Industrial Catches Research Articles

Comparative analysis of fisheries and biological characteristics of bream (Abramis brama) in Saratov and Volgograd reservoirs

Based on the results of ichthyological surveys and industrial catch data, a comparative analysis of the commercial biological characteristics of bream in the Saratov and Volgograd reservoirs was carried out. The material was the results of expeditionary research by employees of the Saratov branch of the VNIRO. With the existing fishery, bream stocks are in a stable condition. The volumes of commercial stocks and catches of the species in question in the Volgograd Reservoir are higher than in the Saratov Reservoir. Despite differences in fishing intensity and characteristics of reservoirs, the size and weight indicators of the species are similar.

Fisheries in the Vologda region: current state and long-term dynamics of catches

The modern fisheries structure in the most important waterbodies of the Vologda region was discussed in the article. Regional characteristics of the main factors influencing industrial fisheries have been identified. The long-term dynamics of fish catches in the large lakes Beloye, Onega, Kubenskoye, Vozhe, reservoirs Rybinskoye and Sheksninskoye within the region were studied from 1973 to 2022. The importance of the main fish species for fisheries was established, and the seasonal dynamics of their industrial catch was examined. Amateur fisheries in the waterbodies of the Vologda region were described in the article.

The current state of industrial fishing in the Central Federal District of Russia and prospects for its development

The article considers a brief history of fishing and its current state in the reservoirs of the Central Federal District. For reservoirs and lakes of the Upper Volga and Oka basins, the dynamics of fish catch on average over the decades from the 60s of the twentieth century to 2023 are presented, and the dynamics of the species composition of industrial catches in these reservoirs is analyzed. The reasons that led to a decrease in the intensity of fishing or its closure in modern market conditions are considered. The description of the features of industrial fishing is presented by groups of reservoirs, depending on the area and volume of fish caught. The first group includes the large Upper Volga reservoirs (Rybinsk, Gorkovskoye), the average annual total catch in each of which exceeds 500 tons. The second group considers the reservoirs of the Upper Volga basin, in which 200–500 tons per year were caught during the Soviet period, and currently the volume of catch has decreased by an order of magnitude or fishing has stopped altogether. The third group of reservoirs includes small reservoirs of the Vazuz hydrotechnical system and cooling reservoirs of energy facilities, in which the volume of catch is currently less than 20 tons, but during their fishery development in the 70–80-ies of the twentieth century in the mode of «pasture fish farming» annual catches reached 100 tons. It has been established that the volume of industrial catch in most of the water bodies of the region has decreased over the two decades of the 21st century. The decline of industrial fishing in the Central Federal District is explained by a complex of socio-economic factors, the main of which is its unprofitability in market conditions, due to the low liquidity of most fishing facilities that form the basis of catch, the lack of the necessary number of catch processing enterprises and the cessation of subsidizing fish harvesters. The forecast of the further state of industrial fishing in the reservoirs of Central Russia is given.

Review of studies on the distribution of Antarctic krill accumulations in the Scotia Sea and analysis of mesoscale dynamics of its habitat

This article studies the mesoscale dynamics of the waters of the Scotia Sea, located at the northern tip of the Southern Ocean on its border with the Southern Atlantic Ocean. The Scotia Sea is one of the most promising fishing areas where the industrial catch of Antarctic krill (Euphausia superba) is produced. Since the distribution of commercial krill accumulations is largely determined by oceanological conditions, this paper analyzes mesoscale vortex dynamics, frontal zones, and topography in the Scotia Sea, affecting the creation of favorable oceanological conditions for the formation of commercial krill accumulations. The study is conducted using satellite and model data. It is shown that the distribution of sea level according to the GLORYS12v1 reanalysis data in the Scotia Sea has a zonal character. In winter and spring, sea level anomalies are positive (up to 20 cm), and in summer and autumn, they are negative (up to -180 cm). In the northwestern part of the Scotia Sea, according to the data of the GLORYS12v1 reanalysis for 1993-2020, thermal frontal zones with high repeatability (> 80%) are distinguished. Dynamic frontal zones are also distinguished in the northwestern part of the water area and have a repeatability reaching 100%. This area in the Scotia Sea is the most dynamically active: increased kinetic energy values are observed here. The increased dynamic activity in the northwestern part of the Scotia Sea, considered above by the average and average seasonal distributions of characteristics, is also confirmed in the synoptic range of periods. Spatial distributions of long-lived mesoscale vortices according to META 3.2 data for 1993-2021 show the localization areas of these vortices, with cyclones forming significantly more than anticyclones. Analysis of the trajectories of these vortices showed that the direction of their propagation is mainly eastern. The intense vortex dynamics in the Scotia Sea is also confirmed by reconstructed altimetric data for 1970-1992.

