The assessment of carrying capacity of marine fishery resources in China

Frontiers in Marine Science, Год журнала: 2025, Номер 11

Опубликована: Янв. 8, 2025

Introduction The sustainable development of marine fisheries has been a major concern, with the carrying capacity fishery resources becoming focal point research. Methods This study, utilizing remote sensing data, capture catch and fishing effort data from 2013 to 2020, aims determine maximum yield using surplus production model provide comprehensive assessment status potential China’s resources. Results results indicate that exhibit significant regional variability, East China Sea contributing largest share maintaining sustainability, while regions such as South Sea, Yellow Bohai have exceeded their ecological capacities. Correlation analysis highlights nutrient levels water quality (e.g., chemical oxygen demand) are critical for resource stability, distribution management protected areas further influence capacity. Discussion study contributes more effective policies, aiming balance economic benefits health. By understanding these dynamics, policymakers can better address challenges facing fisheries.

Язык: Английский

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Towards Sustainable Exploitation of European pilchard (Sardina pilchardus) Stocks off West African waters

Environmental and Sustainability Indicators, Год журнала: 2024, Номер 23, С. 100460 - 100460

Опубликована: Авг. 15, 2024

European pilchard (Sardina pilchardus), herein referred to as "sardine" or "European sardine", is the most productive and economically important small pelagic fish in Northwest African waters. Thus far, very little known about its stock status West region despite rapid decadal increase catch production. The present study provides avenues vital improving guidance for sustainable species management. In this region, sardine divided administratively into three stocks (northern: N, central: A + B, southern: C). Thus, used two Surplus Production Models (SPM) evaluate sardine's status. Sardine's scientific survey biomass data obtained from FAO-CECAF's (Fishery Committee Eastern Central Atlantic (CECAF)) latest reports were analysis fit SPMs investigate effectiveness of available catch-per-unit-effort (CPUE) trends setting total allowable (TAC) sustaining different region. Results indicate that north fished at optimum levels. Meanwhile, output based on indices indicated a healthy state central southern stocks. Similarly, fishery CPUE showed similar compared index, indicating Therefore, cases where index unavailable run assessments, suggests CPUEs could be monitor over time may also provide proxies. Additionally, with climate other environmental changes, must regularly monitored consistent comparable methodologies updated fisheries series data.

Язык: Английский

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Predicted effects of marine protected areas on conservation and catches are sensitive to model structure

Theoretical Ecology, Год журнала: 2025, Номер 18(1)

Опубликована: Янв. 2, 2025

Язык: Английский

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Does increased complexity improve performance: Evaluating a constrained biomass dynamics model and an empirical harvest control rule

Fisheries Research, Год журнала: 2025, Номер 284, С. 107317 - 107317

Опубликована: Март 6, 2025

Язык: Английский

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Dwindling deep-water fish stocks in the Azores: The first quantitative assessment

Fisheries Research, Год журнала: 2025, Номер 285, С. 107371 - 107371

Опубликована: Апрель 14, 2025

Язык: Английский

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Towards a comprehensive framework for providing management advice from statistical inference using population dynamics models

Ecological Modelling, Год журнала: 2024, Номер 498, С. 110836 - 110836

Опубликована: Сен. 18, 2024

Язык: Английский

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Stochastic surplus production and length-based assessment models to compare Maximum Sustainable Yield advice for the Moroccan Atlantic chub mackerel

Frontiers in Marine Science, Год журнала: 2024, Номер 11

Опубликована: Сен. 20, 2024

Fisheries management needs to ensure that resources are exploited sustainably and the risk of depletion is at an acceptable level. In developing countries, multi-gear, multispecies fisheries often lack data, making conventional stock assessment approaches unsuitable. Data-limited methods have been developed compare quantitative measures fishery status with biological reference points. Morocco, despite its large productive ecosystems, most fishing stocks remain unassessed. We selected a chub mackerel, considering availability survey fact it occupies important place in small pelagic resources. Although this stock, there new information on migration possible exchange between two mackerel (central southern). This study presents first attempt combined provide Maximum Sustainable Yield ( MSY ) estimates related indicators Moroccan (center south) by using used data-limited approaches, Stochastic Surplus Production model Continuous Time (SPiCT) Length Based Spawning Potential Ratio estimation (LBSPR). These were applied analyze state estimate how far away was from estimated harvest relative all available time series data. The findings valuable advice for while remarking advantages limitations mackerel. SPiCT results show current level closely aligns , biomass B below mortality F exceeds . For LBSPR, SPR values lower than point 40%, which serves as proxy indicating also Both models suggest full overexploited mainly period (2016-2020), different perception one provided only analyzing indices fluctuations indicate critical over longer period. Then, exercise pointing out importance having data sources better estimation.

Язык: Английский

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Vector Autoregressive Spatio-Temporal (VAST) models for biomass distribution of pacific cod Gadus macrocephalus (Gadidae) considering water temperature at the sea bottom in the West Bering Sea zone

Izvestiya TINRO, Год журнала: 2024, Номер 204(3), С. 722 - 744

Опубликована: Окт. 8, 2024

High statistical significance of water temperature at the sea bottom T and depth D for distribution pacific cod in West Bering Sea fishing zone is found several tested models tuned on data trawl surveys conducted period between 1977 2021 not deeper than 400 m. The vector autoregressive spatio-temporal (VAST) which included nonlinear dependencies catches from have best generalization ability. Correlation predicted by VAST observed density test set are higher that simpler trained using full data. produce continuous time series biomass with estimates their uncertainty weights model configurations relative to After stacking previously published biomass, obtained allow estimate dynamics biological processes deviations stationary assumptions approximately volume “extra” considered these Bayesian State-Space Surplus Production Model. portion increased sharply above 40 % 2016 reached maximum 49 2018, then began decrease. Sharp changes main EOF modes revealed years. Thus, hypothesis redistribution due cold pool area was first methods space. Due high errors forecasts based analysis only, there impossible predict accurately without predicting shelf.

Язык: Английский

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Depletion Estimation, Stock–Recruitment Relationships, and Interpretation of Biomass Reference Points

Fishes, Год журнала: 2024, Номер 9(11), С. 447 - 447

Опубликована: Ноя. 1, 2024

Stock depletion level is an important concept in the assessment and management of exploited fish stocks because it often used conjunction with reference points to infer stock status. Both can be highly dependent on stock–recruitment relationship. Here, we show how estimated models, what data inform level, relationship influences level. There are a variety that provide information abundance. In addition, estimate unexploited absolute abundance needs determined. This means extrapolating back time start fishery, accounting for removals productivity. Uncertainty arises model account same by either estimating low productivity (e.g., natural mortality) high carrying capacity or capacity, different relationships between which strongly controlled Therefore, estimates particularly sensitive uncertainty biological processes related mortality growth when length composition used. depletion-based need recruitment variability, autocorrelation, trends, regime shifts. Future research focus mortality, relationship, asymptotic length, shape selectivity curve, strategies robust these parameters. Tagging studies, including close-kin mark-recapture, address some issues. However, will remain uncertain.

Язык: Английский

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Stock assessment good practices: The crescendo of CAPAM’s workshop series and their consequent special issues

Fisheries Research, Год журнала: 2024, Номер unknown, С. 107211 - 107211

Опубликована: Ноя. 1, 2024

Язык: Английский

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