Roles of feed and digestive factors on pigmentation of carotenoids in fishes

Quality Productions of aquaculture have various status for accept between people. Color is a factor in relation of quality. Color is sign of beauty, high quality and health of fish production. Consumers trust natural color of fishes signify of health. Also, color in ornamental fish is a very effective factor on price. Carotenoids have maximum scale between animals after melanines pigments. Fishes do not possess the ability to synthesize carotenoids and to supply these pigments by feed same all vertebrates. Natural and shine color of fishes pale in confined environment. In aquaculture the required pigments to add on diet. In culture condition to supply color for fishes is very expensive therefore to know effective factors on pigmentation is very important. Principle factors effects in retention of carotenoids in fishes contain feed, digestive, species and environment. In relation of feed and digestion these factors involve diet, nutrient contain of pigment, feeding time, feeding frequency, digestive tract and metabolic process that different effect have 0n pigmentation.