Downscaling global reference points to assess the sustainability of local fisheries

Conservation Biology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

Abstract Multispecies coral reef fisheries are typically managed by local communities who often lack research and monitoring capacity, which prevents estimation of well‐defined sustainable reference points to perform locally relevant fishery assessments. Recent modeling globally has estimated multispecies (i.e., the maximum fish yields that can be harvested sustainably corresponding standing biomass at those expected achieved) based on environmental indicators. These global a promising tool for assessing data‐poor but need downscaled resource practitioners. Using small‐scale in Papua New Guinea, we assessed sustainability integrating global‐scale analyses with local‐scale conditions cover, sea surface temperature, ocean productivity, whether is an atoll), area, catch estimates, fishers’ perceptions. Local‐scale data were obtained from combination remote sensing products, underwater visual censuses, surveys, household structured social surveys. Our assessment was consistent Specifically, our results suggested fishing community overfishing their stocks below levels maximize production, making overall unsustainable. fisher perceptions declining abundance mean length fishers had spend more time finding fish. site‐level revealed severe exploitation, dynamics masked national‐scale assessments, emphasizing importance matching assessments scale management. Overall, show how applied when long‐term not available, providing baseline managing previously unassessed around globe.

Язык: Английский

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Local knowledge corroborates threats of local extinctions in Kenya’s exploited reef fishes

Marine Policy, Год журнала: 2025, Номер 177, С. 106650 - 106650

Опубликована: Март 7, 2025

Язык: Английский

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Weaving scientific and local knowledge on climate change impacts in coastal Kenya, Western Indian Ocean

Environmental Science & Policy, Год журнала: 2024, Номер 160, С. 103846 - 103846

Опубликована: Июль 24, 2024

Climate change poses severe threats to coastal social-ecological systems (SES) worldwide. Recent calls recognize the importance of including Indigenous and local knowledge (ILK) in research on climate impacts. Yet studies that have attempted weave ILK scientific seldom considered gendered nature Building literature gender pluralism, this study contributes addressing gap by exploring impacts its relation through a approach focusing Western Indian Ocean region, more specifically Kenya. We adopted mixed methodology combining qualitative quantitative approaches. found evidence pronounced SES both reports. Our findings highlight there is an extensive overlap between information derived from systems. Importantly, our revealed reports were only provided SSF communities, namely changes dynamics, decrease rainfall, abundance green algae. Although we variations reported differences not detected reviewed literature. Overall, results suggest cross-fertilization generates holistic, relational, place-based view impacts, which may support sound gender-inclusive adaptive policies. conclude suggesting key policy recommendations for adaptation risk management

Язык: Английский

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Challenges to managing fisheries with high inter-community variability on the Kenya-Tanzania border

Current Research in Environmental Sustainability, Год журнала: 2024, Номер 7, С. 100244 - 100244

Опубликована: Янв. 1, 2024

Reconciling variable between-community and neighboring country goals is the focus of United Nations partnership (Sustainable Development Goal 17) because challenges managing shared common-pool resources, such as fisheries. Our objective was to better understand suggest management that accounts for this variability among fishing villages along Kenya-Tanzania national boundary. We asked stakeholders scale their dependency on fish, knowledge fisheries, governance effectiveness, preferences, future fisheries provisioning scenarios economically aligned with international trade or park conservation. found high fish (90% daily consumption), modest about status (62% correct answers) but a broad agreement need community engagement (>90% agreement). The perceived weakest principles were monitoring resolution conflicts neighbors. Considerable in opinions how provide more reflected boundary conservation contexts. Rural households further from border favored local closure whereas stakeholder preferences urban public associated greater support offshore port aquaculture infrastructure developments. Previously measured losses catch production most hidden by lack potential estimates. Lost sustainability could be recovered increased resource capacity, monitoring, increases compliance. Village level economics transnational contexts require multilevel good coordination manage diverse capacities, needs.

Язык: Английский

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Variation in coral reef fisheries production, employment, and living wage goals

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Март 31, 2025

Variability in fish production among fringing and island reef systems was explored for the influences of effort-stock-catch-revenue relationships sustainability. Fisheries independent fishable biomass, recovery rates, taxonomic composition, fisheries dependent metrics effort, catch revenue were analyzed an ocean exposed (high production) sheltered environments (low production). Recovery rates biomass closures supported differential predictions with rate r 0.22 ± 0.12 (± 95%CI) reefs 0.07 0.03, which potentially produces 5.6 0.91 2.8 0.3 tons/km²/y at MSY respectively. Both types had high effort yields below indicating overfishing by metrics. Multiple lines evidence indicate that sustainability bounded minimum acceptable or opportunity cost income thresholds rather than reef’s natural productivity. For example, higher lower exhibited production/biomass (P/B) turnover faster declining per area reefs. Fishing declined over ~ 34-month study period to stabilize Catch-per-Unit Effort (CPUE) both values between national poverty individual thresholds. The more productive a greater yield deficit would require larger reduction daily fishing (40% versus 15%) achieve censused stock levels. less considerable disproportionate losses key vulnerable schooling taxa resulted 25% relative predicted potential yield. Protecting aggregations reducing should increase wealth. Stock is required recover likely prevented rising prices resource extraction subsidies reduce losses.

