Sustainable Exploitation Research Articles

Phytochemical profiling of wastes from the processing of shea butter (Vitellaria paradoxa) and pharmacological potentials within the paradigm of circular bioeconomy: Emphasizing antioxidant and antidiabetic applications

Shea butter is a natural fat that is extracted from the kernels of the shea butter tree, and it is widely used in food preparation, cosmetics, and therapeutic practices. Shea trees are prevalent across Africa, and the traditional extraction methods produce significant wastes. However, there is dearth of information on the phytochemical profiling of these wastes and their potential biomedical values. Thus, this study conducted a thorough phytochemical investigation of the shea butter wastes from different processing stages, including brown and black shea cakes (SNC1 and SNC2), shea nut shells (SNS), and shea nut wastewater (SNWW). By using gas chromatography-mass spectrometry (GC–MS), the bioactive chemicals in these wastes were identified and quantified. Furthermore, the antioxidant and antidiabetic activities of the wastes were investigated for their potential pharmacological applications. The maximum antioxidant activities obtained at 60 mg/ml revealed DPPH radical scavenging of 62.34 % for SNC1, ferric reducing power of 68.13 % for SNC2, H2O2 radical scavenging of 38.46 % for SNS, and nitric oxide scavenging of 35.13 % for SNWW indicating their potentials in combating oxidative stress. Additionally, the promising anti-diabetic activity, with alpha-amylase inhibition reaching 84.74 % for SNS at 60 mg/ml highlights their potential in diabetes management. This study provides a holistic understanding of shea butter wastes, unraveling their chemical complexity and exploring their pharmacological potentials. It not only expands our knowledge of shea butter wastes, but also unlocks new avenues for utilization of the wastes in various industries, thereby contributing to waste management and sustainable exploitation of shea resources.

Waste-to-resource: Extraction and transformation of aquatic biomaterials for regenerative medicine

The fisheries and aquaculture industry are known for generating substantial waste or by-products, often underutilized, or relegated to low-value purposes. However, this overlooked segment harbors a rich repository of valuable bioactive materials of which have a broad-spectrum of high-value applications. As the blue economy gains momentum and fisheries expand, sustainable exploitation of these aquatic resources is increasingly prioritized. In this review, we present a comprehensive overview of technology-enabled methods for extracting and transforming aquatic waste into valuable biomaterials and their recent advances in regenerative medicine applications, focusing on marine collagen, chitin/chitosan, calcium phosphate and bioactive-peptides. We discuss the inherent bioactive qualities of these “waste-to-resource” aquatic biomaterials and identify opportunities for their use in regenerative medicine to advance healthcare while achieving the Sustainable Development Goals.

Optimal Exploitation Strategies of Sustainable Utilization of Egypt's Fossil Groundwater Reserves

Groundwater-dependent areas in Egypt are being reclaimed as a result of the impending food crisis. Thus, the national project for land reclamation aims to turn vast tracts of desert land into productive agricultural land. Even while this kind of rural development is desperately needed, relying solely on fossil groundwater sources is a dangerous course of action. Therefore, it is crucial to use these groundwater resources quite carefully. Selecting a safe pumping schedule to prevent aquifer depletion and/or seawater intrusion is just one of the goals. However, using groundwater simulation models based on optimal approaches would introduce exploitation plans that, at the same time, guarantee the aquifers' sufficiency for continued development and maximize the agricultural investment. Thus, a groundwater flow model was generated using the FEFLOW software to explore the Moghra aquifer’s potential for extensive rural development. The maximum pumping regime that coincides with the regulation rule that was set by the MWRI for the next 100 years has been concluded. There is a potential for sustainable exploitation of this water resource to irrigate a total area of 85,715 acres (34,687 ha). The resulting drawdown is expected to reach 95.4 m. Furthermore, a few mitigating techniques are suggested as efficient ways to stop or impede the saltwater intrusion, such as the installation of subterranean barriers and brackish water scavenger wells. Without a doubt, the intended findings would serve as the foundation for wise local water management choices that might strike a balance between the socioeconomic welfare of our nation and environmental preservation. The outcomes of the project can be used by decision making and stakeholder to achieve sustainable water resources management in the new lands for reclamation projects in the northwestern of Nile Delta, Egypt.

