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<p>This study was carried out to evaluate the use of wheat bran (WB), pre-treated with exogenous xylanase (X) and glucanase (G) mixture, as an energy source for Nile tilapia (<i>Oreochromis niloticus</i>). However,&#xa0;WB was pre-treated with different concentrations of X and G (X + G) blend (0.0 (control), 0.1, 0.2, 0.3, and 0.4 g/kg WB), for 8 h. Pre-treated WB was incorporated into five isocaloric (18.66 kJ/g gross energy) and isonitrogenous (30% crude protein) diets, designated as WB<sub>0.0</sub>, WB<sub>0.1</sub>, WB<sub>0.2</sub>, WB<sub>0.3</sub>, and WB<sub>0.4</sub>, respectively. The diets were fed to triplicate groups of Nile tilapia (<i>Oreochromis niloticus</i>) fingerling (8–9 g/fish) stocked into 100-L tanks, at 10 fish per tank, three times a day, for 56 days. Compared with the control group (WB<sub>0.0</sub>), fish fed on WB-pretreated diets (WB<sub>0.2</sub>, WB<sub>0.3</sub>, and WB<sub>0.4</sub>) showed significant (<i>p</i> &lt; 0.05) increases in zootechnical performance, with no discernible differences (<i>p</i> &gt; 0.05) among enzyme-treated groups. Similarly, fish fed on WB<sub>0.2</sub>, WB<sub>0.3</sub>, and WB<sub>0.4</sub> diets consumed more feed than those fed the control diet (WB<sub>0.0</sub>), although FCR values did not change significantly (<i>p</i> &gt; 0.05). Intestinal protease and lipase activities were considerably higher (<i>p</i> &lt; 0.05) in fish fed on WB<sub>0.3</sub> and WB<sub>0.4</sub> diets than in the control group (WB0.0). Fish fed on WB<sub>0.3</sub> and WB<sub>0.4</sub> diets showed a significant reduction (<i>p</i> &lt; 0.05) in blood aspartate and alanine aminotransferases, urea nitrogen, and creatinine levels, with an increase in red blood cell and white blood cell counts, total protein, albumin, and globulin compared to other groups. Furthermore, fish given WB<sub>0.3</sub> and WB<sub>0.4</sub> diets showed higher levels of antioxidant and immunological bioindicators than the control group (WB<sub>0.0</sub>). The results of this study recommend the pretreatment of WB with 0.25–0.30 g of xylanase and glucanase blend per kg of WB&#xa0;before its inclusion n fish diets. Feeding Nile tilapia fingerlings on this WB pretreatment level could enhance the growth performance, antioxidant, and immunological biomarkers.</p>

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Dietary wheat bran pretreated with xylanase and glucanase mixture modulates growth performance, antioxidant capacity, and immune response in Nile tilapia fingerlings

  • 期刊论文

  • 发表日期：

    2026年7月23日

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  • Benjamin U. Akpoilih,
  • Ibrahim Adeshina,
  • Adibabari T. Poromon,
  • Mohsen Abdel-Tawwab

摘要

This study was carried out to evaluate the use of wheat bran (WB), pre-treated with exogenous xylanase (X) and glucanase (G) mixture, as an energy source for Nile tilapia (Oreochromis niloticus). However, WB was pre-treated with different concentrations of X and G (X + G) blend (0.0 (control), 0.1, 0.2, 0.3, and 0.4 g/kg WB), for 8 h. Pre-treated WB was incorporated into five isocaloric (18.66 kJ/g gross energy) and isonitrogenous (30% crude protein) diets, designated as WB0.0, WB0.1, WB0.2, WB0.3, and WB0.4, respectively. The diets were fed to triplicate groups of Nile tilapia (Oreochromis niloticus) fingerling (8–9 g/fish) stocked into 100-L tanks, at 10 fish per tank, three times a day, for 56 days. Compared with the control group (WB0.0), fish fed on WB-pretreated diets (WB0.2, WB0.3, and WB0.4) showed significant (p < 0.05) increases in zootechnical performance, with no discernible differences (p > 0.05) among enzyme-treated groups. Similarly, fish fed on WB0.2, WB0.3, and WB0.4 diets consumed more feed than those fed the control diet (WB0.0), although FCR values did not change significantly (p > 0.05). Intestinal protease and lipase activities were considerably higher (p < 0.05) in fish fed on WB0.3 and WB0.4 diets than in the control group (WB0.0). Fish fed on WB0.3 and WB0.4 diets showed a significant reduction (p < 0.05) in blood aspartate and alanine aminotransferases, urea nitrogen, and creatinine levels, with an increase in red blood cell and white blood cell counts, total protein, albumin, and globulin compared to other groups. Furthermore, fish given WB0.3 and WB0.4 diets showed higher levels of antioxidant and immunological bioindicators than the control group (WB0.0). The results of this study recommend the pretreatment of WB with 0.25–0.30 g of xylanase and glucanase blend per kg of WB before its inclusion n fish diets. Feeding Nile tilapia fingerlings on this WB pretreatment level could enhance the growth performance, antioxidant, and immunological biomarkers.