Polychaete Assemblages in South Western Atlantic : Results of “ Shinkai Maru ” Iv , V , X and Xi ( 1978- 1979 ) Cruises in Patagonia and Buenos Aires .
The aim of this paper is to study the polychaete composition from a wide area in the Argentinean shelf, between 36°S and 55°S, by means of samples collected from soft bottoms with Picard dredge, during the "Shinkai Maru" cruises developed in 1978-79. As the study area comprises both the Magellanic and Argentinean Biogeographic Provinces, we analyze if these results show differences in polychaete composition between both Provinces. A total of 816 individuals was studied; 29 families, represented by 70 taxa, were identified. The most frequent (36-57% sampling stations) and abundant families were Onuphidae, Nephtyidae and Ampharetidae, mainly represented by Kinbergonuphis dorsalis, Aglaopha-mus sp. and Ampharete kerguelensis, respectively. Cluster Analysis, SIMPER test and ANOSIM showed two different species assemblages in two well defined areas according to a nearly 60m depth boundary, in correspondence with the classical Magellanic and Argentinean Provinces.
| Main Authors: | , , |
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| Format: | Journal Contribution biblioteca |
| Language: | English |
| Published: |
2010
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| Online Access: | http://dx.doi.org/10.4067/S0718-686X2010000200005 http://hdl.handle.net/1834/17215 |
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