Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus)

Autores
Cassens, Insa; Van Waerebeek, Koen; Best, Peter B.; Tzika, Athanasia; Van Helden, Anton L.; Crespo, Enrique Alberto; Milinkovitch, Michel C.
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Using nine nuclear species-specific microsatellite loci and two mitochondrial genefragments (cytochrome b and control region), we investigated the processes that have shapedthe geographical distribution of genetic diversity exhibited by contemporary dusky dolphin(Lagenorhynchus obscurus) populations. A total of 221 individuals from four locations (Peru,Argentina, Southwest Africa, and New Zealand) were assayed, covering most of the species’distribution range. Although our analyses identify a general demographic decline in thePeruvian dusky dolphin stock (recently affected by high natural and human-induced mortalitylevels), comparison between the different molecular markers hint at an ancient bottleneck thatpredates recent El Niño oscillations and human exploitation. Moreover, we find evidence of adifference in dispersal behavior of dusky dolphins along the South American coast and acrossthe Atlantic: while data in Peruvian and Argentinean waters are best explained by malespecificgene flow between these two populations, our analyses suggest that dusky dolphinsfrom Argentina and Southwest Africa recently separated from an ancestral Atlantic populationand, since then, diverged without considerable gene flow. The inclusion of a few NewZealand samples further confirms the low levels of genetic differentiation among most duskydolphin populations. Only the Peruvian dusky dolphin stock is highly differentiated,especially at mitochondrial loci, suggesting that major fluctuations in its population size haveled to an increased rate of genetic drift.
Fil: Cassens, Insa. Université Libre de Bruxelles; Bélgica
Fil: Van Waerebeek, Koen. Peruvian Centre for Cetacean Research; Perú
Fil: Best, Peter B.. University of Pretoria; Sudáfrica
Fil: Tzika, Athanasia. Université Libre de Bruxelles; Bélgica
Fil: Van Helden, Anton L.. Museum of New Zealand Te Papa Tongarewa; Nueva Zelanda
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Milinkovitch, Michel C.. Université Libre de Bruxelles; Bélgica
Materia
CETACEA
MTDNA
MICROSATELLITES
PHYLOGEOGRAPHY
MALE-BIASED GENE FLOW
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/105921
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/105921
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus)Cassens, InsaVan Waerebeek, KoenBest, Peter B.Tzika, AthanasiaVan Helden, Anton L.Crespo, Enrique AlbertoMilinkovitch, Michel C.CETACEAMTDNAMICROSATELLITESPHYLOGEOGRAPHYMALE-BIASED GENE FLOWhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Using nine nuclear species-specific microsatellite loci and two mitochondrial genefragments (cytochrome b and control region), we investigated the processes that have shapedthe geographical distribution of genetic diversity exhibited by contemporary dusky dolphin(Lagenorhynchus obscurus) populations. A total of 221 individuals from four locations (Peru,Argentina, Southwest Africa, and New Zealand) were assayed, covering most of the species’distribution range. Although our analyses identify a general demographic decline in thePeruvian dusky dolphin stock (recently affected by high natural and human-induced mortalitylevels), comparison between the different molecular markers hint at an ancient bottleneck thatpredates recent El Niño oscillations and human exploitation. Moreover, we find evidence of adifference in dispersal behavior of dusky dolphins along the South American coast and acrossthe Atlantic: while data in Peruvian and Argentinean waters are best explained by malespecificgene flow between these two populations, our analyses suggest that dusky dolphinsfrom Argentina and Southwest Africa recently separated from an ancestral Atlantic populationand, since then, diverged without considerable gene flow. The inclusion of a few NewZealand samples further confirms the low levels of genetic differentiation among most duskydolphin populations. Only the Peruvian dusky dolphin stock is highly differentiated,especially at mitochondrial loci, suggesting that major fluctuations in its population size haveled to an increased rate of genetic drift.Fil: Cassens, Insa. Université Libre de Bruxelles; BélgicaFil: Van Waerebeek, Koen. Peruvian Centre for Cetacean Research; PerúFil: Best, Peter B.. University of Pretoria; SudáfricaFil: Tzika, Athanasia. Université Libre de Bruxelles; BélgicaFil: Van Helden, Anton L.. Museum of New Zealand Te Papa Tongarewa; Nueva ZelandaFil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Milinkovitch, Michel C.. Université Libre de Bruxelles; BélgicaWiley Blackwell Publishing, Inc2004-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/105921Cassens, Insa; Van Waerebeek, Koen; Best, Peter B.; Tzika, Athanasia; Van Helden, Anton L.; et al.; Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus); Wiley Blackwell Publishing, Inc; Molecular Ecology; 14; 1; 12-2004; 107-1210962-1083CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-294X.2004.02407.xinfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-294X.2004.02407.xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:03:31Zoai:ri.conicet.gov.ar:11336/105921instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:03:32.263CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus)
title Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus)
spellingShingle Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus)
Cassens, Insa
CETACEA
MTDNA
MICROSATELLITES
PHYLOGEOGRAPHY
MALE-BIASED GENE FLOW
title_short Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus)
title_full Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus)
title_fullStr Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus)
title_full_unstemmed Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus)
title_sort Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus)
dc.creator.none.fl_str_mv Cassens, Insa
Van Waerebeek, Koen
Best, Peter B.
