A novel technique for tagging the long‐spined sea urchin Diadema antillarum
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چکیده
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 کاملSkeletal changes in the test and jaws of the sea urchin Diadema antillarum in response to food limitation
When food-limited, Diadema antillarum increases the relative size of Aristotle's lantern compared to the size of the test. This is accomplished primarily by decreasing the size of the test: the demipyramid grows at a reduced rate as the test shrinks. These results suggest that an altered relationship between demipyramid and test size can provide evidence for food-limitation in field populations...
متن کاملThe effects of metals on embryo-larval and adult life stages of the sea urchin, Diadema antillarum.
Since the massive population decline of the long-spined sea urchin, Diadema antillarum, in the early 1980s, the dynamics of coral reef ecosystems in the Caribbean have changed tremendously. The absence of D. antillarum, once a keystone herbivore, has led to macroalgal dominance in many of these reef communities. D. antillarum is not only important ecologically, but may also be a sensitive bioin...
متن کاملPopulation characteristics of the sea urchin Diadema antillarum in La Parguera, Puerto Rico, 17 years after the mass mortality event.
Recent reports indicate that populations of the black sea urchin Diadema antillarum are slowly coming back in several localities in the Caribbean after 15 years of absence. In La Parguera, Puerto Rico, urchins were totally absent from reef localities until 1996, when isolated, medium size individuals were observed in shallow reef habitats. To assess the status (distribution, densities and size ...
متن کاملAntibacterial activity of ovary extract from sea urchin Diadema setosum.
OBJECTIVE Sea urchin gonad is considered as a highly prized delicacy in several countries. It is also rich in valuable bioactive compounds including polyunsaturated fatty acids (PUFAs) and β-carotene. This study was undertaken to examine the antimicrobial properties of the ovary extract from sea urchin Diadema setosum against selected Gram-negative and Gram-positive bacteria. MATERIALS AND ME...
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ژورنال
عنوان ژورنال: Sarsia
سال: 2003
ISSN: 0036-4827
DOI: 10.1080/00364820310002867