Complexities of reef fisheries in Brazil: a retrospective and functional approach

Reviews in Fish Biology and Fisheries, Journal Year: 2024, Volume and Issue: 34(1), P. 511 - 538

Published: Jan. 2, 2024

Language: Английский

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Modeling the spatial distribution of numbers of coral reef fish species and community types in the Western Indian Ocean faunal province

Marine Ecology Progress Series, Journal Year: 2024, Volume and Issue: 730, P. 59 - 78

Published: Feb. 5, 2024

Predicting and mapping coral reef diversity at moderate scales can assist spatial planning prioritizing conservation activities. We made coarse-scale (6.25 km 2 ) predictive models for numbers of fish species community composition starting with a spatially complete database 70 environmental variables available 7039 mapped cells in the Western Indian Ocean. An ensemble model was created from process variable elimination selectivity to make best predictions irrespective human influences. This compared using preselected commonly used evaluate climate change fishing water quality Many (~27) contributed number models, but local biomass, depth, retention connectivity were dominant predictors. The key human-influenced included biomass distance populations, weaker associations sediments nutrients. Climate-influenced generally median sea surface temperature (SST) contributions declining order SST kurtosis, bimodality, excess summer heat, skewness, rate rise, cover. Community variability explained by richness axes damselfishes-angelfishes butterflyfishes-parrotfishes. Numbers damselfish-angelfish ecologically separated damselfishes declined increasing temperature, cumulative chronic stresses. Species butterflyfish-parrotfish butterflyfish acute variability, rise. Several hotspots found East African Coastal Current Ecoregion centered Tanzania, followed Mayotte, southern Kenya, northern Mozambique. If be maintained, broad distributions combined compensatory responses should maintain high ecological resilience other stressors.

Language: Английский

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Nutrition contributions of coral reef fisheries not enhanced by capture of small fish

Ocean & Coastal Management, Journal Year: 2024, Volume and Issue: 249, P. 107011 - 107011

Published: Jan. 4, 2024

Language: Английский

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Building Coral Reef Resilience Through Assisted Restoration

Coral reefs of the world, Journal Year: 2025, Volume and Issue: unknown, P. 235 - 243

Published: Jan. 1, 2025

Language: Английский

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

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 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.

Language: Английский

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Low optimal fisheries yield creates challenges for sustainability in a climate refugia

Conservation Science and Practice, Journal Year: 2023, Volume and Issue: 5(12)

Published: Oct. 31, 2023

Abstract Reducing resource depletion and promoting ecosystem‐based management are considered key climate change adaptation policies. Therefore, the status of an identified refugia in a semi‐enclosed bay on Kenya–Tanzania border was evaluated for sustainability. Both fisheries stock catch assessment methods found low production excess effort. Stock recovery closures (up to 45 years) determined best‐fit r K values, which established maximum sustainable (MSY) 2.98 ± 0.45 (SEM) tons/km 2 /year. estimates bays' fishing grounds indicated that biomass below MSY predicted produce 1.8 1.0 or 1.1 ton/km /year optimal MSY. However, landed fish at five studied villages varied greatly from 0.22 2.9 therefore considerably lower than nearby ocean‐exposed locations, has been estimated 5–7 modest capture rates will be required allow needed achieve sustainability restore refugia's ecology. The highest stocks near‐MSY yields were captured national reserve. broader implementation reserve's gear‐restriction policies should fisheries. High spatial variability yield patterns indicate interactions between management, compliance, trade connections, governance. In refugia, reducing cumulative impacts require knowing managing limits.

Language: Английский

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Protection efforts have resulted in ~10% of existing fish biomass on coral reefs

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(42)

Published: Oct. 7, 2024

The amount of ocean protected from fishing and other human impacts has often been used as a metric conservation progress. However, protection efforts have highly variable outcomes that depend on local conditions, which makes it difficult to quantify what coral reef date actually achieved at global scale. Here, we develop predictive model how conditions influence ~2,600 sites across 44 ecoregions, much more fish biomass there is reefs compared modeled scenario with no protection. Under the assumptions our model, study reveals without existing would be ~10% less reefs. Thus, estimate led approximately 1 in every 10 kg biomass.

