Exchange between populations of Adamussium colbecki (Mollusca: Bivalvia) in the Ross Sea
The endemic Antarctic scallop Adamussium colbecki (Mollusca: Bivalvia) represents a key species in the Ross Sea littoral benthic ecosystem, locally reaching very high densities. This species has an annual gametogenic cycle, with a summer spawning event, and a pelagic larval behaviour. This paper aim...
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Online Access: | http://dx.doi.org/10.1017/s0954102006000678 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102006000678 |
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crcambridgeupr:10.1017/s0954102006000678 2024-06-23T07:47:21+00:00 Exchange between populations of Adamussium colbecki (Mollusca: Bivalvia) in the Ross Sea Guidetti, Marta Marcato, Stefania Chiantore, Mariachiara Patarnello, Tomaso Albertelli, Giancarlo Cattaneo-Vietti, Riccardo 2006 http://dx.doi.org/10.1017/s0954102006000678 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102006000678 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 18, issue 4, page 645-653 ISSN 0954-1020 1365-2079 journal-article 2006 crcambridgeupr https://doi.org/10.1017/s0954102006000678 2024-06-05T04:03:48Z The endemic Antarctic scallop Adamussium colbecki (Mollusca: Bivalvia) represents a key species in the Ross Sea littoral benthic ecosystem, locally reaching very high densities. This species has an annual gametogenic cycle, with a summer spawning event, and a pelagic larval behaviour. This paper aims at describing population structure and genetic polymorphism (using AFLP) of the large populations inhabiting the Ross Sea (Terra Nova Bay and McMurdo Sound) in order to investigate possible genetic exchange between A. colbecki in these areas. In Terra Nova Bay, size-frequency distributions show, generally, the dominance of large individuals, although site related differences are found in the abundance of smaller size classes (less than 40 mm), suggesting that recruitment is not a regular event. All McMurdo sites are characterized by large individuals and, at least during this sampling period, recruitment is completely absent. Nuclear DNA analyses show that the largest differences are found at the largest scale (between McMurdo Sound and Terra Nova Bay), but all populations sampled, even at a smaller spatial scale, have a well-settled genetic structure, notwithstanding the pelagic larval strategy. The panmixia hypothesis has therefore to be rejected for this species. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science McMurdo Sound Ross Sea Cambridge University Press Antarctic McMurdo Sound Ross Sea Terra Nova Bay Antarctic Science 18 4 645 653 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
The endemic Antarctic scallop Adamussium colbecki (Mollusca: Bivalvia) represents a key species in the Ross Sea littoral benthic ecosystem, locally reaching very high densities. This species has an annual gametogenic cycle, with a summer spawning event, and a pelagic larval behaviour. This paper aims at describing population structure and genetic polymorphism (using AFLP) of the large populations inhabiting the Ross Sea (Terra Nova Bay and McMurdo Sound) in order to investigate possible genetic exchange between A. colbecki in these areas. In Terra Nova Bay, size-frequency distributions show, generally, the dominance of large individuals, although site related differences are found in the abundance of smaller size classes (less than 40 mm), suggesting that recruitment is not a regular event. All McMurdo sites are characterized by large individuals and, at least during this sampling period, recruitment is completely absent. Nuclear DNA analyses show that the largest differences are found at the largest scale (between McMurdo Sound and Terra Nova Bay), but all populations sampled, even at a smaller spatial scale, have a well-settled genetic structure, notwithstanding the pelagic larval strategy. The panmixia hypothesis has therefore to be rejected for this species. |
format |
Article in Journal/Newspaper |
author |
Guidetti, Marta Marcato, Stefania Chiantore, Mariachiara Patarnello, Tomaso Albertelli, Giancarlo Cattaneo-Vietti, Riccardo |
spellingShingle |
Guidetti, Marta Marcato, Stefania Chiantore, Mariachiara Patarnello, Tomaso Albertelli, Giancarlo Cattaneo-Vietti, Riccardo Exchange between populations of Adamussium colbecki (Mollusca: Bivalvia) in the Ross Sea |
author_facet |
Guidetti, Marta Marcato, Stefania Chiantore, Mariachiara Patarnello, Tomaso Albertelli, Giancarlo Cattaneo-Vietti, Riccardo |
author_sort |
Guidetti, Marta |
title |
Exchange between populations of Adamussium colbecki (Mollusca: Bivalvia) in the Ross Sea |
title_short |
Exchange between populations of Adamussium colbecki (Mollusca: Bivalvia) in the Ross Sea |
title_full |
Exchange between populations of Adamussium colbecki (Mollusca: Bivalvia) in the Ross Sea |
title_fullStr |
Exchange between populations of Adamussium colbecki (Mollusca: Bivalvia) in the Ross Sea |
title_full_unstemmed |
Exchange between populations of Adamussium colbecki (Mollusca: Bivalvia) in the Ross Sea |
title_sort |
exchange between populations of adamussium colbecki (mollusca: bivalvia) in the ross sea |
publisher |
Cambridge University Press (CUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1017/s0954102006000678 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102006000678 |
geographic |
Antarctic McMurdo Sound Ross Sea Terra Nova Bay |
geographic_facet |
Antarctic McMurdo Sound Ross Sea Terra Nova Bay |
genre |
Antarc* Antarctic Antarctic Science McMurdo Sound Ross Sea |
genre_facet |
Antarc* Antarctic Antarctic Science McMurdo Sound Ross Sea |
op_source |
Antarctic Science volume 18, issue 4, page 645-653 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102006000678 |
container_title |
Antarctic Science |
container_volume |
18 |
container_issue |
4 |
container_start_page |
645 |
op_container_end_page |
653 |
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1802651439032434688 |