Tropical fishery nutrient production depends on biomass-based management DOI Creative Commons
Bryan P. Galligan, Tim R. McClanahan

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

Food, power and agency: revealing local post-harvest fisheries practices to improve food access from small-scale fisheries in coastal Kenya DOI Creative Commons
Antonio Allegretti, Johnstone O. Omukoto, Christina C. Hicks

et al.

MAST. Maritime studies/Maritime studies, Journal Year: 2025, Volume and Issue: 24(1)

Published: Jan. 29, 2025

Abstract This article proposes the case of Kenyan coastal fisheries as a potentially crucial reservoir food-related benefits for marginalised and those living in poverty, but where food-centred lens or approach is seldom mainstreamed local national governance. Borrowing insights from post-structuralist marine social sciences, this presents an ethnographic account grassroots practices in-the-making such handling, sorting, allocating fish once caught, how these lead to categorisations classifications fish. sort evidence knowledge around spotlights importance considering post-harvest sector (as opposed activity fishing alone), that is, use catch determines access through micro relations power agency. Through analysis two different locations Watamu Shimoni terms economy overall development, categories highlights necessity fairer distribution rather than solely production (of fish) overly market-oriented.

Language: Английский

Citations

1

Fisheries Sustainability Eroded by Lost Catch Proportionality in a Coral Reef Seascape DOI Open Access
Tim R. McClanahan, Jesse K. Kosgei, Austin T. Humphries

et al.

Sustainability, Journal Year: 2025, Volume and Issue: 17(6), P. 2671 - 2671

Published: March 18, 2025

Coral reef and their ecological services of food production shoreline protection are threatened by unsustainable use. To better understand status, multiple approaches to estimating fisheries sustainability were compared, namely fisheries-independent stock biomass recovery rates, fisheries-dependent landed catches, balanced harvest gear use metrics, fish length measurements. A community was established over a 45-year no-fishing time series from seven reserves compared catch- length-based estimates sustainability. The logistic rates (r = 0.09 ± 0.06 95% confidence interval (CI)) maximum equilibrium total (~150 30 tons/km2) indicated broad range potential sustainable yields, with likely 1.1 3.9 (95% CI; mean 3.8) tons/km2/year. In contrast, the annual linear growth in lower but less variable than surplus estimates, ranging 2.1 3.5 (mean 2.8 tons/km2/year). Realized catches at landing sites still, 1.43 1.52 1.48 0.2 tons/km2/y). Differences between capture largely attributable changes taxonomic composition an imbalance estimated proportionality versus actual rates. Lost due differences vulnerability taxa fishing lack compensatory increased among fishing-resistant taxa. Large proportional losses catch measured snappers, unicorn fish, sweetlips, goatfish, soldierfish, while smaller gains samples found resident herbivorous rabbitfish, parrotfish, groupers. Many these declining have vulnerable schooling life histories that require special habitat reserve characteristics. Evaluations measurements 17 or 7% 12% caught species had sample sizes minimally sufficient for evaluation (>30 individuals 413 2284 captured composed 144 species) spawning metrics Seven met three ratio thresholds Consequently, evaluations poor coverage therefore we unable evaluate larger community. Recommendations future research include understanding consequences variability spillover Management recommendations focus management on abundant unfished locations not contributing yield.

Language: Английский

Citations

1

A bibliometric analysis of the marine fishing landscape in Africa and its implications for sustainable coastal communities’ resilience and governance to the increasing human-environmental risks DOI Open Access
Linda A. Etta, Baker Matovu, Isaac Lukambagire

et al.

Anthropocene Coasts, Journal Year: 2025, Volume and Issue: 8(1)

Published: Jan. 26, 2025

Language: Английский

Citations

0

Tropical fishery nutrient production depends on biomass-based management DOI Creative Commons
Bryan P. Galligan, Tim R. McClanahan

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

Citations

1