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Red tilapia study maps trade-offs in azolla-based fishmeal replacement blend

A 60-day feeding trial published in Veterinary Sciences found that replacing fishmeal in red tilapia diets with a blend of Azolla microphylla meal and soybean meal progressively reduced growth performance and worsened feed conversion as replacement rose from 25% to 75%, while fillet essential amino acid content held up through moderate levels but fell significantly at the highest inclusion rate.