Regional Studies in Marine Science最新文献

{"title":"Shallow gas seeps offshore Crimea (Black Sea): Mapping, bubble flow quantification and geochemical study","authors":"T.V. Malakhova ,&nbsp;M.M. Makarov ,&nbsp;A.I. Khurchak ,&nbsp;A.P. Stetsiuk ,&nbsp;K.M. Kucher ,&nbsp;N.S. Syrbu ,&nbsp;A.A. Legkodimov ,&nbsp;M.V. Ivanov ,&nbsp;A.A. Budnikov","doi":"10.1016/j.rsma.2025.104290","DOIUrl":"10.1016/j.rsma.2025.104290","url":null,"abstract":"<div><div>This paper is the first focused study of gas bubble emissions at the Crimean shelf in the northern Black Sea. During R/V Professor Vodianickiy 125/1 Сruise in November 2022 hydroacoustic and geochemical studies were carried out to detect gas seepage along Crimean coastline to assess methane-related processes taking place in the local hydrosphere. More than 200 bubble-induced hydroacoustic anomalies in the water column were found at 7.1 km². We allocated 4 seepage areas which are arranged in the west of the study area and included most of the identified flares located primarily along 35 – 45 m isobaths. Vertical profiles of temperature, salinity, dissolved oxygen content were measured, and a video survey of the seafloor was conducted. The spatial and temporal variability of the flares was examined at Martyan seep site by multiple hydroacoustic surveys on a hours- and days-scales. The observations of the flare appearance showed that most flares are temporally variable. Calculated gas flow rate from individual flare ranged from 4.1 (0.04) to 88.6 (0.101) L·day⁻¹ (t·year⁻¹), while the average value was 38 (0.07) L·day⁻¹ (t·year⁻¹). Distinct methane transport from the seep sites into the hydrosphere was observed only for Martyan seep area by relative enrichments of dissolved methane in near-bottom waters. Sediments from the active seep area were significantly enriched in mercury (87 ± 21 ng g⁻¹) compared to the reference sites (26 ± 7 ng g⁻¹). Our analyses provide one of the first interdisciplinary descriptions of shallow gas seeps sites within the Black Sea seep system.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"89 ","pages":"Article 104290"},"PeriodicalIF":2.1,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harmful algal blooms contribute to the dynamics of salt marsh ponds in a bar‐built estuary","authors":"Ling Ren ,&nbsp;Mihaela Enache ,&nbsp;Douglas Hood ,&nbsp;Thomas M. Grothues","doi":"10.1016/j.rsma.2025.104284","DOIUrl":"10.1016/j.rsma.2025.104284","url":null,"abstract":"<div><div>Salt marsh ponds (SMPs) are a vital component of coastal wetlands, however, studies on microalgae and harmful algal blooms (HABs) in these systems remain limited. To address this gap, we investigated microalgal assemblages and the occurrence of HABs in SMPs on the Sheepshead Meadows Peninsula, New Jersey, across three marsh types: open marsh water managed, ditched, and unaltered. Monthly samples were collected from six SMPs between May 2022 and June 2023. Microalgae composition exhibited dynamic temporal changes in each pond and significant spatial heterogeneity across the ponds. This study is the first to document the widespread presence of HABs in SMPs under different marsh management regimes in this region. Identified HAB taxa included dinoflagellates <em>Akashiwo sanguinea</em>, <em>Amphidinium carterae</em>, <em>Prorocentrum lima</em> and <em>Gymnodinium aureolum</em>, raphidophytes <em>Chattonella subsalsa</em> and <em>Heterosigma akashiwo,</em> haptophyte <em>Prymnesium parvum</em>, and cyanobacteria <em>Planktothrix agardhii</em>, <em>Lyngbya aestuarii</em>. HAB species contributed &gt; 60 % ∼ 98 % of total algal abundance in many cases, with cell densities reaching 10³ to 10⁴ cell/mL for dinoflagellates and up to 10⁵ cells/mL for <em>P. parvum</em>. Environmental variables such as water temperature, salinity, pH, and dissolved oxygen accounted for about 7 % of the algal community variance, suggesting other unmeasured factors influence HAB distribution. Our results indicate that the enclosed and semi-enclosed ponds may create favorable microhabitats for HAB proliferation. Additionally, the frequent undulations of the ponds may facilitate the transport of HAB species, making SMPs potential reservoirs for HABs in New Jersey’s wetlands and coastal waters. This study highlights the need to incorporate SMPs into long-term monitoring efforts to better assess salt marsh habitat conditions and ecological health risks associated with HABs.