Flesh Quality of Nile Tilapia (Oreochromis niloticus) Cultured in Biofloc System with Different Dietary Protein Levels

Main Article Content

Supalug Kattakdad
Suriya Udduang
Krittima Kasamawut
Woranit Muangmala
Janejira Phakawan
Nittaya Phungam

Abstract

The effects of dietary protein levels on flesh quality of Nile tilapia cultured in a biofloc system were investigated after an 8-week feeding trial. The experimental design was a completely randomized design (CRD) with 3 treatments and 3 replicates. The fish (initial average weight of 30.70±0.70 g) were fed diets with 32% (32%CP-BFT), 30% (30%CP-BFT) and 28% (28%CP-BFT) crude protein and raised in a biofloc system. The results showed that biofloc particles in the 32%CP-BFT treatment had a higher protein content than those in other treatments, which corresponded with protein accumulation in the whole body of fish (p≤0.05). However, no differences were found in the protein accumulated in fillets (p>0.05). The fillet color analysis showed that the 32%CP-BFT treatment had the lowest yellowness values, but no significant differences were found between treatments for brightness, redness, and whiteness index (p>0.05). Water holding capacity showed no significant differences in drip loss, thawing loss, and grilling loss (p>0.05). However, the 32%CP-BFT treatment showed the highest boiling loss (p≤0.05). Texture analysis showed that the 32%CP-BFT treatment had the highest springiness and hardness (p≤0.05), while the pH values showed no significant differences (p>0.05). The analysis of thiobarbituric acid reactive substances (TBARS) in the fillets stored under chilling conditions showed increasing TBARS values with longer storage duration, with no significant differences among treatments (p>0.05).

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How to Cite
Kattakdad, S., Udduang, S. ., Kasamawut, K. ., Muangmala, W. ., Phakawan, J. ., & Phungam, N. . (2025). Flesh Quality of Nile Tilapia (Oreochromis niloticus) Cultured in Biofloc System with Different Dietary Protein Levels. CURRENT APPLIED SCIENCE AND TECHNOLOGY, 26(1), e0265396. https://doi.org/10.55003/cast.2025.265396
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Original Research Articles

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