Naphthaquinone Pigments in the Tropical Sea Urchin Diadema antillarum (Philippi)
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منابع مشابه
The occurrence of melanin in the sea-urchin, Diadema antillarum Philippi.
The characteristic dark color of Diadema antillarum is chiefly attributable to a black pigment, most of which is contained in large epidermal chromatophores (see Fig. 1). A red pigment is also present, but is easily separable from the black, being readily soluble in ethanol and acetone, whereas the black is not. The nature of the red pigment is unknown and we have not studied its properties. Co...
متن کاملThe electrical activity of the radial nerve in Diadema antillarum Philippi and certain other echinoids.
Electrophysiological studies in echinoderms are rare. In echinoids investigations have been made by Takahashi and Sandeman. The former used Diadema setosum, the latter Strongylocentrotus, Tripneustes and Toxopneustes. Takahashi gives a brief account of the electrical concomitant of the photic responses already described in detail by Millott and co-workers. Behavioural studies showed that the ra...
متن کاملEmbryonic, larval and juvenile development of tropical sea urchin, Diadema setosum
Diadema setosum (Leske, 1778), is one of the common echinoids widely distributed in the Indo-West Pacific Ocean, where it occurs from the Red Sea, Persian Gulf and the east coast of Africa to Japan, Australia and Malaysia. To investigate the developmental basis of morphological changes in embryos and larvae, we documented the ontogeny of D. setosum in a controlled laboratory condition at the In...
متن کاملEmbryonic, larval and juvenile development of tropical sea urchin, Diadema setosum
Diadema setosum (Leske, 1778), is one of the common echinoids widely distributed in the Indo-West Pacific Ocean, where it occurs from the Red Sea, Persian Gulf and the east coast of Africa to Japan, Australia and Malaysia. To investigate the developmental basis of morphological changes in embryos and larvae, we documented the ontogeny of D. setosum in a controlled laboratory condition at the In...
متن کاملSpatial and seasonal variation of the gonad index of Diadema antillarum (Echinodermata: Echinoidea) in the Canary Islands
The sea urchin Diadema antillarum Philippi has a tropical-subtropical amphiatlantic distribution. According to Lessios et al. (2001), there are two genetically separate forms, one from the western and central Atlantic (D. antillarum-a) and one from the eastern Atlantic (D. antillarum-b). The latter form is found from the Madeira Archipelago to the Gulf of Guinea, including the Selvages, Canary ...
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ژورنال
عنوان ژورنال: Nature
سال: 1956
ISSN: 0028-0836,1476-4687
DOI: 10.1038/1781185a0