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"89 ","pages":"Article 104284"},"PeriodicalIF":2.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis water flow direction by biomarkers: A case study at the Yellow River Estuary","authors":"Chao Guo ,&nbsp;Yanfang Li ,&nbsp;Qi Wang ,&nbsp;Qinqin Hao ,&nbsp;Hao Sun ,&nbsp;Cangbai Li ,&nbsp;Xiaomei Zhen ,&nbsp;Yao Huang ,&nbsp;Jianhui Tang ,&nbsp;Tongxu Liu","doi":"10.1016/j.rsma.2025.104274","DOIUrl":"10.1016/j.rsma.2025.104274","url":null,"abstract":"<div><div>The hydrodynamic data in estuary is highly influenced the flow carried substances (pollutant, organic carbon, or inorganic matter) transport fate in estuary, but hard to obtain without professional hydrological monitor equipment. Here, an analysis water flow direction by biomarkers method was applied in Yellow River Estuary. Result shows pelagic bacteria community in Yellow River Estuary samples can be categorized into at least three distinct zones based on cluster analysis. In pelagic community, Flavobacteriaceae, Gammaproteobacteria, Robiginitalea, and Desulfobacterales were biomarkers from Bohai Bay, Laizhou Bay, Yellow River, and Central area of Bohai, respectively. The possible surface water flow direction of each Yellow River Estuary zones could be analyzed based on biomarkers abundance increase or decrease directions. Although without real-time hydrological data validation, utilizing biomarker tracing water flow represents a potential cost-effective and non-instrumental method for monitoring estuary water transmission. This research will greatly help the flow carried substances transport fate analysis in estuary.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"89 ","pages":"Article 104274"},"PeriodicalIF":2.1,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144221534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of cooking methods on the nutritional profile, microelements and Se-Pb risk-benefit of farmed shrimp (Penaeus vannamei)","authors":"Ulaganathan Arisekar ,&nbsp;Rajendran Shalini ,&nbsp;Balasubramanian Sivaraman ,&nbsp;Muruganantham Keerthana ,&nbsp;Kumar Venkatesan ,&nbsp;Manickam Selvaraj ,&nbsp;Bhagyalakshmi Kalidass ,&nbsp;Vijayakumar Renuka","doi":"10.1016/j.rsma.2025.104282","DOIUrl":"10.1016/j.rsma.2025.104282","url":null,"abstract":"<div><div>This research investigated how different cooking techniques such as boiling (BS), frying (FS), grilling (GS), and microwaving (MS) affect the macronutrient profile (including protein, fat, fatty acids, amino acids, calcium, and magnesium), trace elements (such as Cu, Zn, Fe, and Se), and the toxic element (Pb) in shrimp (<em>Penaeus vannamei</em>). The findings indicated a significant increase in protein and fat in cooked shrimp (p &lt; 0.05) due to moisture loss. However, macronutrients such as Ca and Mg were notably reduced during cooking, except for boiled shrimp. Boiling and grilling significantly reduced both essential and non-essential amino acids, such as histidine, serine, and tyrosine, whereas microwaving and frying decreased lysine and methionine levels in cooked shrimp. Regarding fatty acids (FAs), boiling, frying, and microwaving did not notably affect arachidonic acid, EPA, and DHA, although grilling caused slight alterations in their content. Lipid health indices (AI, TI, HI, HPI, NVI, and FLQI) indicate that both raw and cooked shrimp offer health-beneficial FAs and may help reduce cardiovascular diseases. Meanwhile, oxidation indices (OSA and COX) showed that the extracted shrimp fat exhibited good oxidative stability and resistance to auto-oxidation. The study also evaluated the Se:Pb molar ratio, Se-health benefit indices (Se-HBI) (Se-HBV and HBVSe), and benefit-risk value (BRV) owing to the growing link between the protective role of Se and Pb toxicity. The Se:Pb ratio and Se-HBI were &gt; 1, highlighting the protective effect of Se against Pb exposure, whereas positive BRV values suggest that shrimp consumption provides health benefits rather than risks. The relatively higher retention of microelements observed during boiling and microwaving suggests that these methods are more suitable for cooking shrimps. This study demonstrated that Se mitigates Pb exposure by forming a Se-Pb complex, which will be considered in future risk assessments and formulation of seafood safety guidelines.