J. MolL Stud. (1998), 64,345-354 © The Malacological Society of London 1998 DISTRIBUTION AND ABUNDANCE OF GYMNOSOMATA (GASTROPODA: OPISTHOBRANCHIA) IN THE SOUTHWEST ATLANTIC
The distribution and abundance of gymnosome gas-tropods in the Argentine Sea and Brazil—Malvinas Confluence during 1978-1979 and 1988 were studied. The collections analyzed included 768 quantitative samples obtained between 48°W and the coast, and from 35°S to 55°S. Two species were found. Spongio-b...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1029.4874 2023-05-15T13:48:09+02:00 J. MolL Stud. (1998), 64,345-354 © The Malacological Society of London 1998 DISTRIBUTION AND ABUNDANCE OF GYMNOSOMATA (GASTROPODA: OPISTHOBRANCHIA) IN THE SOUTHWEST ATLANTIC Jose R. Dadon Silvina F. Chauvin The Pennsylvania State University CiteSeerX Archives 1997 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1029.4874 http://mollus.oxfordjournals.org/content/64/3/345.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1029.4874 http://mollus.oxfordjournals.org/content/64/3/345.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://mollus.oxfordjournals.org/content/64/3/345.full.pdf text 1997 ftciteseerx 2016-10-30T00:08:13Z The distribution and abundance of gymnosome gas-tropods in the Argentine Sea and Brazil—Malvinas Confluence during 1978-1979 and 1988 were studied. The collections analyzed included 768 quantitative samples obtained between 48°W and the coast, and from 35°S to 55°S. Two species were found. Spongio-branchaea australis was the most frequent and abundant (up to 730 per 1000 m3); its presence in the area was associated with the core of the Malvinas Current. Clione antarctica was less abundant (maxi-mum abundance: 230 per 1000 m3) and was also associated with the Malvinas Current. The geo-graphic ranges of both species in the area are wider than previously described. Since the range of 5. australis in the area extends far from the range of its prey Clio, it is not clear whether S. australis can feed on the thecosomatous pteropod Limacina (and not only on Clio, as described in the bibliography) or it starves in that area. During the 1978-1979 annual cycle, the abundance of both species followed neither the abundance patterns of their prey nor of the total zooplankton, and differed from each other. The resi-dence time of swarms of both gymnosomes were shorter than one month. As a general pattern, the aggregates are rapidly transported northward by the Malvinas Current and also penetrate the outer shelf water, but they remain there only during a short period and cannot preclude the final expatriation. So, the abundance of gymnosomes in the area depends on passive migration more than intrinsic population factors. Text Antarc* Antarctica Unknown Argentine |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
The distribution and abundance of gymnosome gas-tropods in the Argentine Sea and Brazil—Malvinas Confluence during 1978-1979 and 1988 were studied. The collections analyzed included 768 quantitative samples obtained between 48°W and the coast, and from 35°S to 55°S. Two species were found. Spongio-branchaea australis was the most frequent and abundant (up to 730 per 1000 m3); its presence in the area was associated with the core of the Malvinas Current. Clione antarctica was less abundant (maxi-mum abundance: 230 per 1000 m3) and was also associated with the Malvinas Current. The geo-graphic ranges of both species in the area are wider than previously described. Since the range of 5. australis in the area extends far from the range of its prey Clio, it is not clear whether S. australis can feed on the thecosomatous pteropod Limacina (and not only on Clio, as described in the bibliography) or it starves in that area. During the 1978-1979 annual cycle, the abundance of both species followed neither the abundance patterns of their prey nor of the total zooplankton, and differed from each other. The resi-dence time of swarms of both gymnosomes were shorter than one month. As a general pattern, the aggregates are rapidly transported northward by the Malvinas Current and also penetrate the outer shelf water, but they remain there only during a short period and cannot preclude the final expatriation. So, the abundance of gymnosomes in the area depends on passive migration more than intrinsic population factors. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Jose R. Dadon Silvina F. Chauvin |
spellingShingle |
Jose R. Dadon Silvina F. Chauvin J. MolL Stud. (1998), 64,345-354 © The Malacological Society of London 1998 DISTRIBUTION AND ABUNDANCE OF GYMNOSOMATA (GASTROPODA: OPISTHOBRANCHIA) IN THE SOUTHWEST ATLANTIC |
author_facet |
Jose R. Dadon Silvina F. Chauvin |
author_sort |
Jose R. Dadon |
title |
J. MolL Stud. (1998), 64,345-354 © The Malacological Society of London 1998 DISTRIBUTION AND ABUNDANCE OF GYMNOSOMATA (GASTROPODA: OPISTHOBRANCHIA) IN THE SOUTHWEST ATLANTIC |
title_short |
J. MolL Stud. (1998), 64,345-354 © The Malacological Society of London 1998 DISTRIBUTION AND ABUNDANCE OF GYMNOSOMATA (GASTROPODA: OPISTHOBRANCHIA) IN THE SOUTHWEST ATLANTIC |
title_full |
J. MolL Stud. (1998), 64,345-354 © The Malacological Society of London 1998 DISTRIBUTION AND ABUNDANCE OF GYMNOSOMATA (GASTROPODA: OPISTHOBRANCHIA) IN THE SOUTHWEST ATLANTIC |
title_fullStr |
J. MolL Stud. (1998), 64,345-354 © The Malacological Society of London 1998 DISTRIBUTION AND ABUNDANCE OF GYMNOSOMATA (GASTROPODA: OPISTHOBRANCHIA) IN THE SOUTHWEST ATLANTIC |
title_full_unstemmed |
J. MolL Stud. (1998), 64,345-354 © The Malacological Society of London 1998 DISTRIBUTION AND ABUNDANCE OF GYMNOSOMATA (GASTROPODA: OPISTHOBRANCHIA) IN THE SOUTHWEST ATLANTIC |
title_sort |
j. moll stud. (1998), 64,345-354 © the malacological society of london 1998 distribution and abundance of gymnosomata (gastropoda: opisthobranchia) in the southwest atlantic |
publishDate |
1997 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1029.4874 http://mollus.oxfordjournals.org/content/64/3/345.full.pdf |
geographic |
Argentine |
geographic_facet |
Argentine |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
http://mollus.oxfordjournals.org/content/64/3/345.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1029.4874 http://mollus.oxfordjournals.org/content/64/3/345.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766248805807685632 |