A Comparative Study of the Effect of Including Full-Fat <i>Tenebrio molitor</i> for Replacing Conventional Ingredients in Practical Diets for <i>Dicentrarchus labrax</i> Juveniles
<i>Tenebrio molitor</i> (TM) meal is a potential alternative ingredient to plant and fishmeal in aquafeeds due to its high protein content, digestibility, and low environmental impact. However, its low n-3 PUFA (EPA and DHA) content represents one of its main limitations. This study eval...
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2025-01-01
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| author | Sara Flores-Moreno Francisco Javier Alarcón-López Antonio J. Coronel-Domínguez Eugenia Zuasti Ismael Hachero-Cruzado |
| author_facet | Sara Flores-Moreno Francisco Javier Alarcón-López Antonio J. Coronel-Domínguez Eugenia Zuasti Ismael Hachero-Cruzado |
| author_sort | Sara Flores-Moreno |
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| description | <i>Tenebrio molitor</i> (TM) meal is a potential alternative ingredient to plant and fishmeal in aquafeeds due to its high protein content, digestibility, and low environmental impact. However, its low n-3 PUFA (EPA and DHA) content represents one of its main limitations. This study evaluated the effects of replacing fishmeal and plant-derived ingredients (plant proteins and soybean oil) with full-fat TM meal on the growth performance and lipid composition of tissues in juvenile European seabass (<i>Dicentrarchus labrax</i>). Four experimental diets, including 5–10% TM for replacing fishmeal and soybean oil (FM5 and FM10) and 10–20% TM for substituting plant protein ingredients and soybean oil (PI10 and PI20), were tested over 49 days against a control diet (CT). Fish fed on PI20 exhibited the highest growth performance (final weight: 49.73 g and SGR: 1.78% day−<sup>1</sup>) compared to fish fed on FM (final weight: 47.0 g and SGR: 1.62% day−<sup>1</sup>) and CT (final weight: 48.45 g and SGR: 1.71% day−<sup>1</sup>). In general, the diets containing TM modulated the lipid profile in fish tissues by reducing the liver lipid content and muscle triglycerides and increasing the n-3/n-6 ratio compared to the CT diet. However, the most effective approach for modulating those parameters seems to be using the TM meal for replacing the plant ingredients instead of substituting fishmeal. Moreover, this feeding strategy, demonstrated to be useful for promoting the growth of fish owing to the use of the TM meal for replacing fishmeal, resulted in a slight reduction in the final weight of the fish. |
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| institution | Kabale University |
| issn | 2076-2615 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Animals |
| spelling | doaj-art-b1fc9ece412c4aa1bcb027208f6dfa352025-01-24T13:17:41ZengMDPI AGAnimals2076-26152025-01-0115213110.3390/ani15020131A Comparative Study of the Effect of Including Full-Fat <i>Tenebrio molitor</i> for Replacing Conventional Ingredients in Practical Diets for <i>Dicentrarchus labrax</i> JuvenilesSara Flores-Moreno0Francisco Javier Alarcón-López1Antonio J. Coronel-Domínguez2Eugenia Zuasti3Ismael Hachero-Cruzado4Instituto Andaluz de Investigación y Formación Agraria, Pesquera, Alimentaria y de la Producción Ecológica (IFAPA), Centro El Toruño, Junta de Andalucía, Camino Tiro Pichón s/n, 11500 El Puerto de Santa María, Cádiz, SpainLifeBioencapsulation S.L., Parque Científico PITA, 04131 El Alquián, Almería, SpainBeetle Genius 3.0, 41500 Alcalá de Guadaira, Sevilla, SpainInstituto Andaluz de Investigación y Formación Agraria, Pesquera, Alimentaria y de la Producción Ecológica (IFAPA), Centro El Toruño, Junta de Andalucía, Camino Tiro Pichón s/n, 11500 El Puerto de Santa María, Cádiz, SpainInstituto Andaluz de Investigación