The Yaya Reserve: From the Evolution of its Plant Cover to Proposals for Sustainable Management

The Yaya reserve, one of the biodiverse forests in Ivory Coast, faces significant threats from agricultural colonization, illegal logging, and demographic pressure, which could jeopardize its sustainability. This paper focuses on contributing to the reserve’s sustainable management. To achieve this, three categories of data were collected: remote sensing data, floristic inventory data, and survey data from the neighboring populations. Remote sensing data were obtained by downloading images from the USGS earth explorer website. Floristic data were obtained through surface and itinerant survey. Survey data were collected using a structured interview. The images were processed to calculate the areas of various land use classes. The floristic data were analyzed for species richness and composition, while the survey data were analyzed to understand local perceptions of landscape dynamics, current management practices, and proposals for participatory management. The results revealed two major periods in the forest’s dynamics: increased deforestation from 1986 to 2005 and subsequent restoration from 2005 to 2022. These phases of degradation and restoration are likely related to recent social and political crises and management challenges. The floristic inventory identified 167 woody species across 134 genera and 47 families. 24 species (14% of the total) are endemic to West Africa, and 21 species (12.42%) are listed on the IUCN red list, indicating a relatively good conservation of the forest. The survey data highlighted the vulnerability of the forest and underscored the importance of centralized decision-making in management. The study suggests that participatory management could be a viable alternative for protecting the reserve. The hypotheses clearly states that the active involvement of local populations in the sustainable exploitation of forest resources can improve living standards, while helping to preserve the forest from exploitative practices.

Reproductive Dynamics of Spot Tail Mantis Shrimp (Squilla mantis): Insights from the Central Mediterranean Sea.

Fisheries management requires improvement in scientific knowledge to ensure sustainable exploitation of important commercial species and population renewal. Within this context, this study focused on the reproductive biology of spot tail mantis shrimp, Squilla mantis, in the Central Mediterranean Sea, aiming to understand the reproductive pattern of this species and validate the macroscopic maturity scale through histological analysis. A multi-year sampling was performed from 2016 to 2020 by a commercial fishing fleet in the Northern Central Adriatic Sea (GSA 17), and a total of 2206 individuals were collected. The monthly average value of the total sex ratio of S. mantis was 0.524 ± 0.044 (mean ± SEM) in favor of females, which dominated the population from September to April. The proposed 5 stage macroscopic maturity scale was validated histologically through histological analysis, confirming synchronous ovarian development. The somatic indexes (GSI and K Fulton) and monthly incidence of macroscopic ovarian maturity stages highlighted a protracted reproductive season from winter to spring (January-May). Although the length-weight relationship showed a similar growth trend between genders, males reached a bigger size in terms of carapace length (C.L.) and dominated the population from 32 mm (C.L.). The macroscopic L50 estimated was 25.94 mm (C.L.).

Assessing the Competitive Advantage of Ecuador’s Shrimp Industry in the Global Market Using the Balassa Index for 2018–2022

Increased shrimp production in Ecuador might significantly boost the nation’s economic development while allowing for the sustainable exploitation of its natural resources. Business owners in Ecuador still require diagnostic tools for investment, marketing, and production planning. Therefore, this study aimed to evaluate the competitive position of Ecuador’s shrimp industry and direct competitors in the global shrimp market. Export data on shrimp from the International Trade Centre and Ecuador’s National Chamber of Aquaculture were used for the top five shrimp-exporting countries. The period 2018–2022 was chosen as the information was available at the start of the research. Balassa’s methodology was employed for the competitiveness analysis, and statistical analysis was conducted to validate the findings. The results show Ecuador has a significant competitive edge compared to its main rivals, Argentina, India, Indonesia, and Vietnam. This analysis indicates that Ecuador has the potential to win bigger market shares in the global shrimp trade despite being placed 70th and 97th, respectively, in the 2017–2018 Global Competitiveness Index and the 2018 Logistics Performance Index. Therefore, it is necessary to establish strategic production plans for Ecuadorian shrimp enterprises to adapt to the global shrimp trade demands and to advance production and supply chain technology so that Ecuador can access additional worldwide markets.