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"89 ","pages":"Article 104282"},"PeriodicalIF":2.1,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144221548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microplastics as sorption materials of herbicides, persistent organic pollutants (POPs) and polycyclic aromatic hydrocarbons (PAHs) in a coastal bay","authors":"A. Huvet ,&nbsp;L. Frère ,&nbsp;C. Lacroix ,&nbsp;E. Rinnert ,&nbsp;C. Lambert ,&nbsp;Paul-Pont I","doi":"10.1016/j.rsma.2025.104279","DOIUrl":"10.1016/j.rsma.2025.104279","url":null,"abstract":"<div><div>Environmental plastic pollution is a major issue due to widespread distribution and persistence across air, land, water. Marine plastic pollution primarily stems from land-based human activities <em>via</em> water runoff, rivers, wastewater discharge, though marine activities also contribute. Coastal and estuarine areas are pollution hotspots for plastic debris and a widespread range of anthropogenic contaminants. The present work assess contamination by organic pollutants in the microplastics collected in a coastal ecosystem, the Bay of Brest, France, in comparison with samples of surrounding surface seawater and sediments. Chemical analysis targeted 21 polycyclic aromatic hydrocarbons (PAHs) including the 16 prioritised by the US Environmental Protection Agency, 14 polychlorinated biphenyl congeners (PCBs) including the 7 monitored by the OSPAR Convention and 25 pesticides. Results showed that PAHs concentrations were highest in sediments near industrial and urban zones. PCBs and pesticides were undetectable in surface water while still present in sediments, indicating historical pollution. Floating microplastics carried only six PAHs, the PCB congener 101, and two pesticides. Namely, the herbicides alachlor, banned years ago, and S-metolachlor were quantified exclusively on floating microplastics, suggesting ongoing contamination from land-based sources due to agricultural soils erosion and runoff in the estuary. These findings raise concerns about the role of microplastics as vectors of pollutants reflecting human activities, in this case agricultural. It highlights the need to improve monitoring and mitigation strategies on plastic wastes and associated contaminants in aquatic and soil environments to reduce the risk for bioaccumulation and toxicity in marine ecosystem.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"89 ","pages":"Article 104279"},"PeriodicalIF":2.1,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Traceability of heavy metal contamination in surface sediments and sourcesink patterns in waters of the Miaodao Archipelago: Combined effects of natural factors and human activities","authors":"Yixiu Wang ,&nbsp;Rijun Hu ,&nbsp;Wenkai Liu ,&nbsp;Xiaodong Zhang ,&nbsp;Jijiang Lin ,&nbsp;Longhai Zhu ,&nbsp;Jingrui Li ,&nbsp;Yongchen Xu","doi":"10.1016/j.rsma.2025.104280","DOIUrl":"10.1016/j.rsma.2025.104280","url":null,"abstract":"<div><div>Archipelagos are unique marine units of ecological and economic value. Clarifying the source and sink patterns of heavy metals in archipelago sediments is crucial for pollution prevention. In this study, eight heavy metals ( As, Cd, Co, Cu, Hg, Ni, Pb and Zn) and their contamination levels were analyzed in 107 surface sediment samples from the marine waters of the Miaodao Archipelago. The sources and effects of the heavy metals were studied by integrating natural and anthropogenic factors, and their source-sink patterns were summarized. All analyzed heavy metals were present at low concentrations, with only light As contamination and a low single-factor ecological risk for Cd. Natural and anthropogenic sources accounted for 82.3 % and 17.7 % respectively. Shipping activities and aquaculture were the main anthropogenic sources of Co, Ni, Cu, Zn and Cd, and industrial and agricultural activities were the main anthropogenic sources of As and Pb. Yellow River pollutants, local aquaculture and shipping activities are the main contributors of metals in the sediments. The barrier effect of the archipelago coupled with natural factors led to the pooling of heavy metals, while human activities further enriched metal concentrations. The complex sedimentary dynamic environment and unique source-sink patterns of the archipelago greatly influence the distribution of metals. There is a need for enhanced monitoring and control of heavy metal contamination, especially As and Cd, in the region.