Reviews in Fish Biology and Fisheries, Journal Year: 2024, Volume and Issue: 34(4), P. 1707 - 1732
Published: Sept. 23, 2024
Language: Английский
Fisheries Research, Journal Year: 2023, Volume and Issue: 262, P. 106650 - 106650
Published: Feb. 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.
Language: Английский
Citations
33
Fish and Fisheries, Journal Year: 2023, Volume and Issue: 24(4), P. 527 - 543
Published: March 8, 2023
Abstract Frequent fishing activities are causing overfishing, destroying the habitat of marine life, and threatening global biodiversity. Understanding dynamics their drivers is crucial for designing implementing effective ocean management. The in open sea reported to be characterized by high spatial variability local waters; however, it still unclear whether random or regulated oceanographic variations. Mesoscale eddies ubiquitous swirling currents that dominate locally biogeochemical processes. Previous case studies presented an ongoing debate regarding how exert impacts on trophic organisms, which imposes limitations understanding based bottom‐top control hypothesis from fish activities. By combining deep learning oceanic eddy atlases satellite monitoring, we showed variations were closely related mesoscale midlatitude ocean, confirming primarily targeting tuna, aggregated (repelled from) anticyclonic (cyclonic) cores. This eddy‐fishing activity relationship was opposite satellite‐observed primary production but corresponded well with temperature oxygen content deeper water. integrating existing evidence, attribute eddy‐related a reasonable warm oxygen‐rich water relieves thermal anoxic constraints diving predation tuna while aggravated cold oxygen‐poor cyclonic eddies.
Language: Английский
Citations
26
Canadian Journal of Fisheries and Aquatic Sciences, Journal Year: 2024, Volume and Issue: 81(8), P. 1135 - 1153
Published: Aug. 1, 2024
Fishers often target multiple species. More diverse harvest portfolios may reduce income risk, increasing resilience to climate-driven changes in species’ spatial distributions and availability. Moreover, different effects can be observed across vessels response the same shocks stressors, as fishers are heterogeneous. Evaluation of climate risk vessel groups within a particular fishery requires consideration heterogeneous impacts on availability species how such impact substitution behavior. Here we analyze historical forage distribution closure Pacific sardine affected landings per three coastal pelagic (CPS): ( Sardinops sagax), market squid Doryteuthis opalescens), northern anchovy Engraulis mordax) targeted by U.S. West Coast CPS fleet from 2000 2020. Using cluster analysis, grouped into segments estimated responses segment port area. Our results show that considering heterogeneity is essential development equitable effective adaptation policies designed mitigate these fisheries.
Language: Английский
Citations
8
Global Environmental Change, Journal Year: 2024, Volume and Issue: 84, P. 102805 - 102805
Published: Jan. 1, 2024
As global change accelerates, natural resource-dependent communities must respond and adapt. Small-scale fisheries, essential for coastal livelihoods food security, are considered among the most vulnerable of these coupled social-ecological systems. While previous studies have examined vulnerability adaptation in fisheries at individual, household, community level, scales organization inconsistent with many legal regulatory frameworks that function practice to mediate behavior, decision-making, adaptation. Here, we use cooperative- privately-owned fishing enterprises Northwest Mexico as a case study examine how different forms marine self-governance experience climate shocks. Leveraging network methods changes participation during recent period pronounced regional oceanographic change, our analysis suggests that: 1) SSF (and strategies harvest portfolios which they associated) help determine impacts response environmental change; 2) there may be important trade-offs between short-term responses prevent or mitigate lost revenue long-term vulnerability. In particular large cooperatives, predicted highly on basis theoretic metrics, exceeded expectations (maintaining increasing resource revenues) while demonstrating degree path dependency increase sensitivity undermine resilience progresses. providing an empirical evaluation arrangements characterized by group sizes, access regimes levels cooperation system perturbation, aim advance common pool theory offering targeted guidance development more nuanced equitable policies.
Language: Английский
Citations
5
Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11
Published: April 8, 2024
This study establishes a three-party evolutionary game model that includes marine ranch firms, consumers, and the government, with focus on digital transformation pattern of ranching. Subsequently, researchers conduct gaming simulation to analyze government subsidy strategy in The following findings are derived: (1) Government subsidies have potential facilitate ranches, benefiting both supply demand sides. positively influence firms involvement consumers this process. (2) from system demonstrate alterations cost–benefit dynamics each participant lead adjustments steady state, thereby prompting adapt its optimal strategy. (3) More not always better. Excessive will destroy stability system, which is conducive realization digitization ranch. (4) Subsidizing more effective driving than subsidizing firms. Subsidies whereas contributes stability.
Language: Английский
Citations
4
One Earth, Journal Year: 2024, Volume and Issue: 7(10), P. 1685 - 1691
Published: Oct. 1, 2024
Language: Английский
Citations
3
Fish and Fisheries, Journal Year: 2023, Volume and Issue: 25(1), P. 60 - 81
Published: Sept. 19, 2023
Abstract The management and conservation of tuna other transboundary marine species have to date been limited by an incomplete understanding the oceanographic, ecological socioeconomic factors mediating fishery overlap interactions, how these vary across expansive, open ocean habitats. Despite advances in fisheries monitoring biologging technology, few attempts made conduct integrated analyses at basin scales relevant pelagic highly migratory they target. Here, we use vessel tracking data, archival tags, observer records, machine learning examine inter‐ intra‐annual variability (2013–2020) five longline fishing fleets with North Pacific albacore ( Thunnus alalunga , Scombridae). Although progressive declines catch biomass observed over past several decades, is one only stocks primarily targeted longlines not currently listed as overfished or experiencing overfishing. We find that varies significantly time space mediated (1) differences habitat preferences between juvenile adult albacore; (2) variation oceanographic features known aggregate biomass; (3) different spatial niches shallow‐set deep‐set gear. These findings may significant implications for stock assessment this systems, particularly reliance on fishery‐dependent data index abundance. Indeed, argue additional consideration overlap, catchability, size selectivity parameters be required ensure development robust, equitable, climate‐resilient harvest control rules.
Language: Английский
Citations
7
iScience, Journal Year: 2024, Volume and Issue: 27(7), P. 110236 - 110236
Published: June 10, 2024
Shipping through the Arctic Ocean is characterized by broad density distributionsThe relative shipping per longitude revealed main routesThe widths of Northeastern and Northwest Passage routes correlated with sea ice area
Language: Английский
Citations
2
Marine Policy, Journal Year: 2024, Volume and Issue: 171, P. 106474 - 106474
Published: Nov. 7, 2024
Language: Английский
Citations
2
Fisheries Oceanography, Journal Year: 2024, Volume and Issue: 33(6)
Published: July 17, 2024
Abstract The abundance of fishery resources significantly impacts the ratio fishing effort to harvest. However, traditional statistics catches or commonly used catch per unit (CPUE) metrics cannot accurately capture complexity resource in ocean. To address this issue, we propose here a novel approach that integrates actual from vessel logs with duration obtained through automatic identification system (AIS) positioning. This combined analysis eliminates confounding factors and introduces metric called “catch efficiency (CE)” evaluate operations more accurately, thereby reflecting reasonable way. In study, focus on CE squid Oyashio Extension region Northwestern Pacific. Our reveals significant temporal spatial variations CE, manifesting both intensity distribution patterns. Moreover, our findings establish close relationship between background water mass distribution, chlorophyll‐a concentration, micronekton biomass. implies can be inferred by considering varying environmental within area.
Language: Английский
Citations
1