Coping with crisis: The Peruvian state-owned fishing enterprise Pesca Perú, 1973–1998

This article examines why and how states use the legal and organisational construction of the state-owned enterprise (SOE) to deal with environmental and social crises. In 1973, in response to a drastic collapse in the world’s largest fishery, the Peruvian state nationalised its anchoveta fishing fleet and factories while hastily creating Pesca Perú, an SOE given a monopoly on industrial catch and exploitation of the resource. Pesca Perú struggled with a dual mandate and governments with widely varying ideas of how the Peruvian economy should be organised. In the early 1980s the enterprise lost its production monopoly due as much to environmental factors as to political decisions. It was eventually privatised in the 1990s. While generally regarded as a failed business, Pesca Perú was a useful tool for a state with limited resources to pursue governance and developmental objectives.

A firm-level perspective on windows of opportunity

The concept of windows of opportunity (WoO) has been put forward as a perspective for understanding industrial catching up in developing and emerging economies. A related, but separate literature (capability literature) has focused on the learning processes of developing country firms as they build technological capabilities. In this paper, we examine the insights that can be drawn from the capability literature in order to provide a more nuanced and micro-level perspective on WoO. Through a review of the capability literature, we highlight the intra-industry differences and capability-building trajectories of individual firms as they respond to technological, demand, and institutional WoO. The paper underscores the importance of devoting attention to firm-level differences to understand how these may influence firms' responses to WoO.

Reproductive cycle and sexual maturity size of landed Selene peruviana (Perciformes: Carangidae) on the coasts of the Ecuadorian Pacific

The Peruvian moonfish (Selene peruviana) is an important fisheries resource that is landed in the main fishing harbors of Ecuador. At the local level, little information is available regarding the biology of this species, which hinders the development of management plans. The present study evaluates the reproductive characteristics of S. peruviana such as the size at sexual maturity and reproductive cycle. Specimens were obtained from artisanal and industrial catches from January 2017 to December 2018. The morphometric characteristics, sex, and maturity stage of 886 specimens were determined, and the gonadosomatic index (GSI), hepatosomatic index (HSI), and relative condition factor (Kn) were estimated. The length-weight relationship and length at sexual maturity (L50) were evaluated with an allometry equation and multi-model analyses, respectively. The mean capture size (total length, TL) was 23.62 cm for males and 22.97 cm for females. A sex ratio (M:F) of 0.70:1.00 (χ2 = 26.28, P < 0.05) was obtained. The allometric factor of the length-weight relationship for both sexes (b) was 2.63 (t = 12.16, P < 0.05), and the coefficient of determination (r2) was 0.89, which suggests that negative allometric growth was present. The L50 (TL) was estimated to be 22.61, 23.86, and 23.27 cm for males, females, and sexes combined, respectively. The monthly GSI, HSI, and Kn values were significantly different (K-W, P < 0.05) among study months. The maximum GSI values were observed in February and March, which constituted the period of highest reproductive activity. The HSI and Kn values exhibited similar trends. The size at sexual maturity was similar to the average catch size, which could indicate that S. peruviana is currently at the limit of its optimal catch size.

Роющая деятельность крота обыкновенного в условиях Беларуси и необходимость его отпугивания

The article presents the data of hunting for the mole in the republic in the last century, during the period when the hunting for the mole was carried out, the factors contributing to the increase in the number of the mole population at the present time are indicated: the absence of natural enemies, the adequacy of the food supply throughout the year, the lack of industrial catching. New data on the average size of molehills are given: diameter Dcr = 28 ± 2 cm, height Hcr = 9.7 ± 0.6 cm and their number in the studied areas of the Pruzhany region. Based on the data of counting molehills in Dzerzhinsky, Stolbtsovsky, Uzdensky, Pruzhany and Pinsk districts in areas under natural grasses or sown with cereal crops, an average number of molehills in the Brest region was established, which amounted to 36 molehills (average area 2.2 m2) per plot 10*10 m2, which is about 2 % of the total area. An approximate area was determined, amounting to 21.5 thousand hectares, located under molehills in the Brest region. The influence of the mole on the amount of processed land and the humus formation associated with this, depending on the intensity of catching, is considered; this year, this value amounted to 15.202 million tons of soil. The need to scare away moles, at least from areas of intensive visitation by people and domestic animals (garden plots) was noted due to the high infection of moles with ectoparasites dangerous to humans and animals. Information is provided on a new mole repeller developed in Belarus and mastered for production, based on calcium sulfate dihydrate, which does not contain pesticides and does not lead to the death of animals, but helps to leave the territory treated with this mole repeller.

