ART. No 435 Contribution COB No 607 DISTRIBUTION AND DIVERSITY OF ASTEROIDS IN ATLANTIC
-Since the last survey of the distribution of the echinoderm fauna in the deep sea, worked out by MADSEN, more than 100 trawlings in various areas of the Atlantic Ocean give new possibilities of characterizing the faunal assemblages of several basins at depths greater than 1800 m. During 12 cruises...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.486.5399 http://archimer.ifremer.fr/doc/1979/publication-5262.pdf |
| Summary: | -Since the last survey of the distribution of the echinoderm fauna in the deep sea, worked out by MADSEN, more than 100 trawlings in various areas of the Atlantic Ocean give new possibilities of characterizing the faunal assemblages of several basins at depths greater than 1800 m. During 12 cruises conducted by the Centre Octanologique de Bretagne, seven atlantic basins (Cape, Angola, European, Labrador, Greenland, and Norwegian Basins) have been intensively prospectt'd. Comparisons of the asteroid faunas (43 species on the whole) are approached with appropriate similarity index, especially the second Kulczynski coefficient, and esti-mates of density and diversity of the fauna art: analysed within each basin for two ranges of depths ( and s- 3000 m). The distinct fauna, and the correlation of low diversity with high densities observcd in the Greenland, Norwegian, Mediterranean, and Cape Basins confirm the isolation of such areas either by topographie barriers or by special ecological conditions.- |
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