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<p>This study evaluated dietary quinoa seed extract (QSE) in Nile tilapia fingerlings (initial weight 6.32 ± 0.09&#xa0;g). Fish were fed a basal diet (CTR) or a diet supplemented with QSE at 0.25, 0.5, or 1.0&#xa0;g kg⁻¹ for 56 days. Results showed that 1.0&#xa0;g kg⁻¹ QSE significantly improved final body weight (33.46 vs. 27.76&#xa0;g in CTR), weight gain, feed conversion ratio, and protein efficiency ratio (<i>P</i> &lt; 0.05). Furthermore, serum total protein and globulin increased, while liver enzymes (ALT, AST) decreased in QSE-fed fish. Also, digestive enzyme activities (amylase, lipase) and antioxidant capacity (catalase, GSH) were enhanced. Notably, all QSE-supplemented groups showed 100% survival following <i>A. veronii</i> challenge versus 50% in controls. Meanwhile, whole-body lipid content increased with QSE supplementation, correlating with upregulated <i>pparγ</i> and <i>lpl</i> and downregulated <i>pparα</i> expression. In conclusion, dietary QSE at 0.5–1.0&#xa0;g kg⁻¹ effectively enhances growth, immunity, and disease resistance in Nile tilapia.</p>

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Dietary quinoa seed extract enhances growth performance, modulates lipid metabolism, stimulates immunity, and protects against Aeromonas veronii in Nile tilapia

  • 期刊论文

  • 发表日期：

    2026年5月12日

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  • Halah Abdulrahman Hafiz,
  • Monya T. Jawharji,
  • Mohammed A. E. Naiel,
  • Nahla E. M. Ismaiel,
  • Fatma Mahsoub,
  • Shimaa A. Sakr,
  • Mustafa Shukry,
  • Salah A. El-Mansy

摘要

This study evaluated dietary quinoa seed extract (QSE) in Nile tilapia fingerlings (initial weight 6.32 ± 0.09 g). Fish were fed a basal diet (CTR) or a diet supplemented with QSE at 0.25, 0.5, or 1.0 g kg⁻¹ for 56 days. Results showed that 1.0 g kg⁻¹ QSE significantly improved final body weight (33.46 vs. 27.76 g in CTR), weight gain, feed conversion ratio, and protein efficiency ratio (P < 0.05). Furthermore, serum total protein and globulin increased, while liver enzymes (ALT, AST) decreased in QSE-fed fish. Also, digestive enzyme activities (amylase, lipase) and antioxidant capacity (catalase, GSH) were enhanced. Notably, all QSE-supplemented groups showed 100% survival following A. veronii challenge versus 50% in controls. Meanwhile, whole-body lipid content increased with QSE supplementation, correlating with upregulated pparγ and lpl and downregulated pparα expression. In conclusion, dietary QSE at 0.5–1.0 g kg⁻¹ effectively enhances growth, immunity, and disease resistance in Nile tilapia.