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Background <p>Black soldier fly larvae are exceptional ingredients, often used to replace fish meal. They can be easily cultured using waste and by-products. This study assesses the effect of black soldier fly larvae (BSFL) meal on the growth of <i>Oreochromis niloticus</i> raised in captivity, as well as the economic impact of replacing fish meal with BSFL meal in its diet.</p> Method <p>Black soldier fly larvae (BSFL) were produced for 15&#xa0;days after egg hatching. The substrate of BSFL production was Soy bran that is a byproduct obtained by processing soy cheese. The larvae of <i>Oreochromis niloticus</i> of average initial weight 0.012 ± 0.00&#xa0;g were randomly distributed in 15 tanks at a rate of 50 larvae per tank. Five different treatments were applied, with TR (imported feed); T0 (diet with 0% incorporation of black soldier fly larvae meal); T40; T50 and T60 are diets with 40%, 50% and 60% incorporation of black soldier fly larvae meal. The feeding frequency was 4 times/day. Each treatment was tested in triplicate for 28&#xa0;days.</p> Results <p>The specific growth rate obtained during the experiment varied significantly (<i>P</i> &lt; 0.05) with the treatments from 2.88 ± 0.09 (T40) to 4.50 ± 0.12%/day (TR). The feed conversion rate (FCR), ranged from 2.25 ± 0.05 (T40) to 1.08 ± 0.04 (T60). The protein efficiency ratio (PER) showed a significant difference (<i>P</i> &lt; 0.05) with the treatment. It ranged from 0.81 ± 0.07 (T40) to 2.34 ± 0.06 (TR). The survival rates varied from (T0) (92.66 ± 3.52) to (T50) (100.00 ± 0.00). The economic conversion ratio (ECR) presented a significant difference (<i>P</i> &lt; 0.05). The best ECR was obtained with T60 (1.62 ± 0.09) and T50 (2.42 ± 0.17). Based on the parameters studied, diet with 40%, 50%, and 60% of BSFL meals showed better performance compared to treatment containing fish meal at 54% (T0). The cost production analyses were used to evaluate the economic impact of utilizing BSFL meal instead of fish meal in <i>O. niloticus</i> feeding.</p> Conclusion <p>It is recommended to use 50% and 60% substitution rates for better economic profitability.</p>

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Complete substitution of fish meal with black soldier flies Hermetia illucens (L. 1758) larvae meal at varying incorporation rates for feeding Oreochromis niloticus raised in captivity

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月13日

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  • Juste Vital Vodounnou,
  • Romaric Iko,
  • Godwin Okou,
  • Diane Kpogue,
  • Simon Ahouansou Montcho,
  • Jean-Claude Micha

摘要

Background

Black soldier fly larvae are exceptional ingredients, often used to replace fish meal. They can be easily cultured using waste and by-products. This study assesses the effect of black soldier fly larvae (BSFL) meal on the growth of Oreochromis niloticus raised in captivity, as well as the economic impact of replacing fish meal with BSFL meal in its diet.

Method

Black soldier fly larvae (BSFL) were produced for 15 days after egg hatching. The substrate of BSFL production was Soy bran that is a byproduct obtained by processing soy cheese. The larvae of Oreochromis niloticus of average initial weight 0.012 ± 0.00 g were randomly distributed in 15 tanks at a rate of 50 larvae per tank. Five different treatments were applied, with TR (imported feed); T0 (diet with 0% incorporation of black soldier fly larvae meal); T40; T50 and T60 are diets with 40%, 50% and 60% incorporation of black soldier fly larvae meal. The feeding frequency was 4 times/day. Each treatment was tested in triplicate for 28 days.

Results

The specific growth rate obtained during the experiment varied significantly (P < 0.05) with the treatments from 2.88 ± 0.09 (T40) to 4.50 ± 0.12%/day (TR). The feed conversion rate (FCR), ranged from 2.25 ± 0.05 (T40) to 1.08 ± 0.04 (T60). The protein efficiency ratio (PER) showed a significant difference (P < 0.05) with the treatment. It ranged from 0.81 ± 0.07 (T40) to 2.34 ± 0.06 (TR). The survival rates varied from (T0) (92.66 ± 3.52) to (T50) (100.00 ± 0.00). The economic conversion ratio (ECR) presented a significant difference (P < 0.05). The best ECR was obtained with T60 (1.62 ± 0.09) and T50 (2.42 ± 0.17). Based on the parameters studied, diet with 40%, 50%, and 60% of BSFL meals showed better performance compared to treatment containing fish meal at 54% (T0). The cost production analyses were used to evaluate the economic impact of utilizing BSFL meal instead of fish meal in O. niloticus feeding.

Conclusion

It is recommended to use 50% and 60% substitution rates for better economic profitability.