Integrated assessment of offshore wind and wave power resources in mainland Portugal

This study presents a comprehensive analysis of offshore wind and wave energy resources in mainland Portugal, aiming to facilitate sustainable energy exploitation. The study integrates the spatial distribution and temporal variability of those energy resources, as well as the interplay between wind and wave patterns and co-location feasibility. A 44-year dataset (1979–2022), derived from ERA5 reanalysis wind and SWAN wave model across the concession zones designated by the Portuguese government (labelled as P1 to P6) are utilised. The results indicate promising prospects for wind and wave power densities in these zones, emphasising the suitability of the offshore renewable energy extraction. Additionally, analysis revealed fluctuations in wind and wave power variability among the selected locations, with concession zone P3 (Leixões) emerging as a promising candidate due to its relatively lower variability and stable distribution patterns of both resources. The analysis on co-location feasibility demonstrated the potential for efficient energy extraction in location P5 proving to be the most favourable in wind-wave resource integration. Moreover, time lag analysis highlighted opportunities for optimising energy capture efficiency. Overall, this study provides valuable insights into the sustainable exploitation of wind and wave power resources, contributing to deliver informed decision-making for renewable energy investment.

Separation of galena and pyrite via green organic macromolecules at low alkalinity: Flotation response and surface adsorption mechanisms

Pyrite must be separated from galena during the beneficiation stage because it releases toxic gases during pyrometallurgy. However, the separation of the two minerals presents a huge obstacle as they have comparable hydrophobicity. This work offers an environmentally friendly pyrite depressant, pullulan polysaccharide (PP), for concentrating galena. Single mineral flotation showed that the ability of PP to deteriorate floatability was significantly stronger for pyrite than for galena within the pH range of 6.00 − 12.00. PP preadsorption assisted in separating galena from pyrite in a low-alkalinity pulp. The recovery of galena was 71.20 % higher than that of pyrite in the binary mineral flotation system. Characterization results confirmed that the Fe sites of pyrite were more susceptible to forming a stable coordination with the O atoms of PP’s C−O−H group compared to the Pb sites of galena. PP can impede the sodium butyl xanthate (BX) sorption on the pyrite surface, thus effectively depressing the pyrite. By contrast, the sorption of BX onto the galena surface was unaffected by PP, and the galena remained floatable. Thus, PP could be considered as an alternative to conventional inorganic depressants in the galena–pyrite flotation system. This work provides a scientific reference for the green and sustainable exploitation of non-ferrous metal resources.

The Constitutionality of Special Mining Business Permit (IUPK) Application to Community Organisations in Indonesia

The management of natural resources, including minerals and coal, is governed by the principle that these resources are controlled by the state and used as much as possible for the prosperity of the people, the constitutionality of Article 33 Section (3) of the 1945 Constitution of the Republic of Indonesia (1945 Constitution). This principle places the state as the main manager responsible for fair and sustainable exploitation. A Special Mining Business Permit (IUPK) is a license that allows certain parties to manage mining in a certain area, regulated in Law Section 4 of 2009 and its derivative regulations. The decision of Muhammadiyah and Nahdlatul Ulama (NU) to be involved in mining has significant economic, social, and environmental implications. Its economy can increase organizational income, create jobs, and support social programs; its social strengthens the role of the organization in positive change by promoting fair work standards; However, environmental challenges require strict standards to prevent damage. The granting of mining permits is regulated in Government Regulation (PP) No. 25 of 2024, which aims to provide financial independence for religious organizations. However, strict monitoring is needed to mitigate negative impacts such as pollution, social change, and health impacts. From a constitutional perspective, licensing must adhere to the principles of social justice, transparency, and environmental protection to ensure fair and sustainable benefits for society.

Simulation and evaluation of ecosystem service value along the Yellow River in Henan Province, China

The unprecedented growth in population and swift industrial advancements exert considerable strains on the ecosystem, particularly within medium-sized and large urban landscapes. The critical investigation into the intricate links between current and prospective land utilization, as well as the ecosystem service value (ESV), holds considerable empirical relevance for the calibration of land usage frameworks, thereby contributing to the sustainable evolution of extensive urban zones. Utilizing GlobeLand 30 data, the present research probes into the pattern of land transformation and the spatial-temporal dispersal of ESV in Henan’s Yellow River vicinity over a span from 2000 to 2020. For the enhancement of land usage alignment, a Markov-PLUS fusion model was devised to gauge three disparate ESV transition scenarios slated for 2030, namely, natural development scenario (NDS), cropland protection scenario (CPS), and ecological protection scenario (EPS). The principal determinants of land transformation within the 2000–2020 period were recognized as elevation, populace concentration, and atmospheric temperature. Amid the rapid accretion of construction land engulfing substantial cropland and grassland areas, there was an ESV diminution to the tune of 1.432 billion RMB between 2000 and 2020. The ESV’s high-value regions were discerned within relatively undisturbed ecosystem zones, with the lower-value sections identified in cropland and constructed areas, where human interventions exerted pronounced effects on the ecosystem. In accordance with the 2030 land usage simulations and analyses, in contrast to alternative scenarios, the EPS exhibited the least fluctuation in land type alterations in 2030, demonstrated the most pronounced escalation in cold spot concentration, and reached a peak agglomeration level. This underscores that the EPS not only offers a refinement in land utilization configuration but also mediates the equilibrium between economic and ecological considerations. The insights derived from this investigation afford innovative evaluative methods for spatial planning, ecological recompense, and sustainable land exploitation within large- and medium-scale urban domains.

