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Fishes· 2026Q2· Review

Dietary Nitrogen-Free Extract as a Confounding Nutritional Factor in Growth and Digestibility Studies of Arapaima gigas: A Meta-Analysis

J. A. Zambrano, Luís Gustavo Tavares Braga

Short summary

Meta-analysis of 20 studies reveals higher dietary Nitrogen-Free Extract (NFE) in arapaima (Arapaima gigas) is linked to reduced specific growth rate (SGR) and dry matter/gross energy digestibility, suggesting NFE is a key confounding factor in nutritional research for this carnivorous fish.

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Aquatic ScienceAgricultural and Biological Sciences