juveniles were fed diets containing 0, 25, 50, 100, 200, and 400 mg/kg of synthetic
astaxanthin for 62 days. The inclusion of astaxanthin did not result in significant differences
in growth, weight gain, apparent feed conversion, and feed efficiency of the fish. Blood
biochemistry and liver histology did not change with the different treatments. At the level of
100 mg/kg of inclusion, there were the highest levels of carotenoids in the blood, and muscle …