Enhancing Skincare Formulas with Olive Oil-Infused Citrus Peel Extracts: A Comprehensive Study

The increasing global demand for natural and organic ingredients in cosmetics has spurred a surge in research exploring innovative formulations. This study delves into the utilization of citrus fruit peels and seeds macerated in olive oil as a foundation for novel ointments. Through the analysis of extracts from a variety of citrus sources, including orange, lemon, tangerine, grapefruit, and citron peels, as well as lemon and tangerine seeds, their physicochemical properties and antioxidant activity were meticulously examined using thin-layer chromatography (TLC). A groundbreaking aspect of this research is the revelation of the in vitro antioxidant potential of DMSO extracts obtained from these citrus-infused olive oils. Chemical assays unequivocally confirmed the presence of phenols and flavonoids, renowned for their robust antioxidant properties, across all extracts. These significant findings not only reinforce the well-documented benefits of citrus fruits in combating premature aging and diseases but also underscore the untapped potential of citrus by-products as valuable natural cosmetic ingredients. This preliminary investigation serves as a beacon illuminating the promising prospects of integrating citrus fruit remnants into cosmetic formulations. The imperative for further exploration in this realm is evident, aiming to refine formulations and advocate for the sustainable exploitation of citrus resources within the cosmetics sector. By embarking on deeper research endeavors, an inclusive comprehension of leveraging the inherent potency of citrus fruits for the creation of cutting-edge and efficacious natural cosmetic products can be achieved.

Influence of salinity and geographical locations of Mekong river estuaries on the abundance and biomass of rough river shrimp Macrobrachium equidens Dana, 1852 (Crustacea, Palaemonidae)

The Mekong river estuaries play a crucial role as a breeding ground for shrimp and various other valuable aquatic species. However, the scientific understanding of shrimp assemblages in this area remains limited. Therefore, the objective of this research is to investigate the density and biomass of the rough river shrimp Macrobrachium equidens, a highly valuable shrimp species in terms of nutrition and economy, in three Mekong river estuaries: Co Chien, Ham Luong, and Cua Dai. Additionally, environmental parameters were measured to assess their interactions with shrimp distributions. The results indicated that Cua Dai had the highest total density and biomass, followed by Ham Luong and Co Chien. However, the density and biomass of the rough river shrimp did not show significant variations among the estuaries but rather differed based on the salinity gradient. Salinity emerged as the primary factor influencing shrimp distribution. This study provides fundamental ecological data on the rough river shrimp, contributing to conservation efforts and sustainable exploitation in the future.

Proximate Compositions and Fatty Acid Profiles of Raw and Processed Holothuria polii and Holothuria tubulosa from the Aegean Sea

Sea cucumbers have become a highly valuable fishery product, and therefore the determination of their proximate compositions and fatty acid profiles are useful indicators of their physiological status and nutritional value. Thus, various raw and processed products, such as raw, dried, frozen, boiled, and salted Holothuria polii and Holothuria tubulosa that were collected from the Aegean Sea were analyzed. Although there were some notable differences in the proximate and fatty acid profiles between the two species and among the various processing forms, both H. polii and H. tubulosa had a high nutritional value. They were rich in proteins (up to 68.5% in the dried form), and although their lipid fraction was low (0.3–3.9%), it was characterized by very high levels of arachidonic acid (19.1–30.9% of total fatty acids) and eicosapentaenoic acid (8.5–15.7) that play vital roles in human growth, development, and health. In addition, their n-3/n-6 fatty acid ratios were within the recommended ranges, while their low Atherogenic and Thrombogenic indices and high Hypocholesterolemic index denote their high protective role against coronary artery disease. The provided information sheds light on the high nutritional value of this important marine fishery resource and provides valuable information for its preservation and processing. This information could also help policy makers, stakeholders, and the public to recognize the importance of this valuable fishery resource for human nutrition and to adopt preventative measures toward its sustainable exploitation.

