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<p>Mealworm (<i>Tenebrio molitor</i>) is a promising sustainable protein source for aquaculture due to its high nutritional value and low environmental impact. This study evaluated the effects of replacing fishmeal with dietary mealworm larvae meal (TM) on the growth performance, body composition, hematological parameters, biochemical indices, and digestive enzyme activities of juvenile stellate sturgeon (<i>Acipenser stellatus</i>). A total of 240 juvenile sturgeons (initial mean weight: 28.08 ± 0.13 g) were randomly distributed into 12 fiberglass tanks. They fed one of four experimental diets containing 0%, 10%, 20%, or 30% TM for 8 weeks, with feeding administered three times daily. The results revealed that fish fed the 10% TM diet exhibited higher growth performance compared to the control (<i>P</i> &lt; 0.05). In contrast, higher inclusion levels (30%) adversely affected growth (<i>P</i> &lt; 0.05). Moisture and protein contents were significantly reduced in fish fed the 30% TM diet (<i>P</i> &lt; 0.05), whereas lipid content increased. No significant differences in body composition were observed between the 10% TM group and the control (<i>P</i> &gt; 0.05). Red blood cell counts were not significantly influenced by dietary TM levels (<i>P</i> &gt; 0.05); however, hemoglobin and hematocrit decreased progressively with increasing TM inclusion up to 30% (<i>P</i> &lt; 0.05). Conversely, white blood cell counts increased with higher TM inclusion levels (<i>P</i> &lt; 0.05). Plasma triglyceride and glucose concentrations also rose significantly in fish fed the 30% TM diet. Regarding digestive enzyme activities, pepsin and chymotrypsin were unaffected by TM inclusion, whereas trypsin activity was significantly reduced in fish fed the 30% TM diet (<i>P</i> &lt; 0.05). Overall, the findings suggest that mealworm larvae meal can successfully replace fishmeal up to 10% in the diets of juvenile stellate sturgeon without disadvantageous effects on growth, body composition, health status, or digestive function.</p>

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Evaluating full-fat mealworm (Tenebrio molitor) meal as a fishmeal alternative: impacts on growth, physiology, and enzyme activity in stellate sturgeon (Acipenser stellatus)

  • 期刊论文

  • 发表日期：

    2025年7月10日

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  • Arash Lebria,
  • Hadi Ershad Langroudi,
  • Mirmasoud Sajjadi,
  • Zabih Ollah Pajand

摘要

Mealworm (Tenebrio molitor) is a promising sustainable protein source for aquaculture due to its high nutritional value and low environmental impact. This study evaluated the effects of replacing fishmeal with dietary mealworm larvae meal (TM) on the growth performance, body composition, hematological parameters, biochemical indices, and digestive enzyme activities of juvenile stellate sturgeon (Acipenser stellatus). A total of 240 juvenile sturgeons (initial mean weight: 28.08 ± 0.13 g) were randomly distributed into 12 fiberglass tanks. They fed one of four experimental diets containing 0%, 10%, 20%, or 30% TM for 8 weeks, with feeding administered three times daily. The results revealed that fish fed the 10% TM diet exhibited higher growth performance compared to the control (P < 0.05). In contrast, higher inclusion levels (30%) adversely affected growth (P < 0.05). Moisture and protein contents were significantly reduced in fish fed the 30% TM diet (P < 0.05), whereas lipid content increased. No significant differences in body composition were observed between the 10% TM group and the control (P > 0.05). Red blood cell counts were not significantly influenced by dietary TM levels (P > 0.05); however, hemoglobin and hematocrit decreased progressively with increasing TM inclusion up to 30% (P < 0.05). Conversely, white blood cell counts increased with higher TM inclusion levels (P < 0.05). Plasma triglyceride and glucose concentrations also rose significantly in fish fed the 30% TM diet. Regarding digestive enzyme activities, pepsin and chymotrypsin were unaffected by TM inclusion, whereas trypsin activity was significantly reduced in fish fed the 30% TM diet (P < 0.05). Overall, the findings suggest that mealworm larvae meal can successfully replace fishmeal up to 10% in the diets of juvenile stellate sturgeon without disadvantageous effects on growth, body composition, health status, or digestive function.