Язык: Английский

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A rapid approach to assessing the vulnerability of Mozambican fisheries’ species to climate change

PLOS Climate, Год журнала: 2024, Номер 3(5), С. e0000372 - e0000372

Опубликована: Май 7, 2024

Mozambique is amongst the most vulnerable of Western Indian Ocean (WIO] countries to impacts climate change on its marine fisheries. We used rapid assessment methods evaluate sensitivity, exposure and vulnerability fisheries species change, appropriate for data-deficient, developing in region. Species were selected based their importance industrial artisanal fisheries’ landings, further prioritized by local experts. Species’ attributes likely be sensitive identified scored, utilizing life history or biological characteristics. Sea Surface Temperature (SST] was prominent factor which we could confidently predict future change. Most had low medium overall sensitivity with only eight considered highly sensitive. Climate scores high off northern Mozambique, while central southern regions generally exposure. Ten received a High score, 14 Medium, 16 Low score. The all fishes, apart from one crustacean; 4 9 strongly estuarine-associated; parrotfish Scarus ghobban . This first attempt use rapid, semi-quantitative, specialist- trait-based anticipated effect WIO. Challenges experienced data paucity, limited resources, large study area, complex oceanography However, simple methodology developed, derived efforts elsewhere, can undertake similar assessments other WIO countries. Raised awareness among small-scale fishing communities necessity, combined adaptation promoting co-management. Also required support government ensure that people flexible

Язык: Английский

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Rising Climate Risk and Loss and Damage to Coastal Subsistence-oriented Livelihoods

Research Square (Research Square), Год журнала: 2023, Номер unknown

Опубликована: Ноя. 21, 2023

Abstract Subsistence-oriented communities in tropical coastal areas face the greatest threat from climate change, with consequences manifesting through diminishing returns small-scale fishing and farming ventures. The complementary climate, sustainable development, biodiversity conservation policies target reducing risks, but effective policy outcomes depend on a thorough understanding of system-wide risk, community adaptation potential gaps, possible economic losses. Using four countries Western Indian Ocean (WIO) region as case, we present framework for quantifying risk to subsistence-oriented communities. On average, losses ecosystem services are predicted increase increasing annual up 23% 32% total value (~ US$ 516,828,468/year) under SSP2-4.5 SSP5-8.5 scenarios by 2050, respectively. A comprehensive assessment service cost inaction can inform actions aimed at adapting, mitigating, compensating loss damage caused change.

Язык: Английский

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Stimulating the capacity to govern the commons

Conservation Biology, Год журнала: 2024, Номер unknown

Опубликована: Июль 24, 2024

Abstract The ability to strengthen governance institutions and fisheries restrictions laws is needed improve conservation management of common‐pool resources. We evaluated the potential for stimulating change with modest interventions by studying fishing village households before after a 27‐month intervention period in high‐priority coral reef area. Interventions included training catch monitoring, stock assessment, mapping grounds, microcredit, gender inclusion, theatrical skills, fuel efficient stoves, participation planning proposal. There was background increase reported formal education, household size, group membership, wealth but decrease fish consumption public services. Of importance, perceived strength 13 benefits 6 increased over period. Finally, correspondence between knowledge agreement recent national moderate high positively correlated. stronger than demographic factors that often influence perceptions, such as village, government services, gender, membership community groups, age responses. In general, perceptions strengths more among women youth adult men respondents. largest changes were strict initially ranked low, specifically closures, parks, species restrictions. Consequently, capacity building overrode common poor people limited employment can have negative conservation.

Язык: Английский

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Downscaling global reference points to assess the sustainability of local fisheries

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2023, Номер unknown

Опубликована: Дек. 16, 2023

Abstract Multispecies coral reef fisheries are typically managed by local communities who often lack research and monitoring capacity, which prevents estimation of well-defined sustainable reference points to perform locally relevant fishery assessments. Recent global advances in modelling have developed pathways use environmental indicators estimate multispecies points. These a promising tool for assessing data-poor but need be downscaled resource practitioners. Here, using small-scale from Papua New Guinea, we assess the sustainability integrating global-scale analyses with local-scale conditions, fish catch, area, standing biomass estimates, fishers’ perceptions. We found that assessment results models applied context our study location provided consistent Specifically, suggest fishing community is overfishing their stocks (i.e., catching more than can sustained) below B MMSY levels maximize production), making overall unsustainable. were fisher perceptions declining abundance mean length, they had spend time finding fish. Our site-level reveals severe exploitation, whose dynamics masked national-scale assessments, emphasizing importance matching assessments scale management. More broadly, shows how when long-term data not available, providing baseline sustainably managing previously un-assessed around globe.

Язык: Английский

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Challenges of Implementing Fisheries and Coastal Management Policies in Climate Refuge on an International Boundary

Опубликована: Янв. 1, 2023

High resource dependency and multiple scales of human influence create challenges for natural management in commons, such as fisheries. To understand these challenges, we studied the on fish, knowledge fisheries, preferences, governance effectiveness, future options fishing villages along Kenyan-Tanzania national boundary. There was high generally modest about fisheries their status but a broad agreement need community engagement basic regulations. However, there considerable variability among solutions that reflected rural-urban international boundary effects. For example, rural had more relative household while urban border wealth. Wealth differences partially preferences offshore port aquaculture developments versus management. Rural communities further from favored local or closure than infrastructure developments. A village located between two groups most unsatisfied with protection closure. The suboptimal production catch hidden stakeholders by lack monitoring known benchmarks. Monitoring conflict resolution neighbors were scaled weakest principles. Therefore, increasing state resources benefits restrictions between-community could support compliance recover lost income. National transnational will require broad-scale intersectoral coordination integrates diverse capacity, needs, skills.

Язык: Английский

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