Valorisation de l’astaxanthine comme ingrédient fonctionnel dans l’alimentation du tilapia rouge « Oreochromis sp » en aquaculture

Abstract

The aim of this research was to study the effect of astaxanthin, extracted from shrimp waste, on the growth, colour and nutritional quality of red tilapia (Oreochromis sp). Astaxanthin was first extracted from the by-products of red shrimp (Aristeus antennatus), then different diets were prepared using shrimp by-product meal, or a diet enriched with 5 or 10% astaxanthin. Growth (weight and size), carotenoids, dry matter, ash, protein and lipid content were tracked for six weeks. A good yield of carotenoids was obtained from the waste (52.5± 1.64 mg/100g). The results showed a significant improvement in fish pigmentation with a total carotenoid content of 334.96 μg/g with 10% astaxanthin. In terms of growth, enrichment of the diet with 10% astaxanthin resulted in the best size and weight (10.85cm and 19.09g). Nutritionally, this growth was reflected in a good dry matter content (28.47%), ash (3.61%), protein (32.74%) and lipid (3.07%).