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"89 ","pages":"Article 104280"},"PeriodicalIF":2.1,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144229827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of oxidation-reduction potential on flocculation and mobility of metals in an estuarine environment","authors":"Seyed Mohamadjavad Taghavi,&nbsp;Touraj Nasrabadi,&nbsp;Fatemeh Kachoueiyan,&nbsp;Abdolreza Karbassi","doi":"10.1016/j.rsma.2025.104278","DOIUrl":"10.1016/j.rsma.2025.104278","url":null,"abstract":"<div><div>This study examined the self-purification capacity of the Polrud River estuary and Caspian Sea in removing metals through flocculation at varying oxidation-reduction potential (ORP) levels. Flocculation was investigated under normal and enhanced ORP conditions across salinities of 0.5–2.1 PSU. Zn had the greatest flocculation rate of 51.3 %, while Pb had the lowest rate of 2.5 %. The rise in ORP led to increased Pb, Mn, and Ni flocculation rates by 21.6 %, 11.3 %, and 8.8 %, respectively. Flocculation rate of Zn and Cu decreased by 4.1 % and 2.4 % since salinity controlled their behavior. Moreover, being mostly correlated with ORP and pH, the mobility of metals in sediments followed the order: Mn&gt; Ni&gt; Zn&gt; Pb&gt; Cu. Mobility of studied metals increased with the increase in ORP or the decrease in pH.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"89 ","pages":"Article 104278"},"PeriodicalIF":2.1,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling coastal vulnerability in the Indian Sundarban under possible Shared Socioeconomic Pathways (SSPs)","authors":"Manali Santra ,&nbsp;Chandra Shekhar Dwivedi ,&nbsp;Debashis Mitra","doi":"10.1016/j.rsma.2025.104273","DOIUrl":"10.1016/j.rsma.2025.104273","url":null,"abstract":"<div><div>Considering the dynamic and complex nature of the Indian Sundarbans, coupled with projected sea level rise (SLR), we employed an adapted methodology to identify vulnerable zones along the coastal belts of this delta. The analysis was conducted using InVEST, an open-source model developed by Stanford University. SLR is considered the primary factor in assessing flood-prone areas along the inhabited islands, particularly under cyclone-induced storm surges. A Coastal Exposure Index (CEI) was calculated for two Shared Socioeconomic Pathway (SSP) scenarios, SSP2–4.5 and SSP3–7.0 to account for the projected impact of SLR in the future. Along with SLR, key model inputs included bathymetry, continental shelf characteristics, shoreline geomorphology, wind and wave factors, and the spatial distribution of mangrove habitats. The accuracy assessment yielded a mean absolute error (MAE) of 0.0970 when compared with field measurements, demonstrating strong model reliability. The projected shift in CEI values is concerning; areas classified as low- and moderate-exposure are expected to transition to higher exposure categories by 2050 and 2100 under both SSP scenarios. By 2050, an increasing number of village blocks are projected to experience submergence during extreme precipitation events and storm surges. By 2100, the situation is likely to worsen, with an even greater number of village blocks at risk of submergence, particularly under SSP3–7.0, emphasizing the urgent need for mitigation and adaptation strategies.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"89 ","pages":"Article 104273"},"PeriodicalIF":2.