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. 2019 Apr 23;9(4):187.
doi: 10.3390/ani9040187.

Graded Incorporation of Defatted Yellow Mealworm (Tenebrio molitor) in Rainbow Trout (Oncorhynchus mykiss) Diet Improves Growth Performance and Nutrient Retention

Paulo Rema  1 , Subramanian Saravanan  2 , Benjamin Armenjon  3 , Constant Motte  4 , Jorge Dias  5
Affiliations

Graded Incorporation of Defatted Yellow Mealworm (Tenebrio molitor) in Rainbow Trout (Oncorhynchus mykiss) Diet Improves Growth Performance and Nutrient Retention

Paulo Rema et al. Animals (Basel). .

Abstract

Insects are emerging as a sustainable alternative to fishmeal and fish oil in aquafeeds. This study assessed the effect of graded incorporation levels of defatted yellow mealworm (Tenebrio molitor) protein meal on juvenile rainbow trout (Oncorhynchus mykiss) growth performance, body composition, and apparent nutrient digestibility. The trial comprised five dietary treatments: control diet with 25% fishmeal, and four experimental diets with yellow mealworm protein meal at 5%, 7.5%, 15%, or 25%, which corresponded to a fishmeal replacement of 20%, 30%, 60%, or 100%, respectively. After 90 days, the graded incorporation of insect protein meal led to a significant stepwise increase in final body weight, and a significant improvement of specific growth rate, feed conversion ratio, and protein efficiency ratio compared to the control treatment. Regardless of the incorporation level, the insect protein meal had no effects on fish whole-body composition and apparent digestibility coefficients of dry matter, protein, fat, phosphorus, and energy. Protein, phosphorus, and energy retention significantly increased in fish fed the diets with an insect protein meal. In conclusion, the yellow mealworm protein meal could effectively replace 100% of fishmeal in the diet of juvenile rainbow trout with positive effects on its overall zootechnical performance.

Keywords: digestibility; fishmeal; growth performance; insect meal; mealworm; rainbow trout.

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Conflict of interest statement

The authors declare no conflict of interest.

References

    1. FAO . The State of World Fisheries and Aquaculture 2018—Meeting the Sustainable Development Goals. The Food and Agricultural Organization of the United Nations; Rome, Italy: 2018. p. 227.
    1. Henry M., Gasco L., Piccolo G., Fountoulaki E. Review on the use of insects in the diet of farmed fish: Past and future. Anim. Feed Sci. Technol. 2015;203:1–22. doi: 10.1016/j.anifeedsci.2015.03.001. - DOI
    1. Slater M., D‘Abramo L., Engle C.R. Aquaculture Research Priorities for the Next Decade: A Global Perspective. J. World Aquacult. Soc. 2018;49:3–6. doi: 10.1111/jwas.12503. - DOI
    1. Gatlin D., Barrows F., Brown P., Dabrowski K., Gaylord T., Hardy R., Herman E., Hu G., Krogdahl A., Nelson R., et al. Expanding the utilization of sustainable plant products in aquafeeds: A review. Aquac. Res. 2007;38:551–579. doi: 10.1111/j.1365-2109.2007.01704.x. - DOI
    1. Olsen R.L., Hasan M.R. A limited supply of fishmeal: Impact on future increases in global aquaculture production. Trends Food Sci. Technol. 2012;27:120–128. doi: 10.1016/j.tifs.2012.06.003. - DOI

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