High connectivity of the Crocodile Shark between the Atlantic and Southwest Indian Oceans: highlights for conservation
Among the various shark species that are captured as bycatch in commercial fishing operations, the group of pelagic sharks is still one of the least studied and known. Within those, the crocodile shark, Pseudocarcharias kamoharai, a small-sized lamnid shark, is occasionally caught by longline vessel...
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Online Access: | http://hdl.handle.net/10400.1/11320 https://doi.org/10.1371/journal.pone.0117549 |
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/11320 2023-05-15T17:45:46+02:00 High connectivity of the Crocodile Shark between the Atlantic and Southwest Indian Oceans: highlights for conservation da Silva Ferrette, Bruno Lopes Mendonca, Fernando Fernandes Coelho, Rui Vasconcelos de Oliveira, Paulo Guilherme Vieira Hazin, Fabio Hissa Romanov, Evgeny V. Oliveira, Claudio Santos, Miguel Neves Foresti, Fausto 2015-02 http://hdl.handle.net/10400.1/11320 https://doi.org/10.1371/journal.pone.0117549 eng eng Public Library of Science info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F93936%2F2013/PT 1932-6203 http://hdl.handle.net/10400.1/11320 doi:10.1371/journal.pone.0117549 openAccess http://creativecommons.org/licenses/by/4.0/ CC-BY Gulf-Of-Mexico Mitochondrial-Dna Rhizoprionodon-Lalandii Population-genetics Northwest Atlantic Statistical tests Western Atlantic Rhincodon-typus Whale shark Phylogeography article 2015 ftunivalgarve https://doi.org/10.1371/journal.pone.0117549 2022-05-30T08:48:15Z Among the various shark species that are captured as bycatch in commercial fishing operations, the group of pelagic sharks is still one of the least studied and known. Within those, the crocodile shark, Pseudocarcharias kamoharai, a small-sized lamnid shark, is occasionally caught by longline vessels in certain regions of the tropical oceans worldwide. However, the population dynamics of this species, as well as the impact of fishing mortality on its stocks, are still unknown, with the crocodile shark currently one of the least studied of all pelagic sharks. Given this, the present study aimed to assess the population structure of P. kamoharai in several regions of the Atlantic and Indian Oceans using genetic molecular markers. The nucleotide composition of the mitochondrial DNA control region of 255 individuals was analyzed, and 31 haplotypes were found, with an estimated diversity Hd = 0.627, and a nucleotide diversity pi = 0.00167. An analysis of molecular variance (AMOVA) revealed a fixation index phi(ST) = -0.01118, representing an absence of population structure among the sampled regions of the Atlantic Ocean, and between the Atlantic and Indian Oceans. These results show a high degree of gene flow between the studied areas, with a single genetic stock and reduced population variability. In panmictic populations, conservation efforts can be concentrated in more restricted areas, being these representative of the total biodiversity of the species. When necessary, this strategy could be applied to the genetic maintenance of P. kamoharai. Foundation for Research Support of the Sao Paulo State - FAPESP [2011/23787-0, 2010/51903-2]; Portuguese Foundation for Science and Technology (FCT) [SFRH/BPD/93936/2013]; Foundation for Research Support of the Sao Paulo State - FAPESP [2011/23787-0, 2010/51903-2]; Portuguese Foundation for Science and Technology (FCT) [SFRH/BPD/93936/2013] info:eu-repo/semantics/publishedVersion Article in Journal/Newspaper Northwest Atlantic Universidade do Algarve: Sapienta Indian PLOS ONE 10 2 e0117549 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Gulf-Of-Mexico Mitochondrial-Dna Rhizoprionodon-Lalandii Population-genetics Northwest Atlantic Statistical tests Western Atlantic Rhincodon-typus Whale shark Phylogeography |
spellingShingle |
Gulf-Of-Mexico Mitochondrial-Dna Rhizoprionodon-Lalandii Population-genetics Northwest Atlantic Statistical tests Western Atlantic Rhincodon-typus Whale shark Phylogeography da Silva Ferrette, Bruno Lopes Mendonca, Fernando Fernandes Coelho, Rui Vasconcelos de Oliveira, Paulo Guilherme Vieira Hazin, Fabio Hissa Romanov, Evgeny V. Oliveira, Claudio Santos, Miguel Neves Foresti, Fausto High connectivity of the Crocodile Shark between the Atlantic and Southwest Indian Oceans: highlights for conservation |
