REPORT published in Science Advances

Feeding global aquaculture

Abstract

The growth of animal aquaculture requires ever more feed. Yet, fish and crustacean farming is argued to be sustainable because wild fish use is low and has improved over time. Here, accounting for trimmings and by-products from wild fish in aquaculture feed, and using four different sources of industry-reported feed composition data, we find ratios of fish inputs to farmed outputs of 0.36 to 1.15—27 to 307% higher than a previous estimate of 0.28. Furthermore, a metric that incorporates wild fish mortality during capture and excludes unfed systems raises the wild fish mortality–to–farmed fish output ratio to 0.57 to 1.78. We also evaluate terrestrial ingredients in aquaculture feeds. Widely cited estimates of declines in wild fish use from 1997 to 2017 entailed a trade-off of more than fivefold increase in feed crops over the same period. Our assessment challenges the sustainability of fed aquaculture and its role in food security…

To feed the world, recognize the interconnectedness of aquaculture and fisheries

Efforts to scale up aquaculture are increasingly framed as essential to global food security and ocean sustainability, yet such narratives often obscure the complex and interdependent relationships between aquaculture and wild-capture fisheries. This paper critically interrogates the dominant “feed the world” framing of aquaculture expansion, arguing that treating aquaculture and fisheries as isolated systems undermines social equity, ecological sustainability, and effective food policy.

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Food fraud in the fisheries and aquaculture sector

The report reviews regulatory frameworks as well as standards such as those set by Codex Alimentarius, FAO guidelines, and GFSI‑benchmarked schemes, advocating for harmonized labelling, mandatory scientific names, and improved traceability. It emphasizes the role of consumer awareness and industry transparency in combating fraud.

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