Mitochondrial Phylogeny of Notothenioids: A Molecular Approach to Antarctic Fish Evolution and Biogeography
Antarctic waters represent a unique marine environment delimited by an oceanographic barrier, the Polar Front Zone, and characterized by constant subzero temperatures and presence of sea ice. A group of teleost fish, the Notothenioidei, have adapted to these challenging environmental conditions, und...
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fthighwire:oai:open-archive.highwire.org:sysbio:49/1/114 2023-05-15T13:36:49+02:00 Mitochondrial Phylogeny of Notothenioids: A Molecular Approach to Antarctic Fish Evolution and Biogeography Bargelloni, Luca Marcato, Stefania Zane, Lorenzo Patarnello, Tomaso 2000-01-01 00:00:00.0 text/html http://sysbio.oxfordjournals.org/cgi/content/short/49/1/114 https://doi.org/10.1080/10635150050207429 en eng Oxford University Press http://sysbio.oxfordjournals.org/cgi/content/short/49/1/114 http://dx.doi.org/10.1080/10635150050207429 Copyright (C) 2000, Society of Systematic Biologists Articles TEXT 2000 fthighwire https://doi.org/10.1080/10635150050207429 2013-05-28T04:26:35Z Antarctic waters represent a unique marine environment delimited by an oceanographic barrier, the Polar Front Zone, and characterized by constant subzero temperatures and presence of sea ice. A group of teleost fish, the Notothenioidei, have adapted to these challenging environmental conditions, undergoing a remarkable diversification. In the present study a total of 798 base pairs, generated from partial sequencing of 16S and 12S mitochondrial ribosomal RNA genes, were examined in 33 notothenioid species representative of all families included in the suborder Notothenioidei. Phylogenetic trees, reconstructed on the basis of sequence data by different methods, indicate that traditional hypotheses on notothenioid systematics and biogeography might be in need of reexamination. Molecular evidence suggests that vicariant speciation could be invoked to explain the early divergence of Eleginops maclovinus , a species previously included in the family Nototheniidae, which is now proposed as the closest sister group to all the rest of notothenioids apart from bovichtids. On the other hand, repeated, independent dispersal through the Polar Front is proposed for the divergence of other subantarctic notothenioid species. Likewise, multiple, independent transitions from benthic to pelagic habit are inferred from molecular data, at variance with the more conservative hypothesis based on cladograms reconstructed from morphological data. Text Antarc* Antarctic Sea ice HighWire Press (Stanford University) Antarctic Systematic Biology 49 1 114 129 |
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Articles Bargelloni, Luca Marcato, Stefania Zane, Lorenzo Patarnello, Tomaso Mitochondrial Phylogeny of Notothenioids: A Molecular Approach to Antarctic Fish Evolution and Biogeography |
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description |
Antarctic waters represent a unique marine environment delimited by an oceanographic barrier, the Polar Front Zone, and characterized by constant subzero temperatures and presence of sea ice. A group of teleost fish, the Notothenioidei, have adapted to these challenging environmental conditions, undergoing a remarkable diversification. In the present study a total of 798 base pairs, generated from partial sequencing of 16S and 12S mitochondrial ribosomal RNA genes, were examined in 33 notothenioid species representative of all families included in the suborder Notothenioidei. Phylogenetic trees, reconstructed on the basis of sequence data by different methods, indicate that traditional hypotheses on notothenioid systematics and biogeography might be in need of reexamination. Molecular evidence suggests that vicariant speciation could be invoked to explain the early divergence of Eleginops maclovinus , a species previously included in the family Nototheniidae, which is now proposed as the closest sister group to all the rest of notothenioids apart from bovichtids. On the other hand, repeated, independent dispersal through the Polar Front is proposed for the divergence of other subantarctic notothenioid species. Likewise, multiple, independent transitions from benthic to pelagic habit are inferred from molecular data, at variance with the more conservative hypothesis based on cladograms reconstructed from morphological data. |
format |
Text |
author |
Bargelloni, Luca Marcato, Stefania Zane, Lorenzo Patarnello, Tomaso |
author_facet |
Bargelloni, Luca Marcato, Stefania Zane, Lorenzo Patarnello, Tomaso |
author_sort |
Bargelloni, Luca |
title |
Mitochondrial Phylogeny of Notothenioids: A Molecular Approach to Antarctic Fish Evolution and Biogeography |
title_short |
Mitochondrial Phylogeny of Notothenioids: A Molecular Approach to Antarctic Fish Evolution and Biogeography |
title_full |
Mitochondrial Phylogeny of Notothenioids: A Molecular Approach to Antarctic Fish Evolution and Biogeography |
title_fullStr |
Mitochondrial Phylogeny of Notothenioids: A Molecular Approach to Antarctic Fish Evolution and Biogeography |
title_full_unstemmed |
Mitochondrial Phylogeny of Notothenioids: A Molecular Approach to Antarctic Fish Evolution and Biogeography |
title_sort |
mitochondrial phylogeny of notothenioids: a molecular approach to antarctic fish evolution and biogeography |
publisher |
Oxford University Press |
publishDate |
2000 |
url |
http://sysbio.oxfordjournals.org/cgi/content/short/49/1/114 https://doi.org/10.1080/10635150050207429 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_relation |
http://sysbio.oxfordjournals.org/cgi/content/short/49/1/114 http://dx.doi.org/10.1080/10635150050207429 |
op_rights |
Copyright (C) 2000, Society of Systematic Biologists |
op_doi |
https://doi.org/10.1080/10635150050207429 |
container_title |
Systematic Biology |
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49 |
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1 |
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114 |
op_container_end_page |
129 |
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1766084516320903168 |