Trends in Indian Ocean marine fisheries since 1950: synthesis of reconstructed catch and effort data

Context Contrary to other ocean basins, Indian Ocean catches have increased consistently since 1950, although reported data are known to be incomplete. Fish is a crucial food source in the Indian Ocean; however, ineffective management often empowers over-exploitation. Aims We synthesised and reviewed Indian Ocean reconstructed catch and effort data by fishing sector and fishing country at the ocean-basin scale. Methods We aggregated reported and reconstructed unreported catch and effort data for the Indian Ocean and derived catch-per-unit-effort (CPUE) time-series by sector. Key results Indian Ocean rim country catches dominated in the Indian Ocean. Small-scale catches in the Indian Ocean have grown continuously by over 300% from 1.9 × 106 tonnes (Mg) year−1 in 1950 to 6.5 × 106 tonnes year−1 by 2018. By contrast, total industrial catches from the Indian Ocean have reached a plateau at ~8.5 × 106 tonnes year−1 since the late 1990s, after having steadily risen from very low levels in the early 1960s. Unreported catches declined from 45 to 25% of total catches. Total fishing effort, driven by the industrial sector, has increased 30-fold since 1950 from 0.4 × 109 to 11 × 109 kW-days by 2010, whereas CPUE has declined 78%, with steeper declines in the small-scale (>80% since 1950) than in the industrial sector (65% from its 1981 peak). Conclusions The different sectoral patterns in the Indian Ocean compared with other ocean basins are likely to be due to the region’s high dependence on small-scale fisheries and the later onset but swift growth of industrial fishing. The declining CPUE suggests strong decreases in stock biomass caused by strongly increasing fishing effort, especially in the industrial sector. Implications Indian Ocean countries should prioritise lower-impact well-managed domestic small-scale fisheries to maximise long-term, sustainable nutrient supply for local livelihoods.

Efficiency Improvement of the Process of Cleansing from Scale the Carp Carcass Cyprinus carpio with Ultrasonic Processing Use

Topicality. The article presents data and substantiates the feasibility of ultrasonic processing use while cleansing the carcass of commercially caught pond fish from scale on the example of carp. Purpose and methods. The aim of this research is to improve the process of cleansing carp Cyprinus carpio carcass from scale using ultrasonic processing by estimating the practical model that describes the relationship strength scale-skin fish. In the course of the study, analytical, theoretical and experimental methods have been applied, using control and measuring equipment of appropriate accuracy, standard methods for examining food raw materials, modern methods of mathematical statistics, correlation analysis, and computer technologies. Results. Based on the results of experimental data evaluation, the theoretical dependence of the scale-skin bond strength on the mass of pond fish carcass has been confirmed. The conducted experimental studies made it possible to determine the strength of the scale-skin bond for pond fish carcass in the native and chilled states, and to calculate, based on the experimental data, the value of the k3 coefficient for carp. While using this, it becomes possible to calculate the strength of the scale-skin bond for carcass of any weight group in theoretical way. Experimental studies gave an opportunity to fix the change in the strength of the scale-skin bond for carp carcass of industrial catch in conditions of storage in a chilled form. This dimension was found to vary a little, and the scale-skin bond strength in the native state could be used in order to elaborate the specification for the scale removal device. The dynamics of changes in the strength of the scale-skin bond under the influence of ultrasonic processing of fish raw materials was determined. It was revealed that the greatest influence on the change in the scale-skin bond was exposed to ultrasonic vibrations with a frequency of 22 kHz. So, the use of the specified frequency reduced the processing time by 27...34% for carp. This phenomenon can be explained by the fact that the selected frequency (22 kHz) has the highest oscillation amplitude of ultrasonic end of the emitter. Conclusions and discussion. It has been established that the ultrasonic frequency, the mass of fish carcass and the duration of processing have a decisive influence on the efforts of the scale-skin bond. The scale-skin bond ratio for Cyprinus carpio carp carcass in the native state was calculated, the value of which is 2.29. During the experimental studies, it was highlighted that the magnitude of the scale-skin bond coefficient for carp carcass changes insignificantly, and the strength of the scale-skin bond in the native state can be used to elaborate the terms of reference for the apparatus for removing scales. The greatest influence on the change in the scale-skin connection in conditions of ultrasonic processing was recorded at an oscillation frequency of 22 kHz. Prospects for further scientific research are to found the implementation of a complex process for cleansing fish carcass from scale, in particular, removing the fish guts, which can affect the reduction in the energy content and material consumption of the corresponding processes.

