Best practices for defining spatial boundaries and spatial structure in stock assessment

Fisheries Research, Год журнала: 2023, Номер 262, С. 106650 - 106650

Опубликована: Фев. 11, 2023

The 'stock concept' in fisheries science conforms to theoretical assumptions of stock assessment models, including negligible movement across boundaries, relatively homogeneous vital rates, and extensive mixing within areas. Best practices for representing population structure involve 1) interdisciplinary identification delineate spatially discrete populations or more complex structure; 2) boundaries that are aligned with the most plausible 3) spatially-explicit sampling, fleet spatial models account heterogeneity, fishing patterns, areas; 4) routine composition sampling analysis overlapping populations; 5) simulation testing performance assessments mis-specified uncertain structure. Practical units do not accurately represent may provide sufficient information achieve fishery management objectives, so practical constraints should be addressed through iterative advances identification, delineation stocks meet unit-stock assumptions, modeling.

Язык: Английский

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Spatial awareness: Good practices and pragmatic recommendations for developing spatially structured stock assessments

Fisheries Research, Год журнала: 2023, Номер 264, С. 106703 - 106703

Опубликована: Апрель 7, 2023

Язык: Английский

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Interconnected partnerships: Mapping collaborations in Australian fisheries stock assessment

Fisheries Research, Год журнала: 2025, Номер 282, С. 107281 - 107281

Опубликована: Янв. 24, 2025

Язык: Английский

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‘Drivin' with your eyes closed’: Results from an international, blinded simulation experiment to evaluate spatial stock assessments

Fish and Fisheries, Год журнала: 2024, Номер 25(3), С. 471 - 490

Опубликована: Март 1, 2024

Abstract Spatial models enable understanding potential redistribution of marine resources associated with ecosystem drivers and climate change. Stock assessment platforms can incorporate spatial processes, but have not been widely implemented or simulation tested. To address this research gap, an international experiment was organized. The study design blinded to replicate uncertainty similar a real‐world stock process, data‐conditioned, high‐resolution operating model (OM) used emulate the dynamics data for Indian Ocean yellowfin tuna ( Thunnus albacares ). Six analyst groups developed both single‐region using platform their choice, then applied each simulated data. Results indicated that across all structures platforms, assessments were able adequately recreate population trends from OM. Additionally, estimate regional generally reflected true OM, particularly regions higher biomass fishing pressure. However, consistent scaling pattern emerged, where estimated scale than within given platform. Balancing parsimony complexity trade‐offs difficult, adequate in parametrizations (e.g., allowing time‐ age‐variation movement appropriate tag mixing periods) critical performance. We recommend expanded use OMs studies, ability portray realistic performance models. Moreover, increased support experiments is warranted facilitate dissemination methodology organizations.

Язык: Английский

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Synthesizing the spatial functionality of contemporary stock assessment software to identify future needs for next generation assessment platforms

Fisheries Research, Год журнала: 2024, Номер 275, С. 107008 - 107008

Опубликована: Апрель 16, 2024

Язык: Английский

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YOLOv7-DCN-SORT: An algorithm for detecting and counting targets on Acetes fishing vessel operation

Fisheries Research, Год журнала: 2024, Номер 274, С. 106983 - 106983

Опубликована: Март 11, 2024

Язык: Английский

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The MSC approach for developing harvest strategies and harvest control rules for Regional Fisheries Management Organisations (RFMOs)

Marine Policy, Год журнала: 2024, Номер 161, С. 106004 - 106004

Опубликована: Янв. 16, 2024

Well-designed and robust harvest strategies are a key governance tool to achieve long term sustainability of target stocks. In some fisheries, however, such as those governed by Regional Fisheries Management Organisations (RFMOs), the development adoption can be challenging. Seafood eco-labelling programs, Marine Stewardship Council (MSC), one way incentivising fisheries advocate for control rules (HCRs). Here we illustrate process through which MSC Standard was recently revised guide implementation tested using management strategy evaluation, with particular focus on RFMOs. We identify three case studies that highlight challenge HCR adoption: Indian Ocean skipjack tuna Western Central Pacific North-East Atlantic mackerel fisheries. discuss problem statement highlighted challenges present when applying previous stocks managed RFMOs, how requirements within aim overcome challenges. These provide an operational framework RFMO-managed implement 'state-of-the-art' evaluation. When applied certified new expected contribute delivering positive change respect implementing HCRs across particularly in cases where there is strong interest market benefits certification.