y Formación Agraria, Pesquera, Alimentaria y de la Producción Ecológica (IFAPA), Centro El Toruño, Junta de Andalucía, Camino Tiro Pichón s/n, 11500 El Puerto de Santa María, Cádiz, Spain<i>Tenebrio molitor</i> (TM) meal is a potential alternative ingredient to plant and fishmeal in aquafeeds due to its high protein content, digestibility, and low environmental impact. However, its low n-3 PUFA (EPA and DHA) content represents one of its main limitations. This study evaluated the effects of replacing fishmeal and plant-derived ingredients (plant proteins and soybean oil) with full-fat TM meal on the growth performance and lipid composition of tissues in juvenile European seabass (<i>Dicentrarchus labrax</i>). Four experimental diets, including 5–10% TM for replacing fishmeal and soybean oil (FM5 and FM10) and 10–20% TM for substituting plant protein ingredients and soybean oil (PI10 and PI20), were tested over 49 days against a control diet (CT). Fish fed on PI20 exhibited the highest growth performance (final weight: 49.73 g and SGR: 1.78% day−<sup>1</sup>) compared to fish fed on FM (final weight: 47.0 g and SGR: 1.62% day−<sup>1</sup>) and CT (final weight: 48.45 g and SGR: 1.71% day−<sup>1</sup>). In general, the diets containing TM modulated the lipid profile in fish tissues by reducing the liver lipid content and muscle triglycerides and increasing the n-3/n-6 ratio compared to the CT diet. However, the most effective approach for modulating those parameters seems to be using the TM meal for replacing the plant ingredients instead of substituting fishmeal. Moreover, this feeding strategy, demonstrated to be useful for promoting the growth of fish owing to the use of the TM meal for replacing fishmeal, resulted in a slight reduction in the final weight of the fish.https://www.mdpi.com/2076-2615/15/2/131<i>Dicentrarchus labrax</i>fatty acid compositionfishmealsustainable protein sources<i>Tenebrio molitor</i> |
| spellingShingle | Sara Flores-Moreno Francisco Javier Alarcón-López Antonio J. Coronel-Domínguez Eugenia Zuasti Ismael Hachero-Cruzado A Comparative Study of the Effect of Including Full-Fat <i>Tenebrio molitor</i> for Replacing Conventional Ingredients in Practical Diets for <i>Dicentrarchus labrax</i> Juveniles Animals <i>Dicentrarchus labrax</i> fatty acid composition fishmeal sustainable protein sources <i>Tenebrio molitor</i> |
| title | A Comparative Study of the Effect of Including Full-Fat <i>Tenebrio molitor</i> for Replacing Conventional Ingredients in Practical Diets for <i>Dicentrarchus labrax</i> Juveniles |
| title_full | A Comparative Study of the Effect of Including Full-Fat <i>Tenebrio molitor</i> for Replacing Conventional Ingredients in Practical Diets for <i>Dicentrarchus labrax</i> Juveniles |
| title_fullStr | A Comparative Study of the Effect of Including Full-Fat <i>Tenebrio molitor</i> for Replacing Conventional Ingredients in Practical Diets for <i>Dicentrarchus labrax</i> Juveniles |
| title_full_unstemmed | A Comparative Study of the Effect of Including Full-Fat <i>Tenebrio molitor</i> for Replacing Conventional Ingredients in Practical Diets for <i>Dicentrarchus labrax</i> Juveniles |
| title_short | A Comparative Study of the Effect of Including Full-Fat <i>Tenebrio molitor</i> for Replacing Conventional Ingredients in Practical Diets for <i>Dicentrarchus labrax</i> Juveniles |
| title_sort | comparative study of the effect of including full fat i tenebrio molitor i for replacing conventional ingredients in practical diets for i dicentrarchus labrax i juveniles |
| topic | <i>Dicentrarchus labrax</i> fatty acid composition fishmeal sustainable protein sources <i>Tenebrio molitor</i> |
| url | https://www.mdpi.com/2076-2615/15/2/131 |
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