Language: Английский

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Tropical fishery nutrient production depends on biomass-based management

iScience, Journal Year: 2024, Volume and Issue: 27(4), P. 109420 - 109420

Published: March 5, 2024

The need to enhance nutrient production from tropical ecosystems feed the poor could potentially create a new framework for fisheries science and management. Early recommendations have included targeting small fishes increasing species richness of fish catches, which represent departure more traditional approaches such as biomass-based To test these recommendations, we compared outcomes management with hypothesized factors influencing density in nearshore artisanal catches Western Indian Ocean. We found that enhancing depends primarily on achieving targets. Catches dominated by low- mid-trophic level smaller body sizes faster turnover were associated modest increases densities, but variability was relative human nutritional requirements. Therefore, fishery should focus restoring biomass achieve maximum yields sustainability, particularly herbivorous fishes.

Language: Английский

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Evaluating Species at Risk in Data-Limited Fisheries: A Comprehensive Productivity-Susceptibility Analysis of the Most Traded Marine Aquarium Fish

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: March 29, 2024

Abstract The marine aquarium trade is a significant global industry harvesting millions of live coral reef fishes annually. Wild-caught fish dominate public and private aquaria markets in the USA Europe, supporting fisher livelihoods Indo-Pacific. This diverse species-rich considered data-limited, creating barriers to quantify sustainability this fishery net benefit socio-ecological system. We present revised expanded productivity-susceptibility analysis (PSA) framework assess vulnerability overharvesting top 258 traded species, an estimated 92.5% all import volume into 2011. Vulnerability was calculated based on various productivity susceptibility factors, tailored unique life-history selectivity characteristics trade. novel factors that improve model accuracy, methods overcome missing data for individual apply improved Gaussian mixture clustering algorithm objectively classify species as least, moderately, or most vulnerable. Our results show overwhelming 85% evaluated fall least moderately vulnerable classification, with remaining designated high priority localized assessment management initiatives. A comparative case study between our PSA popular FishBase illustrates how it ill-suited handle limitations non-food fishes. PSA, at family level, provide useful information stakeholders serves robust accessible risk tool prioritize their scores.

Language: Английский

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Comparing modeled predictions of coral reef diversity along a latitudinal gradient in Mozambique

Frontiers in Ecology and Evolution, Journal Year: 2024, Volume and Issue: 12

Published: Sept. 30, 2024

Introduction Predictive models based on environmental proxy data are being used to predict biodiversity large and even global scales. Yet, some of the underlying assumptions about relationship between variables predictions require investigations testing consequences using model alternatives, sources, choices, scales, extent, overlap among predictions. Mozambican coral reefs provide a good case study test these given paucity field data, its long coastline, transitions from tropical temperate environments. Methods Three modelling formulations 5 specific were made satellite shipboard measurements extensive fish corals their performance in predicting numbers species taxa data. Model mapped for 1180 ~6.25 km 2 reef cells. Predictions 1) ~1000 sites Western Indian Ocean (WIO) faunal province model, 2) variable selected WIO (WIOMOD) but trained only with (<113 sites), 3) standard redundancy selection procedures. Results discussion Training cross validation indicated modest predictive ability (R ~0.42-0.56%) reasonable transferability. Consequently, there was unexplained variation likely due small-scale variability finer than cell scale. Differences caused by different rankings response relationship. For example, Mozambique-only predicted more fewer taxa, larger role water quality sediments, habitats, temperature variation, lesser human influence WIOMOD. Therefore, differences indicate that scale (i.e. provincial or global) can contribute understanding gross patterns miss important local drivers transitional Nevertheless, 79% 88% cell-level taxonomic diversity had standardized coefficients variations <10%.

Language: Английский

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