Pigmentation supplements for animal feed compositions

Abstract From the Canadian patent

Pigment compositions useful for supplementing marine animal feeds comprise comminuted Haematococcus cells treated to degradation of carotenoids typically, by coating or by combination with an anti-oxidant. Encysted Haematococcus cells are ground at cryogenic temperatures, typically by combining the cells with liquid nitrogen in a suitable impact mill. The resulting powder has an average particle size below about 5 µm. Usually, the Haematococcus will be grown in large-scale culture ponds under controlled conditions.