normal physiological status of trout.

The study investigated the effect of pea protein concentrate on the digestibility and assimilability of nutrients in compound feeds for rainbow trout reared in RAS conditions. It was found that the digestibility of the experimental compound feeds exceeded 92%, indicating their high bioavailability for rainbow trout. It was revealed that compound feeds containing 12–18% pea protein concentrate exhibited the best parameters of nutrient assimilability and metabolic costs among all studied samples, indicating greater efficiency of their utilization by rainbow trout. An increase in the pea protein concentrate content in the compound feeds led to improved assimilability and reduced metabolic costs for phosphorus and ash, which is a positive factor when using these feeds in RAS conditions.

The aim of the work was to create and test compound feeds with components based on invertebrates and algae for juvenile narrow-clawed crayfish. Two successive experiments were conducted on groups of juvenile narrow-clawed crayfish to test compound feeds produced by Russian Federation Research Institute of Fishery and Oceanography (VNIRO) with different components. In the first experiment, four variants of compound feeds were tested: KRRR-Base, KRRR-Gammarus, KRRR-Lion, KRRR-Chlorella; in the second experiment, two variants of compound feeds were tested: KRRR-Base and KRRR-Base + microplankton. The experiments lasted 30 and 37 days, respectively. At the end of the experiment, the survival rate, growth rate, feeding ratio and color intensity of the juveniles were evaluated. All tested compound feeds have shown high attractiveness for juveniles. The observed differences in height and survival were not statistically significant. During the experiment, the mass of individuals increased by an average of 2,8 times at a temperature of 22–23°C, and by 4,2 times at a temperature of 25–26° C. The best growth results were achieved using compound feed with a higher content of gammarus. The intensity of coloration of the individuals was low when feeding on compound feeds. The second experiment showed that including microplankton in the diet of the juveniles leads to the development of a rich natural coloration. The developed and tested formulations can be used to create starter and production compound feeds for narrow-clawed crayfish.

The paper presents the results of a revision of biological reference points for the management of red king crab (Paralithodes camtschaticus) and snow crab (Chionoecetes opilio) stocks in the Russian exclusive economic zone of the Barents Sea. The work is based on official catch time series and relative abundance indices for the periods 1994–2025 (for red king crab) and 2004–2025 (for snow crab). Using a Bayesian stochastic Schaefer surplus production model implemented in the JABBA package, a retrospective stock dynamics assessment, sensitivity analysis to prior parameter distributions, and projection modeling under various harvest scenarios were performed. Special attention is paid to methodological problems arising when assessing acclimatized populations: violation of the initial equilibrium condition, insufficient contrast in time series, and the need to distinguish between global and effective environmental carrying capacity. It has been established that the decline in commercial biomass of both species observed since 2020 reflects the end of the acclimatization outbreak phase and the transition to a new dynamic equilibrium. New estimates of reference points were obtained: for red king crab, MSY = 13,7 ktons, B_tr = 91 ktons, B_lim = 27 ktons, F_tr = 0,15; for snow crab, MSY = 17,7 ktons, B_tr = 116 ktons, B_lim = 35 ktons, F_tr = 0,15. Projection scenarios up to 2035 show that exceeding an annual catch of 14 thousand t for red king crab and 18 thousand t for snow crab is accompanied by an increased risk of the stock falling below the target reference point. The best balance between harvest level and stock conservation is provided by a dynamic harvest control rule with biomass feedback. The proposed reference points comply with the precautionary approach principles and are recommended for inclusion in regulatory documents governing crab fisheries in the Barents Sea.

The work presents an analysis of the Russian scientific observer system in fisheries in the SPRFMO area in the context of accreditation process within the aforementioned organization. A brief overview is made on the Russian fisheries in the South-Eastern Pacific Area. The analysis of the use of scientific observer data by the SPRFMO Commission is conducted. The work gives attention to the specification of the Russian scientific observer system in fisheries as a whole and within the SPRFMO Commission in particular. An algorithm for carrying out accreditation of the Russian scientific observer system in fisheries in the SPRFMO area is presented. Approaches to the development of the legal framework of the Russian scientific observer system are given.

This article explores ways to increase per capita fish and seafood consumption in Russia using modern technologies for processing raw fish into fish products that are in demand. Tools for saturating the domestic market with fish and seafood are proposed, based on the integrated use of aquatic biological resources and the application of innovative storage and processing technologies.

This article examines the socioeconomic consequences of fishery seasonality for coastal communities in Kamchatka Krai. It is shown that seasonal and interannual variations in catches, particularly for Pacific salmon, during the salmon run promote employment and income growth, while during the off-season, they exacerbate income instability, labor shortages, migration outflow, and underutilization of processing facilities. The negative impact of seasonality is compounded by infrastructure constraints, high logistics costs, and the increasing financial burden on enterprises. A comprehensive economic policy focused on developing year-round employment, onshore processing, and the logistics and social infrastructure of coastal communities is needed.