Torrissen OJ ; Christiansen R ; Struksnaes G ; Estermann R ;

Aquaculture Nutrition vol. 1 (2)   pp. 77-84, 1995

Inst. Mar. Res., Matre Aquacult. Res. Stn., N-5198 Matredal, Norway

Atlantic salmon, Salmo salar L., were fed nine experimental diets containing from 0 to 200 mg astaxanthin per kg super(-1) for six time periods, ranging from 3 to 21 months, in sea cages at Matre Aquaculture Research Station, Matredal, Norway. The sampled fish had an initial mean weight of 115 g and reached a weight of 3.2 kg at the termination of the experiment. Every third month, 10 fish from each dose and time group were sampled and the astaxanthin concentration in the flesh determined. The amount of astaxanthin in the flesh ranged from 0.7 to 8.9 mg kg super(-1) at the termination of the experiment. This paper discusses deposition of astaxanthin in the flesh of Atlantic salmon in relation to dietary carotenoid levels in the 0-200 mg kg super(-1) range and feeding times of 3-21 months. Under the conditions of this experiment, no significant effect on astaxanthin deposition rate could be achieved by increasing the astaxanthin level above 60 mg kg dry feed super(-1). Atlantic salmon should be fed astaxanthin-supplemented diets during the whole seawater stage in order to obtain maximal astaxanthin level in the flesh

Diets ;  Carotenoids ;  Pigments ;  Bioaccumulation ;  Fish culture ;  Feed composition ;  Salmo salar ;