Структурні показники популяції плоскирки (Blicca bjoerkna Linnaeus, 1758) Кременчуцького водосховища

Purpose. Analysis of structural indicators of the population of Blicca bjoerkna L. in the Kremenchuk reservoir in the world increasing its importance in the composition of industrial catches and development of methodological approaches to its use to reduce the industrial load on the catch of major industrial species. Methodology. Primary materials were collected at the monitoring sites of the Institute of Fisheries of NAAS, performed in the surface area of the Kremenchuk reservoir during 2016–2021. Findings. The article establishes the general basic population indicators of the population of Blicca bjoerkna L. in the Kremenchuk reservoir. Indicators of natural, commercial and general mortality of the population are established. The originality: the findings of the work serve the sustainable use of aquatic bioresources of natural reservoirs as a basis of scientifically sound principles for sustainable fisheries. Practical Value: the population indicators conducted in the work can be used to calculate the limits of the commercial catch of silver bream in the Kremenchuk reservoir to ensure its sustainable use. Key words: silver bream, Kremenchuk Reservoir, age structure, mortality, commercial stock

How latecomers catch up to build an energy-saving industry: The case of the Chinese electric vehicle industry 1995–2018

This research identifies how windows of opportunity (WOP) emerge and influence the catching up process of the Chinese electric vehicle (EV) industry between 1995 and 2018 by analyzing technological, institutional, and market demand elements of the WOP. Our case study indicates that government policies play a vital role. Along with the development of Chinese EV industry, government policies evolve from initiation to consolidation and finally reposition. Meanwhile, WOP emerge but diverge in their patterns; from institutional to technological and finally to the market demand WOP. Our study further elaborates the interplay of the above-mentioned three kinds of WOP, which provide feedback to the government authorities and work jointly to facilitate the catching up of Chinese EV industry. Based on the evidence of the Chinese EV industry, we continue the discussion of the emergence and interplays of WOP during the industrial catching up in latecomer countries like China, who is eager to build an energy-saving industry. Our case study provides a fine-grained analysis of policy evolution and its role in opening the different kinds of WOP, which eventually contribute to the successful catching up of a latecomer industry. It also offers new insights for policymakers when building a sustainable system.

Fisheries as a factor of strengthening food security in Russia

The study provides a comprehensive assessment of the role of the fishery complex in ensuring food security. The health and life expectancy of the population largely depend on the amount of fish consumed. The main source of fish intake in the diet of Russians is the industrial catch of aquatic organisms. The catch volumes have been relatively stable in recent years. Aquaculture production in Russia is insignificant, but continues to grow. The analysis revealed a low dependence of food supply on imports and a high degree of self-sufficiency in fish products in Russia. Due to the decrease in the purchasing power of the population’s income and price inflation, the physical and economic accessibility of fish and fish products for a significant part of consumers is decreasing. The structure of consumption is dominated by cheap fish products and products with a low processing depth. A tendency towards a decrease in the quality of fish products in the consumer market has been revealed. These factors indirectly threaten the food security of Russia.

