Hybridization between sympatric hammerhead sharks in the western North Atlantic Ocean
Hybridization between closely related species has been documented across a wide range of taxa but has not been well studied in elasmobranchs. Hammerhead sharks have drawn global conservation concern because they experience some of the highest mortality rates among sharks when interacting with fisher...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6501367/ http://www.ncbi.nlm.nih.gov/pubmed/30940019 https://doi.org/10.1098/rsbl.2019.0004 |
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ftpubmed:oai:pubmedcentral.nih.gov:6501367 2023-05-15T17:32:22+02:00 Hybridization between sympatric hammerhead sharks in the western North Atlantic Ocean Barker, Amanda M. Adams, Douglas H. Driggers, William B. Frazier, Bryan S. Portnoy, David S. 2019-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6501367/ http://www.ncbi.nlm.nih.gov/pubmed/30940019 https://doi.org/10.1098/rsbl.2019.0004 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6501367/ http://www.ncbi.nlm.nih.gov/pubmed/30940019 http://dx.doi.org/10.1098/rsbl.2019.0004 © 2019 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. Conservation Biology Text 2019 ftpubmed https://doi.org/10.1098/rsbl.2019.0004 2020-04-05T00:26:04Z Hybridization between closely related species has been documented across a wide range of taxa but has not been well studied in elasmobranchs. Hammerhead sharks have drawn global conservation concern because they experience some of the highest mortality rates among sharks when interacting with fisheries. Here we report on the detection of hybrids between the globally distributed scalloped hammerhead (Sphyrna lewini) and recently described Carolina hammerhead (S. gilberti) which are only known from the western Atlantic Ocean. Using a genomics approach, 10 first-generation hybrids and 15–17 backcrosses were detected from 554 individuals. The identification of backcrosses demonstrates hybrids are viable, and all backcrosses but one involved a scalloped hammerhead. All hybrids but one possessed Carolina hammerhead mtDNA, indicating sex-biased gene flow between species. Repeated hybridization and backcrossing with scalloped hammerheads could lead to the loss of endemic Carolina hammerheads. Text North Atlantic PubMed Central (PMC) Biology Letters 15 4 20190004 |
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language |
English |
topic |
Conservation Biology |
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Conservation Biology Barker, Amanda M. Adams, Douglas H. Driggers, William B. Frazier, Bryan S. Portnoy, David S. Hybridization between sympatric hammerhead sharks in the western North Atlantic Ocean |
topic_facet |
Conservation Biology |
description |
Hybridization between closely related species has been documented across a wide range of taxa but has not been well studied in elasmobranchs. Hammerhead sharks have drawn global conservation concern because they experience some of the highest mortality rates among sharks when interacting with fisheries. Here we report on the detection of hybrids between the globally distributed scalloped hammerhead (Sphyrna lewini) and recently described Carolina hammerhead (S. gilberti) which are only known from the western Atlantic Ocean. Using a genomics approach, 10 first-generation hybrids and 15–17 backcrosses were detected from 554 individuals. The identification of backcrosses demonstrates hybrids are viable, and all backcrosses but one involved a scalloped hammerhead. All hybrids but one possessed Carolina hammerhead mtDNA, indicating sex-biased gene flow between species. Repeated hybridization and backcrossing with scalloped hammerheads could lead to the loss of endemic Carolina hammerheads. |
format |
Text |
author |
Barker, Amanda M. Adams, Douglas H. Driggers, William B. Frazier, Bryan S. Portnoy, David S. |
author_facet |
Barker, Amanda M. Adams, Douglas H. Driggers, William B. Frazier, Bryan S. Portnoy, David S. |
author_sort |
Barker, Amanda M. |
title |
Hybridization between sympatric hammerhead sharks in the western North Atlantic Ocean |
title_short |
Hybridization between sympatric hammerhead sharks in the western North Atlantic Ocean |
title_full |
Hybridization between sympatric hammerhead sharks in the western North Atlantic Ocean |
title_fullStr |
Hybridization between sympatric hammerhead sharks in the western North Atlantic Ocean |
title_full_unstemmed |
Hybridization between sympatric hammerhead sharks in the western North Atlantic Ocean |
title_sort |
hybridization between sympatric hammerhead sharks in the western north atlantic ocean |
publisher |
The Royal Society |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6501367/ http://www.ncbi.nlm.nih.gov/pubmed/30940019 https://doi.org/10.1098/rsbl.2019.0004 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6501367/ http://www.ncbi.nlm.nih.gov/pubmed/30940019 http://dx.doi.org/10.1098/rsbl.2019.0004 |
op_rights |
© 2019 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. |
op_doi |
https://doi.org/10.1098/rsbl.2019.0004 |
container_title |
Biology Letters |
container_volume |
15 |
container_issue |
4 |
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20190004 |
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1766130439411466240 |