Tzika, Athanasia
Van Helden, Anton L.
Crespo, Enrique Alberto
Milinkovitch, Michel C.
author Cassens, Insa
author_facet Cassens, Insa
Van Waerebeek, Koen
Best, Peter B.
Tzika, Athanasia
Van Helden, Anton L.
Crespo, Enrique Alberto
Milinkovitch, Michel C.
author_role author
author2 Van Waerebeek, Koen
Best, Peter B.
Tzika, Athanasia
Van Helden, Anton L.
Crespo, Enrique Alberto
Milinkovitch, Michel C.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv CETACEA
MTDNA
MICROSATELLITES
PHYLOGEOGRAPHY
MALE-BIASED GENE FLOW
topic CETACEA
MTDNA
MICROSATELLITES
PHYLOGEOGRAPHY
MALE-BIASED GENE FLOW
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Using nine nuclear species-specific microsatellite loci and two mitochondrial genefragments (cytochrome b and control region), we investigated the processes that have shapedthe geographical distribution of genetic diversity exhibited by contemporary dusky dolphin(Lagenorhynchus obscurus) populations. A total of 221 individuals from four locations (Peru,Argentina, Southwest Africa, and New Zealand) were assayed, covering most of the species’distribution range. Although our analyses identify a general demographic decline in thePeruvian dusky dolphin stock (recently affected by high natural and human-induced mortalitylevels), comparison between the different molecular markers hint at an ancient bottleneck thatpredates recent El Niño oscillations and human exploitation. Moreover, we find evidence of adifference in dispersal behavior of dusky dolphins along the South American coast and acrossthe Atlantic: while data in Peruvian and Argentinean waters are best explained by malespecificgene flow between these two populations, our analyses suggest that dusky dolphinsfrom Argentina and Southwest Africa recently separated from an ancestral Atlantic populationand, since then, diverged without considerable gene flow. The inclusion of a few NewZealand samples further confirms the low levels of genetic differentiation among most duskydolphin populations. Only the Peruvian dusky dolphin stock is highly differentiated,especially at mitochondrial loci, suggesting that major fluctuations in its population size haveled to an increased rate of genetic drift.
Fil: Cassens, Insa. Université Libre de Bruxelles; Bélgica
Fil: Van Waerebeek, Koen. Peruvian Centre for Cetacean Research; Perú
Fil: Best, Peter B.. University of Pretoria; Sudáfrica
Fil: Tzika, Athanasia. Université Libre de Bruxelles; Bélgica
Fil: Van Helden, Anton L.. Museum of New Zealand Te Papa Tongarewa; Nueva Zelanda
Fil: Crespo, Enrique Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Milinkovitch, Michel C.. Université Libre de Bruxelles; Bélgica
description Using nine nuclear species-specific microsatellite loci and two mitochondrial genefragments (cytochrome b and control region), we investigated the processes that have shapedthe geographical distribution of genetic diversity exhibited by contemporary dusky dolphin(Lagenorhynchus obscurus) populations. A total of 221 individuals from four locations (Peru,Argentina, Southwest Africa, and New Zealand) were assayed, covering most of the species’distribution range. Although our analyses identify a general demographic decline in thePeruvian dusky dolphin stock (recently affected by high natural and human-induced mortalitylevels), comparison between the different molecular markers hint at an ancient bottleneck thatpredates recent El Niño oscillations and human exploitation. Moreover, we find evidence of adifference in dispersal behavior of dusky dolphins along the South American coast and acrossthe Atlantic: while data in Peruvian and Argentinean waters are best explained by malespecificgene flow between these two populations, our analyses suggest that dusky dolphinsfrom Argentina and Southwest Africa recently separated from an ancestral Atlantic populationand, since then, diverged without considerable gene flow. The inclusion of a few NewZealand samples further confirms the low levels of genetic differentiation among most duskydolphin populations. Only the Peruvian dusky dolphin stock is highly differentiated,especially at mitochondrial loci, suggesting that major fluctuations in its population size haveled to an increased rate of genetic drift.
publishDate 2004
dc.date.none.fl_str_mv 2004-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/105921
Cassens, Insa; Van Waerebeek, Koen; Best, Peter B.; Tzika, Athanasia; Van Helden, Anton L.; et al.; Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus); Wiley Blackwell Publishing, Inc; Molecular Ecology; 14; 1; 12-2004; 107-121
0962-1083
CONICET Digital
CONICET
url http://hdl.handle.net/11336/105921
identifier_str_mv Cassens, Insa; Van Waerebeek, Koen; Best, Peter B.; Tzika, Athanasia; Van Helden, Anton L.; et al.; Evidence for male dispersal along the coasts but no migration in pelagic waters in dusky dolphins (Lagenorhynchus obscurus); Wiley Blackwell Publishing, Inc; Molecular Ecology; 14; 1; 12-2004; 107-121
0962-1083
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-294X.2004.02407.x
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-294X.2004.02407.x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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