Pigmentation of Brook Trout (Salvelinus fontinalis) by Feeding Dried Crustacean Waste

Shrimp and crab wastes were fed to yearling brook trout for 12 weeks. Diets containing 20 and 30% shrimp waste, 20% crab waste, and 0.004% canthaxanthin were compared with a commercial trout diet. The carotenoid contents of the flesh and skin were highest with the canthaxanthin-fed fish, but the 20% shrimp-waste-fed fish had the most desirable color visually within the feeding period used.