Modeling natural resources exploitation in low-information environments

The sustainable exploitation of natural resources constitutes a real-world problem of interest for many fields. In this work, we study those situations in which the exploiting agents have information about the state of the resource and their own benefits and costs but not about the behavior or performance of the rest of the agents. Cognitive Hierarchy Theory provides a framework for those low-information scenarios by focusing on the assumptions that agents make about other individuals’ behavior. Motivated by this theory, we introduce a theoretical agent-based model in which agents exhibit varying degrees of rationalization when exploiting the resource, and this resource’s evolution is driven by a differential equation that mirrors the dynamics of real-world resource growth. Our results show that, although most regimes imply depletion, higher benefits and sustainability are obtained when agents assume overexploitation by the rest and try to compensate for it. Furthermore, many exploiting agents and a long-term perspective also involve a better resource state, reaching the optimal exploitation level when all these factors come together.

Vulnerability of Eastern Tropical Pacific chondrichthyan fish to climate change.

Climate change is an environmental emergency threatening species and ecosystems globally. Oceans have absorbed about 90% of anthropogenic heat and 20%-30% of the carbon emissions, resulting in ocean warming, acidification, deoxygenation, changes in ocean stratification and nutrient availability, and more severe extreme events. Given predictions of further changes, there is a critical need to understand how marine species will be affected. Here, we used an integrated risk assessment framework to evaluate the vulnerability of 132 chondrichthyans in the Eastern Tropical Pacific (ETP) to the impacts of climate change. Taking a precautionary view, we found that almost a quarter (23%) of the ETP chondrichthyan species evaluated were highly vulnerable to climate change, and much of the rest (76%) were moderately vulnerable. Most of the highly vulnerable species are batoids (77%), and a large proportion (90%) are coastal or pelagic species that use coastal habitats as nurseries. Six species of batoids were highly vulnerable in all three components of the assessment (exposure, sensitivity and adaptive capacity). This assessment indicates that coastal species, particularly those relying on inshore nursery areas are the most vulnerable to climate change. Ocean warming, in combination with acidification and potential deoxygenation, will likely have widespread effects on ETP chondrichthyan species, but coastal species may also contend with changes in freshwater inputs, salinity, and sea level rise. This climate-related vulnerability is compounded by other anthropogenic factors, such as overfishing and habitat degradation already occurring in the region. Mitigating the impacts of climate change on ETP chondrichthyans involves a range of approaches that include addressing habitat degradation, sustainability of exploitation, and species-specific actions may be required for species at higher risk. The assessment also highlighted the need to further understand climate change's impacts on key ETP habitats and processes and identified knowledge gaps on ETP chondrichthyan species.

Deep-sea mining rock-fragment dispersal scenarios associated with submesoscale forcings: A case study in the Atlantic

In the last few years, the exploitation of deep-sea regions for minerals extraction raised international attention as an economically viable source for the mining industry. However, most of these minerals are found close to sensitive ecosystems that can be harmed by mining activities. Given the potential impact, there is a need for the establishment of best practices towards the adoption of preventive strategies for the sustainable management and exploitation of deep-sea environments. To accomplish this objective, numerical models have proven to be reliable tools to support decision-making. In the present study, a high-resolution eddy-resolving ocean numerical model was configured and integrated with a semi-Lagrangian model aiming to map the transport of rock-fragments associated with mining activities. The model was applied to an area rich in polymetallic sulphides at the Northern Mid-Atlantic Ridge (NMAR). Model results showed that local topography and circulation dynamics played an important role for the dispersion and settling of the rock-fragments. In the presence of local submesoscale processes, the residence time do not follow the neutral relation H/vs. It was demonstrated that, depending on the local hydrodynamics, rock-fragments released at sub-surface depth can impact wider areas, with a predicted impact on pelagic and benthic organisms.