topic_facet |
Gulf-Of-Mexico Mitochondrial-Dna Rhizoprionodon-Lalandii Population-genetics Northwest Atlantic Statistical tests Western Atlantic Rhincodon-typus Whale shark Phylogeography |
description |
Among the various shark species that are captured as bycatch in commercial fishing operations, the group of pelagic sharks is still one of the least studied and known. Within those, the crocodile shark, Pseudocarcharias kamoharai, a small-sized lamnid shark, is occasionally caught by longline vessels in certain regions of the tropical oceans worldwide. However, the population dynamics of this species, as well as the impact of fishing mortality on its stocks, are still unknown, with the crocodile shark currently one of the least studied of all pelagic sharks. Given this, the present study aimed to assess the population structure of P. kamoharai in several regions of the Atlantic and Indian Oceans using genetic molecular markers. The nucleotide composition of the mitochondrial DNA control region of 255 individuals was analyzed, and 31 haplotypes were found, with an estimated diversity Hd = 0.627, and a nucleotide diversity pi = 0.00167. An analysis of molecular variance (AMOVA) revealed a fixation index phi(ST) = -0.01118, representing an absence of population structure among the sampled regions of the Atlantic Ocean, and between the Atlantic and Indian Oceans. These results show a high degree of gene flow between the studied areas, with a single genetic stock and reduced population variability. In panmictic populations, conservation efforts can be concentrated in more restricted areas, being these representative of the total biodiversity of the species. When necessary, this strategy could be applied to the genetic maintenance of P. kamoharai. Foundation for Research Support of the Sao Paulo State - FAPESP [2011/23787-0, 2010/51903-2]; Portuguese Foundation for Science and Technology (FCT) [SFRH/BPD/93936/2013]; Foundation for Research Support of the Sao Paulo State - FAPESP [2011/23787-0, 2010/51903-2]; Portuguese Foundation for Science and Technology (FCT) [SFRH/BPD/93936/2013] info:eu-repo/semantics/publishedVersion |
format |
Article in Journal/Newspaper |
author |
da Silva Ferrette, Bruno Lopes Mendonca, Fernando Fernandes Coelho, Rui Vasconcelos de Oliveira, Paulo Guilherme Vieira Hazin, Fabio Hissa Romanov, Evgeny V. Oliveira, Claudio Santos, Miguel Neves Foresti, Fausto |
author_facet |
da Silva Ferrette, Bruno Lopes Mendonca, Fernando Fernandes Coelho, Rui Vasconcelos de Oliveira, Paulo Guilherme Vieira Hazin, Fabio Hissa Romanov, Evgeny V. Oliveira, Claudio Santos, Miguel Neves Foresti, Fausto |
author_sort |
da Silva Ferrette, Bruno Lopes |
title |
High connectivity of the Crocodile Shark between the Atlantic and Southwest Indian Oceans: highlights for conservation |
title_short |
High connectivity of the Crocodile Shark between the Atlantic and Southwest Indian Oceans: highlights for conservation |
title_full |
High connectivity of the Crocodile Shark between the Atlantic and Southwest Indian Oceans: highlights for conservation |
title_fullStr |
High connectivity of the Crocodile Shark between the Atlantic and Southwest Indian Oceans: highlights for conservation |
title_full_unstemmed |
High connectivity of the Crocodile Shark between the Atlantic and Southwest Indian Oceans: highlights for conservation |
title_sort |
high connectivity of the crocodile shark between the atlantic and southwest indian oceans: highlights for conservation |
publisher |
Public Library of Science |
publishDate |
2015 |
url |
http://hdl.handle.net/10400.1/11320 https://doi.org/10.1371/journal.pone.0117549 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_relation |
info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F93936%2F2013/PT 1932-6203 http://hdl.handle.net/10400.1/11320 doi:10.1371/journal.pone.0117549 |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0117549 |
container_title |
PLOS ONE |
container_volume |
10 |
container_issue |
2 |
container_start_page |
e0117549 |
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1766149022096031744 |