Язык: Английский

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Developing a collaborative Dungeness crab larval monitoring network in the Salish Sea to provide long-term, fishery-relevant data

Fisheries, Год журнала: 2025, Номер unknown

Опубликована: Янв. 22, 2025

Abstract Many natural resources are managed without essential, biologically relevant data. Fisheries particularly susceptible to this reality and, thus, vulnerable environmental changes and disturbances, with both human livelihoods the health of ecological systems at stake. Here, we explore how Pacific Northwest Crab Research Group (PCRG) employs a collaborative, stakeholder-driven approach generate information needed inform data-poor, co-managed fishery, using example Dungeness crab Metacarcinus magister in northeastern Pacific’s Salish Sea. We focus on PCRG larval monitoring network as multifaceted case study, which unites tribal, state, federal governments, nongovernmental organizations, academic institutions, local communities working produce first standardized continuous data set dynamics region. Highlighting types biological collected, including spatial temporal patterns flux size, application novel fisheries management, well network’s contribution diversity educational opportunities ability leverage new research projects collaborations. The success PCRG’s ultimately highlights effectiveness cooperative, network-based addressing management challenges offers viable model for managing data-poor worldwide.

Язык: Английский

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Current Affairs: Examining the Use of Environmental DNA for Relative Abundance Monitoring in a Dynamic Tidal Habitat

Environmental DNA, Год журнала: 2025, Номер 7(3)

Опубликована: Май 1, 2025

ABSTRACT Assessing the abundance and spatiotemporal distribution of fish species is crucial for informing sustainable fishing practices developing effective conservation management plans. Recently, environmental DNA (eDNA) has emerged as a promising tool estimating not only marine richness but also abundance, with several studies demonstrating positive correlation between eDNA concentration abundance. Consequently, surveys enhance monitoring requiring attention may serve method to quantify relative critical indicator ecosystem health. This study investigates feasibility using metabarcoding estimate in tidal environment, Sussex Bay, UK, case study. We compared indices, estimated by method, two different primer pairs found strong correlations results from each primer. Additionally, we evaluated relationship estimates derived index those obtained Baited Remote Underwater Video (BRUV) counts. Out 14 species, one significant was BRUV The detected fewer overall eDNA, leading higher number zero counts which explain lack statistically relationships. indicates that do strongly correlate dynamic environments, highlighting differences these survey methods. can be at least 2–8 km its assumed source an average minimum travel speed 1.8 km/h. Our findings illustrate effectiveness nondestructive biomonitoring while limitations well challenges comparing abundances methods environments.

Язык: Английский

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Global synthesis of effects and feedbacks from artificial reefs on socioecological systems in recreational fisheries

Fish and Fisheries, Год журнала: 2023, Номер 25(2), С. 303 - 319

Опубликована: Дек. 22, 2023

Abstract Artificial reefs have been widely deployed with the intention of increasing fish habitat, enhancing recreational fishery opportunities and providing socio‐economic benefits to surrounding communities. Substantial work has done understand ecology artificial but efficacy as a management tool hinges on socioecological feedbacks that are not well understood. Socioecological difficult discern because they depend multiple complex interactions between fish, fishers, managers habitats. To better net effects fisheries, we conducted literature review catalogue reefs. Our global synthesis revealed may result in negative effect populations, at least short‐term, catch‐driven bolstering objectives occur more often or greater intensities than positive biological effects. We highlighted important need be accounted for when considering their deployment management. There unintended consequences if from habitat‐to‐fish fish‐to‐fish outweighed by population losses due fish‐to‐fisher feedbacks. Taken concert semi‐permanent nature apparent popularity stakeholders, view emerges possibly functioning ‘social‐ecological trap’. This emphasizes robust assessments reefs, formal decision science approaches implementing these structures.

Язык: Английский

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