Good practices for surplus production models

Fisheries Research, Год журнала: 2024, Номер 275, С. 107010 - 107010

Опубликована: Апрель 6, 2024

Surplus production models (SPMs) have a long history in fisheries ecology and are important for the assessment management of marine species stocks. However, implementation, application, usage these vary across regions case studies. Good practice guidelines can streamline modelling workflows, inform acceptance or rejection an assessment, facilitate derivation advice from accepted assessments. This paper discusses current practices application SPMs proposes good their use stock assessment. We complement our recommendations with results simulation study examining performance age-based operating model SPM under 60 scenarios various assumptions regarding data quantity, quality, priors. provide specific two widely used state-space SPMs: SPiCT JABBA. Finally, we discuss limitations suggest avenues future developments SPMs.

Язык: Английский

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Lessons to be learned by comparing integrated fisheries stock assessment models (SAMs) with integrated population models (IPMs)

Fisheries Research, Год журнала: 2024, Номер 272, С. 106925 - 106925

Опубликована: Янв. 5, 2024

Integrated fisheries stock assessment models (SAMs) and integrated population (IPMs) are used in biological ecological systems to estimate abundance demographic rates. The approaches fundamentally very similar, but historically have been considered as separate endeavors, resulting a loss of shared vision, practice progress. We review the two identify similarities differences, with view identifying key lessons that would benefit more generally overarching topic ecology. present case study for each SAM (snapper from west coast New Zealand) IPM (woodchat shrikes Germany) highlight differences similarities. between SAMs IPMs appear be objectives parameter estimates required meet these objectives, size spatial scale populations, differing availability various types data. In addition, up now, typical applied aquatic habitats, while most stem terrestrial habitats. aim assess level sustainable exploitation fish so absolute or biomass must estimated, although some only relative trends. Relative is often sufficient understand dynamics inform conservation actions, which main objective IPMs. small populations concern, where uncertainty can important, conveniently implemented using Bayesian approaches. typically at moderate scales (1 104 km2), possibility collecting detailed longitudinal individual data, whereas large, economically valuable stocks large (104 106 km2) limited There sense data- (or information-) hungry than an because its goal abundance, data rates difficult obtain (often marine) applied. therefore require 'tuning' assumptions IPMs, 'data speak themselves', consequently techniques such weighting model evaluation nuanced being fit disaggregated quantify variation allow richer inference on processes. attempts example by unconditional capture-recapture

Язык: Английский

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Digital transformation of Egyptian marine fisheries: A pathway to sustainable fisheries management

Marine Policy, Год журнала: 2025, Номер 179, С. 106766 - 106766

Опубликована: Май 15, 2025

Язык: Английский

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Coupling state‐of‐the‐art modelling tools for better informed Red List assessments of marine fishes

Journal of Applied Ecology, Год журнала: 2024, Номер 61(4), С. 647 - 657

Опубликована: Фев. 14, 2024

Abstract In the face of biodiversity loss worldwide, it is paramount to quantify species' extinction risk guide conservation efforts. The International Union for Conservation Nature (IUCN)'s Red List considered global standard evaluating risks. IUCN criteria also inform national assessments. Bayesian models, including state‐of‐the‐art JARA (‘Just Another Assessment’) tool, deliver probabilistic statements about species falling into categories, thereby enabling characterisation and communication uncertainty in We coupled VAST (‘Vector Autoregressive Spatio‐Temporal’) modelling tool JARA, better informed assessments marine fishes. this framework, fitted scientific survey catch rate data provide indices whose propagated outcomes suggesting categories (under population reduction criterion). addition, delivers a valuable habitat assessment understand what may be driving study region. Here, we demonstrate VAST‐JARA framework by applying five contrasting North Sea species, with or without quantitative stock different statuses according latest application previous studies suggest that, among three elasmobranchs, starry ray most need urgent research (and actions where appropriate), followed spurdog, while lesser‐spotted dogfish increasing biomass. Moreover, both indicate European plaice not concern, cod has likely met being listed as Endangered recently. Synthesis applications . predictions output assessment, constitute supporting information make interpretations based on guidelines, which will help decision‐makers their next assessment. foresee assist numerous fishes worldwide. Our many potential advantageous uses, informing resource management climate change impacts

Язык: Английский

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Evaluating the impacts of reduced longline fishing effort on the standardization of longline catch-per-unit-effort for bigeye tuna in the eastern Pacific Ocean

Fisheries Research, Год журнала: 2024, Номер 278, С. 107111 - 107111

Опубликована: Июль 18, 2024

Язык: Английский

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Predicting unseen chub mackerel densities through spatiotemporal machine learning: Indications of potential hyperdepletion in catch-per-unit-effort due to fishing ground contraction

Ecological Informatics, Год журнала: 2024, Номер 85, С. 102944 - 102944

Опубликована: Дек. 9, 2024

Язык: Английский

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Standardization of commercial catch data from multiple gears in mixed fisheries accounting for preferential sampling, catchability, and fishing effort

Fisheries Research, Год журнала: 2025, Номер 284, С. 107305 - 107305

Опубликована: Фев. 24, 2025

Язык: Английский

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Trends and drivers of French tropical tuna purse-seine vessel behavior in the Atlantic and Indian Oceans, 2004–2020

Fisheries Research, Год журнала: 2025, Номер 285, С. 107330 - 107330

Опубликована: Март 17, 2025

Язык: Английский

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Optimizing per vessel hour capture efficiency for rare, heterogeneously distributed fishes: Invasive grass carp Ctenopharyngodon idella in the Sandusky River

Fisheries Research, Год журнала: 2025, Номер 285, С. 107344 - 107344

Опубликована: Март 23, 2025

Язык: Английский

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Limited Demographic Effects One Decade After Implementation of a Harvest‐Slot Length Limit for Walleye (Sander vitreus) in the St. Lawrence River, Québec, Canada

Fisheries Management and Ecology, Год журнала: 2025, Номер unknown

Опубликована: Март 23, 2025

ABSTRACT Although the role of recreational harvest on size structure declining fish populations is often unclear, bag and limits are implemented to prevent overharvest. Long‐term monitoring periodic assessments stock status then become necessary evaluate their potential impacts. Based a long‐term gillnet program in St. Lawrence River, Québec, Canada, effects 381–545 mm harvest‐slot length limit 2011 were evaluated walleye ( Sander vitreus ). Mixed‐effects models revealed continued declines abundance large walleyes, distribution, total annual mortality, female growth, condition, size‐at‐maturity. Expected impacts mostly not achieved, potentially because environmental trophic interaction changes addition increasing fishing pressure. Our results highlight need reassess current fisheries management strategies.

Язык: Английский

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