Exploring rice protein concentrate as a sustainable protein replacement for fishmeal in aquafeeds

Kenneth Prudence Abasubong

Authors

Kenneth Prudence Abasubong Department of Fisheries and Aquaculture, Faculty of Agriculture, Akwa Ibom State University (AKSU), PMB 1167, Obio Akpa Campus, Akwa Ibom State, Nigeria

Keywords:

Amino acid, aquaculture, fishmeal, protein replacement, rice protein concentrate

Abstract

The rapid expansion of aquaculture requires cost-effective and sustainable alternatives to conventional protein sources such as fishmeal, whose rising cost and environmental concerns limit its use. Rice protein concentrate (RPC), derived from processed rice grains, is a promising substitute due to its high protein content, balanced amino acid profile, hypoallergenic nature, and wide availability. This review highlights the importance of RPC as a protein replacement in aquafeed, either by partially or totally replacing fishmeal (FM), owing to its nutritional, functional, and environmental merits compared to other plant-based protein sources. The deficiency of certain amino acids, such as lysine and methionine, along with the presence of anti-nutritional compounds, limits their utilization in aquafeeds. Efforts to mitigate these constraints include amino acid supplementation and enzymatic treatments. Additionally, incorporating RPC production into circular bioeconomy frameworks optimizes resource use efficiency and supports environmental sustainability. Continuous multidisciplinary research and innovation will be the determining factors in achieving the full potential of RPC in turning aquaculture systems into resilient, affordable, and sustainable systems worldwide, to avoid repetition of 'systems.

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