Evaluation of the Geotourism Potential of the Mountain Lakes in the Călimani Massif: Colibița Lake, Iezer Lake and Zânelor Lake

Evaluation of the Geotourism Potential of the Mountain Lakes in the Călimani Massif: Colibița Lake, Iezer Lake and Zânelor Lake. This paper evaluates the key geosites in the Călimani National Park: Colibița Lake, Iezer Lake and Zânelor Lake. The internationally recognized methodology used in this study has a crucial role in the development of tourism and the conservation of natural resources. The obtained results show that these geosites have a significant potential for tourism development. Colibița Lake, an artificial lake, attracts tourists with its picturesque landscape and recreational activities. Iezer Lake impresses with its natural beauty and ecological importance, being a crucial habitat for local flora and fauna. Zânelor Lake offers a unique cultural experience, thanks to the charming landscape and local legends. The evaluation and management of these geosites will contribute to the management and conservation of natural resources in the Călimani Massif. The development of sustainable tourism requires appropriate management strategies that ensure responsible use and conservation of the environment. Promoting sustainable tourism and respecting conservation principles will ensure the preservation and sustainable exploitation of these geosites, benefiting both local communities and visitors. Keywords: Geotourism, Geosite, Călimani Massif, Carpathian Mountains, Romania.

Immunomodulatory Compounds from the Sea: From the Origins to a Modern Marine Pharmacopoeia.

From sea shores to the abysses of the deep ocean, marine ecosystems have provided humanity with valuable medicinal resources. The use of marine organisms is discussed in ancient pharmacopoeias of different times and geographic regions and is still deeply rooted in traditional medicine. Thanks to present-day, large-scale bioprospecting and rigorous screening for bioactive metabolites, the ocean is coming back as an untapped resource of natural compounds with therapeutic potential. This renewed interest in marine drugs is propelled by a burgeoning research field investigating the molecular mechanisms by which newly identified compounds intervene in the pathophysiology of human diseases. Of great clinical relevance are molecules endowed with anti-inflammatory and immunomodulatory properties with emerging applications in the management of chronic inflammatory disorders, autoimmune diseases, and cancer. Here, we review the historical development of marine pharmacology in the Eastern and Western worlds and describe the status of marine drug discovery. Finally, we discuss the importance of conducting sustainable exploitation of marine resources through biotechnology.

A Review of Subsidence Monitoring Techniques in Offshore Environments.

In view of the ever-increasing global energy demands and the imperative for sustainability in extraction methods, this article surveys subsidence monitoring systems applied to oil and gas fields located in offshore areas. Subsidence is an issue that can harm infrastructure, whether onshore or especially offshore, so it must be carefully monitored to ensure safety and prevent potential environmental damage. A comprehensive review of major monitoring technologies used offshore is still lacking; here, we address this gap by evaluating several techniques, including InSAR, GNSSs, hydrostatic leveling, and fiber optic cables, among others. Their accuracy, applicability, and limitations within offshore operations have also been assessed. Based on an extensive literature review of more than 60 published papers and technical reports, we have found that no single method works best for all settings; instead, a combination of different monitoring approaches is more likely to provide a reliable subsidence assessment. We also present selected case histories to document the results achieved using integrated monitoring studies. With the emerging offshore energy industry, combining GNSSs, InSAR, and other subsidence monitoring technologies offers a pathway to achieving precision in the assessment of offshore infrastructural stability, thus underpinning the sustainability and safety of offshore oil and gas operations. Reliable and comprehensive subsidence monitoring systems are essential for safety, to protect the environment, and ensure the sustainable exploitation of hydrocarbon resources.

The state of spawning grounds, a study of the biology and population dynamics of pacific salmon on Kunashir Island (Southern Kuril Islands) in 2023

The purpose: formation of scientific foundations for improving the efficiency of salmon management on Kunashir Island (South Kuril zone) to ensure the sustainable exploitation of the commercial stock of Pacific salmon, maintain the necessary level of their reproduction, preserve the habitat, as well as improve scientific approaches to forecasting commercial catches.Methods used: the work was carried out in accordance with the methods generally accepted in fisheries research.Result: information was obtained on the dynamics of Pacific salmon entry, the filling of spawning grounds and the state of reservoirs on Kunashir Island. The collection of materials characterizing the biological indicators of chum salmon producers was carried out. Statistical information was obtained on catches of chum salmon and artificial reproduction of salmon fish on Kunashir Island.Practical significance: information on the filling of the spawning grounds of Pacific salmon on Kunashir Island and the quality indicators of their producers will be used to substantiate fishing regulation measures. Data on the state of artificial and natural reproduction of Pacific salmon are intended to develop a strategy for the development of artificial reproduction on Kunashir Island.