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<p>The accumulation of mercury (Hg) in fish muscle made fish aquaculture products potentially hazardous. This study determined the appropriate humic acid supplementation level in Nile tilapia (<i>Oreochromis niloticus</i>) diets for minimizing Hg accumulation and improving growth performance. The trial used a completely randomized design with four humic acid supplementation treatments (0, 0.2, 0.4, and 0.6&#xa0;g&#xa0;kg⁻<sup>1</sup> of diet) in three replicates, respectively. The initial fish weight ranged from 8.07 to 8.15&#xa0;g; fish were reared (40 fish/aquarium) in recirculating aquaculture systems for 60&#xa0;days of culture. Results showed fish that consumed diets containing mercury accumulated these heavy metals; however, supplementing the fish’s diet with humic acid could mitigate this accumulation. Additionally, fish growth performance and feed consumption were greatly enhanced by the humic acid supplementation of 0.4&#xa0;g&#xa0;kg⁻<sup>1</sup>, but humic acid excess may have negative impacts on fish growth performance. In conclusion, humic acid supplementation of 0.2&#xa0;g&#xa0;kg⁻<sup>1</sup> could be advised to reduce mercury accumulation and promote the growth of Nile tilapia fed a diet containing heavy metals. Overall, the research contributes valuable insights but in future research should be refined to enhance its scientific rigor and practical applicability.</p> Graphical Abstract <p></p>

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Optimizing humic acid supplementation in diets to prevent mercury accumulation and improve growth performance in Nile tilapia (Oreochromis niloticus)

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Rasidi Rasidi,
  • Wahyu Pamungkas,
  • Dewi Puspaningsih,
  • Idil Ardi,
  • Bastiar Nur,
  • Kukuh Adiyana,
  • Eri Setiadi,
  • Titin Kurniasih,
  • Lila Gardenia,
  • Achmad Suhermanto,
  • Eko Setio Wibowo,
  • Iman Rusmana,
  • Tri Heru Prihadi

摘要

The accumulation of mercury (Hg) in fish muscle made fish aquaculture products potentially hazardous. This study determined the appropriate humic acid supplementation level in Nile tilapia (Oreochromis niloticus) diets for minimizing Hg accumulation and improving growth performance. The trial used a completely randomized design with four humic acid supplementation treatments (0, 0.2, 0.4, and 0.6 g kg⁻1 of diet) in three replicates, respectively. The initial fish weight ranged from 8.07 to 8.15 g; fish were reared (40 fish/aquarium) in recirculating aquaculture systems for 60 days of culture. Results showed fish that consumed diets containing mercury accumulated these heavy metals; however, supplementing the fish’s diet with humic acid could mitigate this accumulation. Additionally, fish growth performance and feed consumption were greatly enhanced by the humic acid supplementation of 0.4 g kg⁻1, but humic acid excess may have negative impacts on fish growth performance. In conclusion, humic acid supplementation of 0.2 g kg⁻1 could be advised to reduce mercury accumulation and promote the growth of Nile tilapia fed a diet containing heavy metals. Overall, the research contributes valuable insights but in future research should be refined to enhance its scientific rigor and practical applicability.

Graphical Abstract