The potential impact of aquaculture on the genetic diversity and conservation of wild fish in sub‐Saharan Africa

Aquatic Conservation Marine and Freshwater Ecosystems, Journal Year: 2024, Volume and Issue: 34(2)

Published: Feb. 1, 2024

Abstract An increasing focus on aquaculture using introduced strains or species poses a serious threat to native wild in sub‐Saharan Africa, yet almost no policies have been enacted regulations put place address this environmental challenge. Aquaculture these regions has traditionally conducted relatively small scale but is currently expanding rapidly and projected continue the coming decades, with use of genetically improved strains. This expansion occurring region known for its high biodiversity, creating challenges fish production without damaging populations. However, few studies assessed impacts changes practice genetic composition diversity The non‐native could cause competition, gene introgression when there interbreeding populations species, displacement possible extinction After providing historical context African aquaculture, review describes current methods breeding improvement programmes main cultured fishes, focusing potential conservation (and selectively bred) farmed species. Existing policies, legislation regarding import farming are then compared across fish‐producing countries. We recommend regional policy framework considering introduction, risk analysis management, human resources development monitoring that be drafted into existing strengthen efforts. conclude by making recommendations refining future research aimed at minimizing Africa. needs implementation responsible guidelines avoid value.

Language: Английский

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Wild fish consumption can balance nutrient retention in farmed fish

Nature Food, Journal Year: 2024, Volume and Issue: 5(3), P. 221 - 229

Published: March 20, 2024

Abstract Wild fish used as aquafeeds could be redirected towards human consumption to support sustainable marine resource use. Here we use mass-balance fish-in/fish-out ratio approaches assess nutrient retention in salmon farming and identify scenarios that provide more nutrient-rich food people. Using data on Norway’s farms, our study revealed six of nine dietary nutrients had higher yields wild for feeds, such anchovies mackerel, than farmed production. Reallocating one-third food-grade feed direct would increase seafood production, while also retaining by-products aquafeeds, thus maximizing utilization resources.

Language: Английский

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Greenhouse gases emissions from aquaculture ponds: Different emission patterns and key microbial processes affected by increased nitrogen loading

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 926, P. 172108 - 172108

Published: March 30, 2024

Language: Английский

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Mixed diets can meet nutrient requirements with lower carbon footprints

Science Advances, Journal Year: 2024, Volume and Issue: 10(15)

Published: April 10, 2024

Achieving sustainable dietary change is essential for safeguarding human and environmental health. However, recommendations based on broad food groups may not accurately reflect real-world realities because individuals select consume dishes with multiple items influenced by diverse context-specific factors. Therefore, here we explored the sustainability trade-offs of choices at dish level through an optimization modeling approach tested in Japan. We estimated nutritional quality, price, carbon footprint major Japanese examined 16 scenarios to identify options that meet requirements minimize footprint. Overall, mixed diets contain more combinations lower footprints compared restrictive scenarios. argue developed enables a better understanding trade-offs, complements existing methods, helps offering nuanced information national sub-national levels.

Language: Английский

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Consumption Patterns and Willingness to Pay for Sustainable Aquatic Food in China

Foods, Journal Year: 2024, Volume and Issue: 13(15), P. 2435 - 2435

Published: Aug. 1, 2024

China, as the world's largest producer, trader, and consumer of aquatic foods, lacks comprehensive research on consumption patterns willingness to pay for sustainable food. This study addressed this gap through an online survey 3403 participants across Chinese provinces. A majority consumers (34.7% participants) consume food twice or more per week, mainly from traditional markets (26%). Most prefer fresh live products (76%), with 42% seeing no difference between farmed wild options. Consumption is higher among older, affluent, urban, coastal residents. Crustaceans, especially shrimp, are frequently consumed species, growing interest in luxury species like salmon abalone. Taste quality emerge primary factors motivating choices purchases. Food safety concern, followed by environmental impact. Notably, 92.4% would extra certified products. Factors influencing a include income, inland residence, price sensitivity, origin consciousness, concerns about environment. The findings highlight that China's industry can become aligning preferences high-quality diverse both production import, while also addressing related provides valuable insights into rapidly transforming market landscape, offering implications innovation promotion patterns.

Language: Английский

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