IDE, Spillovers Technologiques et Performances Exportatrices des Économies Émergentes et en Développement

Foreign direct investments could be a privileged instrument for the mitigation of the technological gap, the dynamization of technological and industrial catch- up and the consolidation of the technological and scientific content of national industrial production, in addition to the modernization of productive apparatus, the expansion of industrial exports, and the celerity of their technological rise in the economies in a position of industrial takeoff. The internationalization of production favored by the rise of global value chains, as part of the process of international segmentation of production processes, has undeniably propelled the emergence of new industrial specializations and the restructuring of organizational models of production, namely in emerging countries as well as in developing countries, based on a heap of factors of attractiveness and exploitation of factorial and productive advantages, both comparative and competitive. The objective of this paper is to highlight the factors that motivate the choices and scenarios for the redeployment of production sites at the international scale, while measuring the impact of inward FDI on the scope of the export performance of host economies, by exploring the resulting effects on the level of industrial competitiveness, creative, research and development activities and inventive capabilities, total factor productivity, externalities and the absorptive capacity of technology transfer in the local productive system, through the ordinary least squares methodology over an analytical span of nearly three decades and a panel of 10 emerging and developing economies.

Reconstructing historical baseline catches along Highway 101: U.S. West Coast marine fisheries, 1950–2017

The United States of America, as most other countries, emphasizes commercial fisheries when reporting statistics to the Food and Agriculture Organization of the United Nations (FAO), and excludes data from other sectors, such as recreational fisheries. Our study is a first attempt to account comprehensively for all sources of total U.S. marine catches from the Exclusive Economic Zone waters along the West Coast of the continental USA from 1950 to 2017 in one dataset, i.e., excluding the states of Alaska and Hawaii. Total reconstructed catches for 1950–2017 were 1.2 times higher than the data reported by the USA to the FAO. Commercial landings dominated catches, with 65% from large-scale, industrial fisheries and 31% from small-scale, commercial fisheries. Recreational fisheries accounted for 4% of the total catch, after accounting for post-release mortality. Total catches were highest in 1950 at around 750,000 t and declined to 570,000 t by 2017. Internationally unreported discards increased from 24,000 t in 1950 to 86,000 t in 1989, but declined after the introduction of bycatch reduction devices to around 10,000 t year−1 by the mid-2010s. Total catches by taxonomic category suggest a decline in the diversity in catches. Levels of reporting for total catches is excellent for recent decades, with around 95% of total catches accounted for by the mid-2010s, but around 40% of catches were missing from data reported to the FAO between the late 1960s and early 1990s. This discrepancy was largely driven by industrial catches of North Pacific hake (Merluccius productus) that were not in the officially reported data. Our results suggest that recreational fisheries and discards can make up a considerable component of total catches over time. We suggest that the USA include their recreational catch estimates in their annual data submission to the FAO, retroactively to 1950.

Tracking industrial fishing activities in African waters from space

AbstractMarine fisheries in African waters contribute substantially to food security and local economies in African coastal nations. Recently, there are growing concerns about the sustainability of living marine resources in these countries’ exclusive economic zones (EEZs) due to increased risks from climate change, pollution and potential over‐exploitation of fisheries resources by non‐African (foreign) countries. To effectively manage fishing activities and sustain marine resources in African waters, we need useful tools for characterizing the fishing activities in African waters. Here, we assess the utility of the Automatic Identification System (AIS) derived data for describing the spatial characteristics of African and foreign industrial fishing activities within the EEZs of African coastal nations. The results show that the AIS‐derived spatial pattern of industrial fishing activities in African waters is consistent with that of industrial catches derived from the Sea Around Us database. Across African EEZs, the spatial correlations between primary productivity and fishing effort highly vary by gear types, which emphasizes the importance of investigating specific fishing strategies when studying the effects of bottom‐up drivers on fishing effort. We find an EEZ‐specific spatial pattern for fishing efforts across African waters and identify some socioeconomic, political and geographic factors that likely affect the decision of fleets to fish in specific African EEZs. We conclude that AIS‐derived fishing data can be a useful complementary tool for characterizing the spatial pattern of industrial fishing efforts in African waters.

