. The biology of marine animals. Marine animals; Physiology, Comparative. —CH=CH—C=A=C—CH=CH -CH3 I • H3C CH3 CH3 ASTACENE teleosts there are many brightly coloured species having chromatophores charged with carotenoids, and in some varieties these are the dominant kind of coloured cells in the skin. The carotenoids are predominantly xanthophylls, although some ^-carotene occurs in the ovary. Apparently there are only three xanthophyll pigments in this group, namely lutein, taraxanthin and astaxanthin, and a rough division of species can be made on the basis of whether lutein or taraxanthin is
. The biology of marine animals. Marine animals; Physiology, Comparative. —CH=CH—C=A=C—CH=CH -CH3 I • H3C CH3 CH3 ASTACENE teleosts there are many brightly coloured species having chromatophores charged with carotenoids, and in some varieties these are the dominant kind of coloured cells in the skin. The carotenoids are predominantly xanthophylls, although some ^-carotene occurs in the ovary. Apparently there are only three xanthophyll pigments in this group, namely lutein, taraxanthin and astaxanthin, and a rough division of species can be made on the basis of whether lutein or taraxanthin is accumulated. Astaxanthin occurs with either of the first two pigments. Carotenoids are largely desposited in the skin, although considerable amounts are sometimes present in the muscles, ovaries (especially during sexual activity) and in the liver. Some fishes store large amounts of astaxanthin derived from the consumption of invertebrate animals. Beryx dedactylus, for example, a brightly coloured scarlet and yellow fish, is a veritable storehouse of astaxanthin, which occurs in skin, gills, mouth, mucosa and iris. The sock- eye salmon Oncorhynchus nerka acquires brightly coloured flesh (due to accumulation of astaxanthin) during its sojourn in the sea. The surf-perch Cymatogaster aggregates, feeding upon the red shrimp Hippolyte cali- fomiensis, assimilates xanthophylls but rejects carotenes and acidogenic carotenoids. Part of the xanthophyll is stored in the skin, and some excess accumulates temporarily in the brightly coloured rectum of this Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nicol, J. A. Colin (Joseph Arthur Colin), 1915-. New York, Interscience Publishers
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Keywords: ., bookcentury1900, booksubjectmarineanimals, booksubjectphysiology
