Mitochondrial cytochrome b variation in sleeper sharks (Squaliformes: Somniosidae)
Sleeper sharks are a poorly studied group of deep-sea sharks. The subgenus, Somniosus, contains three morphologically similar species: S. microcephalus found in the Arctic and North Atlantic; S. pacificus in the North Pacific; and S. antarcticus in the Southern Ocean. These sharks have been reported...
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Online Access: | https://scholar.uwindsor.ca/glierpub/412 https://doi.org/10.1007/s00227-007-0871-1 |
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ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1414 2023-06-11T04:06:17+02:00 Mitochondrial cytochrome b variation in sleeper sharks (Squaliformes: Somniosidae) Murray, Brent William Wang, John Y. Yang, Shih Chu Stevens, John D. Fisk, Aaron Svavarsson, Jörundur 2008-03-01T08:00:00Z https://scholar.uwindsor.ca/glierpub/412 https://doi.org/10.1007/s00227-007-0871-1 unknown Scholarship at UWindsor https://scholar.uwindsor.ca/glierpub/412 doi:10.1007/s00227-007-0871-1 https://doi.org/10.1007/s00227-007-0871-1 Great Lakes Institute for Environmental Research Publications text 2008 ftunivwindsor https://doi.org/10.1007/s00227-007-0871-1 2023-05-06T19:10:50Z Sleeper sharks are a poorly studied group of deep-sea sharks. The subgenus, Somniosus, contains three morphologically similar species: S. microcephalus found in the Arctic and North Atlantic; S. pacificus in the North Pacific; and S. antarcticus in the Southern Ocean. These sharks have been reported mainly in temperate to polar waters and occasionally in subtropical locations. They have not been recorded in tropical waters. This study investigates the relationships among the accepted species of Somniosus through analysis of mitochondrial cytochrome b sequence variation. Seventy-five samples were examined from four sampling locations in the North Pacific, Southern Ocean and North Atlantic. Twenty-one haplotypes were found. A minimum spanning parsimony network separated these haplotypes into two divergent clades, an S. microcephalus and an S. pacificus/antarcticus clade, strongly supporting the distinction of S. microcephalus as a separate species from the Pacific sleeper shark species. Analysis of genetic structure within the S. pacificus/antarcticus clade (analysis of molecular variance, allele frequency comparisons, and a nested clade analysis) showed limited or no differences amongst three populations. Further examination of genetic variation at more variable mtDNA and nuclear markers is needed to examine the species status of S. pacificus and S. antarcticus. © 2007 Springer-Verlag. Text Antarc* antarcticus Arctic North Atlantic Southern Ocean University of Windsor, Ontario: Scholarship at UWindsor Arctic Southern Ocean Pacific Marine Biology 153 6 1015 1022 |
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Open Polar |
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University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
description |
Sleeper sharks are a poorly studied group of deep-sea sharks. The subgenus, Somniosus, contains three morphologically similar species: S. microcephalus found in the Arctic and North Atlantic; S. pacificus in the North Pacific; and S. antarcticus in the Southern Ocean. These sharks have been reported mainly in temperate to polar waters and occasionally in subtropical locations. They have not been recorded in tropical waters. This study investigates the relationships among the accepted species of Somniosus through analysis of mitochondrial cytochrome b sequence variation. Seventy-five samples were examined from four sampling locations in the North Pacific, Southern Ocean and North Atlantic. Twenty-one haplotypes were found. A minimum spanning parsimony network separated these haplotypes into two divergent clades, an S. microcephalus and an S. pacificus/antarcticus clade, strongly supporting the distinction of S. microcephalus as a separate species from the Pacific sleeper shark species. Analysis of genetic structure within the S. pacificus/antarcticus clade (analysis of molecular variance, allele frequency comparisons, and a nested clade analysis) showed limited or no differences amongst three populations. Further examination of genetic variation at more variable mtDNA and nuclear markers is needed to examine the species status of S. pacificus and S. antarcticus. © 2007 Springer-Verlag. |
format |
Text |
author |
Murray, Brent William Wang, John Y. Yang, Shih Chu Stevens, John D. Fisk, Aaron Svavarsson, Jörundur |
spellingShingle |
Murray, Brent William Wang, John Y. Yang, Shih Chu Stevens, John D. Fisk, Aaron Svavarsson, Jörundur Mitochondrial cytochrome b variation in sleeper sharks (Squaliformes: Somniosidae) |
author_facet |
Murray, Brent William Wang, John Y. Yang, Shih Chu Stevens, John D. Fisk, Aaron Svavarsson, Jörundur |
author_sort |
Murray, Brent William |
title |
Mitochondrial cytochrome b variation in sleeper sharks (Squaliformes: Somniosidae) |
title_short |
Mitochondrial cytochrome b variation in sleeper sharks (Squaliformes: Somniosidae) |
title_full |
Mitochondrial cytochrome b variation in sleeper sharks (Squaliformes: Somniosidae) |
title_fullStr |
Mitochondrial cytochrome b variation in sleeper sharks (Squaliformes: Somniosidae) |
title_full_unstemmed |
Mitochondrial cytochrome b variation in sleeper sharks (Squaliformes: Somniosidae) |
title_sort |
mitochondrial cytochrome b variation in sleeper sharks (squaliformes: somniosidae) |
publisher |
Scholarship at UWindsor |
publishDate |
2008 |
url |
https://scholar.uwindsor.ca/glierpub/412 https://doi.org/10.1007/s00227-007-0871-1 |
geographic |
Arctic Southern Ocean Pacific |
geographic_facet |
Arctic Southern Ocean Pacific |
genre |
Antarc* antarcticus Arctic North Atlantic Southern Ocean |
genre_facet |
Antarc* antarcticus Arctic North Atlantic Southern Ocean |
op_source |
Great Lakes Institute for Environmental Research Publications |
op_relation |
https://scholar.uwindsor.ca/glierpub/412 doi:10.1007/s00227-007-0871-1 https://doi.org/10.1007/s00227-007-0871-1 |
op_doi |
https://doi.org/10.1007/s00227-007-0871-1 |
container_title |
Marine Biology |
container_volume |
153 |
container_issue |
6 |
container_start_page |
1015 |
op_container_end_page |
1022 |
_version_ |
1768378149570084864 |