Spawning areas of two shallow-water penaeid shrimps (Penaeus indicus and Metapenaeus monoceros) on the Sofala Bank, Mozambique

Penaeus indicus and Metapenaeus monoceros are commercially important penaeid shrimp species in the Western Indian Ocean, supporting fisheries on the Sofala Bank, Mozambique. Despite their importance, critical gaps exist in knowledge that is relevant for management purposes. In particular, there is poor understanding of the spatial patterns in spawning for the two species. To fill this gap, we used annual data of mature female stages from research surveys conducted in late summer during January/February from 2003 to 2017. Three distinct spawning areas for P. indicus and M. monoceros were identified (northern, central and southern), all adjacent to river mouths. Spawning areas of the two species overlapped in waters shallower than 25 m, but M. monoceros spawning areas also extended to deeper (45 m) waters. Spawning areas of the two species had different spatial extents, with M. monoceros extending to the north and P. indicus to the south. The northern and central spawning areas were more persistent than the southern area. The central spawning area, however, has shifted northward for the two species during the recent period of depleted stock since 2012. We also used daily industrial catch rate data from the fishing season in March–November 2004 to 2017 to investigate annual patterns. High abundance indices of the two species were observed in the northern and central areas of the Licungo River. Catch rates, however, suggest seasonal variability with depth for the two species. This study provides new information on species-specific spawning patterns in space, which should be considered in future management approaches and spatial planning.

Socio-economic development, scientific research, and exploitation explain differences in conservation status of marine and freshwater chondrichthyans among countries

Sharks, skates, rays and chimaeras (chondrichthyans) are of high conservation concern; especially obligate freshwater chondrichthyans, given their restricted ranges, proximity to humans, and threatened habitat. The biological traits that increase chondrichthyan susceptibility to extinction are well known. Less attention has been put on the human determinants of chondrichthyan conservation status. Socio-economic development, scientific research, and exploitation affect natural resource management and conservation. We assessed the relationship between these factors and chondrichthyan conservation. We ran generalized linear models with number of Threatened (THR), Least Concern (LC), and Data Deficient chondrichthyans as dependent variables, and indicators of socio-economic development (governance, human security, human development, and corruption indices), scientific research (number of papers on chondrichthyans), and exploitation (total, industrial, and foreign catch of chondrichthyans), as independent variables. Human density instead of exploitation was a predictor for obligate freshwater chondrichthyans. Socio-economic development (regardless of the index used) and scientific research were associated to desirable conservation status, such as low THR and high LC, for both marine and obligate freshwater species. Exploitation and human density (for obligate freshwater chondrichthyans) were associated to negative conservation status, i.e. high THR and low LC. Current human density projections translated into a 69% decrease in obligate freshwater chondrichthyans LC by 2050. Development produces desirable conservation status for chondrichthyans, but resource overconsumption must be reduced. Scientific research appears to assist sustainable use of chondrichthyan resources, and should be promoted in developing countries. Assessment and conservation of obligate freshwater chondrichthyans, and freshwater biota in general, must be pursued with urgency.

The hidden value of artisanal fisheries in Honduras

AbstractDeclining fisheries catches are a global trend, with management failing to keep pace with growth in fishing effort and technological advances. The economic value of Honduras’ catches was estimated within the industrial and artisanal sectors. Catches were found to be 2.9 times greater than the official statistics between 1950 and 2015. The merging of industrial and artisanal catch data masked the decline in industrial catches and hid the strong growth of artisanal fisheries. In 1996, annual artisanal fisheries landed catches surpassed the industrial fishery sector, and in 2000, the annual net value of artisanal fisheries eclipsed the value of the industrial fisheries. These data highlight the importance of artisanal fisheries in Honduras and challenge the long‐held belief that the industrial sector contributes more to the national economy. The global paucity of fisheries data highlights the need for comprehensive strategies to collect more detailed and accurate fisheries data.

ОЦЕНКА РАЗМЕРНО-ВЕСОВОГО СОСТАВА СКУМБРИИ В РАЙОНЕ ЮГО-ВОСТОЧНОЙ АТЛАНТИКИ

The article is devoted to evaluation of the dimensional composition of mackerel in the South-East part of the Atlantic ocean. The study was carried out in Abidjan on the Ivory coast, specifically, at the Abidjan Autonomous port. The study objective was to establish the relationship between the total length and the weight of mackerel, as well as between the length of the mackerel body without the caudal fin and its weight. Weight of mackerel caught during commercial fishing in autonomous port of Abidjan was within 447.64-794.05 g, mean value being 591.08 g. Maximum length of mackerel made 41.5 cm, minimum is 35.2 cm (general length), mean value was 38.85 cm. Maximal fish length without caudal fin was 37.9 cm, minimal length - 31.7 cm, mean value made 35.13 cm. There has been stated linear dependence between general fish length and its weight. The research results will be used to further investigating the issue of industrial mackerel catches in the southeast Atlantic region.