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144229828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stakeholders' perspectives on seagrass ecosystem services and their threats vary across Zanzibar archipelago, Tanzania","authors":"Baraka P. Nyangoko ,&nbsp;Leonard J. Chauka ,&nbsp;Lukas Meysick ,&nbsp;Sven Rohde ,&nbsp;Janine Adams ,&nbsp;Peter J. Schupp","doi":"10.1016/j.rsma.2025.104271","DOIUrl":"10.1016/j.rsma.2025.104271","url":null,"abstract":"<div><div>Recognizing the ecosystem functions and services provided by seagrass meadows and their vulnerability to different environmental and anthropogenic stressors is crucial for effective decision-making, especially in resource-dependent regions. This study explored how stakeholders (local communities) living in proximity to three distinct seagrass meadows in Zanzibar (Chwaka, Jambiani, and Stone Town) perceive and rely on seagrass ecosystem services (SES), their threats and factors influencing on their perception. Data were collected through a combination of methods, including participatory rural appraisal, household questionnaire surveys and field observations. Results revealed that local communities across these sites had mixed perceptions regarding SES. Provisioning services (e.g., fish provision) were the mostly identified SES, followed by regulating services (e.g., coastal protection), supporting services (e.g., fish nursery grounds), and cultural services (e.g., ecotourism). Fish provision, nursery habitats, and coastal protection were ranked as the most important SES for sustaining local well-being. Among all predictors analyzed, proximity to the shore, the main occupation of respondents, and residence time were significant factors that influenced the local communities' awareness of all SES. Unregulated fishing practices, overgrazing by sea urchins, and seaweed farming were perceived as the primary causes of seagrass loss in Chwaka and Jambiani, while in Stone Town, seagrass degradation was attributed to increased wave activity and changing tidal regimes, unregulated tourism (boat anchoring), and pollution. The study concludes that the perceived importance of SES and the drivers impacting seagrass ecosystems vary depending on context-specific factors. This strongly emphasizes the need for conservation actors to increase awareness of the multiple benefits generated by seagrasses, restore degraded areas, and devise solutions tailored to specific threats for sustainable management of seagrass meadows.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"89 ","pages":"Article 104271"},"PeriodicalIF":2.1,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bioeconomic analysis of Egyptian mediterranean and red sea fisheries: Implications for sustainable management","authors":"Marwa Mamdouh-Lotfy ,&nbsp;Mohamed Samy-Kamal ,&nbsp;Jongoh Nam ,&nbsp;Seonghyun Sim","doi":"10.1016/j.rsma.2025.104277","DOIUrl":"10.1016/j.rsma.2025.104277","url":null,"abstract":"<div><div>Egyptian marine fisheries face the same challenges as most of the world’s fisheries including overfishing. This research provides an assessment of the stock and economic situations of marine fisheries in both the Mediterranean and Red Seas of Egypt. Key objectives are to assess the biological status of these fisheries, evaluate suitable surplus production models, and estimate Maximum Sustainable Yield (MSY) with its corresponding effort (E_MSY). Additionally, the study determines economic benchmarks like Maximum Economic Yield (MEY) and Open Access Equilibrium (OAE), and proposes management recommendations based on these bioeconomic analyses. The analysis employs catch and effort data to determine biological parameters using surplus production models. The Clarke-Yoshimoto-Pooley (CY&amp;P) model was selected to estimate MSY and fishing effort in MSY (E_MSY), as it was considered the most suitable for this purpose; a bioeconomic model based on CY&amp;P was also developed. The CY&amp;P model estimations for 2016 show that actual fishing effort in the Mediterranean Sea (498,423 horsepower (HP)) was more than double the target E_MSY (243,768 HP). Similarly, in the Red Sea, effort (296,391 HP) exceeded its E_MSY (175,947 HP), indicating severe overexploitation and stock depletion in both regions. The study underscores the critical need for substantial fishing effort reductions—around 51.1 % in the Mediterranean and 40.6 % in the Red Sea—to reach E_MSY targets. Primary management recommendations derived from this study focus on implementing stringent effort controls, gear-specific measures, and improved fishery monitoring to facilitate stock recovery and optimize economic benefits.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"89 ","pages":"Article 104277"},"PeriodicalIF":2.1,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144221546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}