Evaluation of growth, proximate composition and fatty acid profile of striped murrel (channa striata) fed on black soldier fly larvae

Summary

This 130-day feeding trial evaluated black soldier fly larvae (BSFL) as a sustainable feed alternative for striped murrel aquaculture across three dietary treatments (0%, 50%, and 100% BSFL replacement). Whilst control fish achieved highest absolute weight gain, partial BSFL replacement (50%) optimised the balance between acceptable growth and beneficial fatty acid retention, particularly polyunsaturated fatty acids including docosahexaenoic acid. The findings suggest partial BSFL inclusion is a viable sustainable alternative to conventional aquaculture feeds without compromising nutritional quality or survival.

Regional applicability

This research addresses a global challenge in sustainable aquaculture intensification. Whilst conducted in an Indian context where striped murrel is commercially farmed, the findings on BSFL as a protein-rich alternative feed source are applicable to United Kingdom aquaculture systems, particularly for species with similar nutritional requirements. However, local regulatory approval and sourcing logistics for BSFL production would require assessment before implementation in UK aquaculture.

Key measures

Weight gain (g), feed conversion ratio (FCR), survival (%), moisture, crude protein, crude fat, crude fibre, ash, fatty acid profile (methyl laurate, linoleic acid, linolenic acid, docosahexaenoic acid)

Outcomes reported

The study measured growth performance (weight gain, feed conversion ratio), survival rates, whole-body proximate composition, and fatty acid profiles in striped murrel fed diets containing 0%, 50%, or 100% black soldier fly larvae substitution over 130 days.

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