Feeding Test of Beta-Apo-2-Carotenal on Rat and Rainbow Trout

Carotenoid content in some body parts of pike (Esox lucius L.) before, during, and post-spawning

“…�-Carotene, however, in rainbow trout accumulates in the digestive tract, zeaxanthin in integument, digestive tract, and flesh, while lutein, in the smallest amounts of the three carotenoids, accumulates in the digestive tract and integument (Hata and Hata 1973). Not only canthaxanthin and astaxan thin, but also apocarotenales are used to increase the economic value of salmonids through administration of artificial feed (Hirao et al 1962). In certain conditions, such as reproduc tive migrations when fishes do not take up feed, some species reduce astaxanthin to zeaxanthin.…”

Carotenoids in the common- and golden form of rainbow trout, Oncorhynchus mykiss Walbaum

“…Only in 1986 over 6 tons and approximately 15 tons of carotenoid pigments in 1990 were used on salmonid farms (Torrissen et al 1989). Apoca-rotenales (Hirao et al 1962), and particularly ketocarotenoids such as canthaxanthin Luquet 1975, 1982;Choubert 1983;Foss et al 1984;Storebakken et al 1986) and astaxanthin (Torrissen and Braekkan 1979;Craik: andHarvey 1986, 1987;Store bakken et al 1987) have been used. The supplementation of :fish feed with carotenoids raises the cost offish production on the farm.…”