Bibliographic Details
| Title: |
A Comparative Study of the Effect of Including Full-Fat Tenebrio molitor for Replacing Conventional Ingredients in Practical Diets for Dicentrarchus labrax Juveniles. |
| Authors: |
Flores-Moreno, Sara1,2 (AUTHOR) falarcon@ual.es, Alarcón-López, Francisco Javier2,3 (AUTHOR), Coronel-Domínguez, Antonio J.4 (AUTHOR) ajcordom@gmail.com, Zuasti, Eugenia1 (AUTHOR) mariae.zuasti@juntadeandalucia.es, Hachero-Cruzado, Ismael1,5 (AUTHOR) ismael.hachero@juntadeandalucia.es |
| Source: |
Animals (2076-2615). Jan2025, Vol. 15 Issue 2, p131. 16p. |
| Subject Terms: |
*TENEBRIO molitor, *SOY oil, *SOY proteins, *EUROPEAN seabass, *INSECT growth, *FISH feeds |
| Abstract: |
Simple Summary: Mealworm meal is considered a potential alternative ingredient for replacing vegetable and marine-derived feedstuffs in aquafeeds due to its low carbon footprint, high digestibility, and protein and micronutrient content. The aim of this piece of research was to evaluate the effects of partial substitution of fish and plant meals and oils with insect meals on the growth performance and tissue lipid composition in juvenile seabass. For this purpose, four diets were prepared with different inclusions of full-fat insect meals: two with 5 and 10% substituting mainly fishmeal and two others with 10 and 20% substituting the plant ingredients. The experimental diets were tested against a control diet in a 49-day feeding trial. The results showed that replacing plant ingredients with insect meals improved the growth performance and the muscle and liver lipid profile. Tenebrio molitor (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 (Dicentrarchus labrax). 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−1) compared to fish fed on FM (final weight: 47.0 g and SGR: 1.62% day−1) and CT (final weight: 48.45 g and SGR: 1.71% day−1). 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. [ABSTRACT FROM AUTHOR] |
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