Population differentiation and hybridisation of Australian snubfin (Orcaella heinsohni) and Indo-Pacific humpback (Sousa chinensis) dolphins in North-Western Australia

Alexander M. Brown; Anna M. Kopps; Simon J. Allen; Lars Bejder; Bethan Littleford-Colquhoun; Guido J. Parra; Daniele Cagnazzi; Deborah Thiele; Carol Palmer; Celine H. Frere

doi:10.1371/journal.pone.0101427

Population differentiation and hybridisation of Australian snubfin (Orcaella heinsohni) and Indo-Pacific humpback (Sousa chinensis) dolphins in North-Western Australia

Alexander M. Brown^*, Anna M. Kopps, Simon J. Allen, Lars Bejder, Bethan Littleford-Colquhoun, Guido J. Parra, Daniele Cagnazzi, Deborah Thiele, Carol Palmer, Celine H. Frere

^*Corresponding author for this work

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Abstract

Little is known about the Australian snubfin (Orcaella heinsohni) and Indo-Pacific humpback (Sousa chinensis) dolphins ('snubfin' and 'humpback dolphins', hereafter) of north-western Australia. While both species are listed as 'near threatened' by the IUCN, data deficiencies are impeding rigorous assessment of their conservation status across Australia. Understanding the genetic structure of populations, including levels of gene flow among populations, is important for the assessment of conservation status and the effective management of a species. Using nuclear and mitochondrial DNA markers, we assessed population genetic diversity and differentiation between snubfin dolphins from Cygnet (n = 32) and Roebuck Bays (n = 25), and humpback dolphins from the Dampier Archipelago (n = 19) and the North West Cape (n = 18). All sampling locations were separated by geographic distances >200 km. For each species, we found significant genetic differentiation between sampling locations based on 12 (for snubfin dolphins) and 13 (for humpback dolphins) microsatellite loci (F-ST = 0.05-0.09; P

Original language	English
Article number	e101427
Number of pages	14
Journal	PLoS ONE
Volume	9
Issue number	7
DOIs	https://doi.org/10.1371/journal.pone.0101427
Publication status	Published - 2-Jul-2014

Keywords

BOTTLE-NOSED DOLPHINS
MULTILOCUS GENOTYPE DATA
GENETIC DIFFERENTIATION
MITOCHONDRIAL-DNA
TURSIOPS-TRUNCATUS
LINKAGE DISEQUILIBRIUM
MICROSATELLITE MARKERS
BALAENOPTERA-MUSCULUS
PHOCOENA-PHOCOENA
IMPACT ASSESSMENT

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Population differentiation and hybridisation of Australian snubfin (Orcaella heinsohni) and Indo-Pacific humpback (Sousa chinensis) dolphins in North-Western AustraliaFinal publisher's version, 893 KBLicence: CC BY

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Brown, A. M., Kopps, A. M., Allen, S. J., Bejder, L., Littleford-Colquhoun, B., Parra, G. J., Cagnazzi, D., Thiele, D., Palmer, C., & Frere, C. H. (2014). Population differentiation and hybridisation of Australian snubfin (Orcaella heinsohni) and Indo-Pacific humpback (Sousa chinensis) dolphins in North-Western Australia. PLoS ONE, 9(7), [e101427]. https://doi.org/10.1371/journal.pone.0101427

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title = "Population differentiation and hybridisation of Australian snubfin (Orcaella heinsohni) and Indo-Pacific humpback (Sousa chinensis) dolphins in North-Western Australia",

abstract = "Little is known about the Australian snubfin (Orcaella heinsohni) and Indo-Pacific humpback (Sousa chinensis) dolphins ('snubfin' and 'humpback dolphins', hereafter) of north-western Australia. While both species are listed as 'near threatened' by the IUCN, data deficiencies are impeding rigorous assessment of their conservation status across Australia. Understanding the genetic structure of populations, including levels of gene flow among populations, is important for the assessment of conservation status and the effective management of a species. Using nuclear and mitochondrial DNA markers, we assessed population genetic diversity and differentiation between snubfin dolphins from Cygnet (n = 32) and Roebuck Bays (n = 25), and humpback dolphins from the Dampier Archipelago (n = 19) and the North West Cape (n = 18). All sampling locations were separated by geographic distances >200 km. For each species, we found significant genetic differentiation between sampling locations based on 12 (for snubfin dolphins) and 13 (for humpback dolphins) microsatellite loci (F-ST = 0.05-0.09; P",

keywords = "BOTTLE-NOSED DOLPHINS, MULTILOCUS GENOTYPE DATA, GENETIC DIFFERENTIATION, MITOCHONDRIAL-DNA, TURSIOPS-TRUNCATUS, LINKAGE DISEQUILIBRIUM, MICROSATELLITE MARKERS, BALAENOPTERA-MUSCULUS, PHOCOENA-PHOCOENA, IMPACT ASSESSMENT",

author = "Brown, {Alexander M.} and Kopps, {Anna M.} and Allen, {Simon J.} and Lars Bejder and Bethan Littleford-Colquhoun and Parra, {Guido J.} and Daniele Cagnazzi and Deborah Thiele and Carol Palmer and Frere, {Celine H.}",

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Brown, AM, Kopps, AM, Allen, SJ, Bejder, L, Littleford-Colquhoun, B, Parra, GJ, Cagnazzi, D, Thiele, D, Palmer, C & Frere, CH 2014, 'Population differentiation and hybridisation of Australian snubfin (Orcaella heinsohni) and Indo-Pacific humpback (Sousa chinensis) dolphins in North-Western Australia', PLoS ONE, vol. 9, no. 7, e101427. https://doi.org/10.1371/journal.pone.0101427

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AU - Allen, Simon J.

AU - Bejder, Lars

AU - Littleford-Colquhoun, Bethan

AU - Parra, Guido J.

AU - Cagnazzi, Daniele

AU - Thiele, Deborah

AU - Palmer, Carol

AU - Frere, Celine H.

PY - 2014/7/2

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N2 - Little is known about the Australian snubfin (Orcaella heinsohni) and Indo-Pacific humpback (Sousa chinensis) dolphins ('snubfin' and 'humpback dolphins', hereafter) of north-western Australia. While both species are listed as 'near threatened' by the IUCN, data deficiencies are impeding rigorous assessment of their conservation status across Australia. Understanding the genetic structure of populations, including levels of gene flow among populations, is important for the assessment of conservation status and the effective management of a species. Using nuclear and mitochondrial DNA markers, we assessed population genetic diversity and differentiation between snubfin dolphins from Cygnet (n = 32) and Roebuck Bays (n = 25), and humpback dolphins from the Dampier Archipelago (n = 19) and the North West Cape (n = 18). All sampling locations were separated by geographic distances >200 km. For each species, we found significant genetic differentiation between sampling locations based on 12 (for snubfin dolphins) and 13 (for humpback dolphins) microsatellite loci (F-ST = 0.05-0.09; P

AB - Little is known about the Australian snubfin (Orcaella heinsohni) and Indo-Pacific humpback (Sousa chinensis) dolphins ('snubfin' and 'humpback dolphins', hereafter) of north-western Australia. While both species are listed as 'near threatened' by the IUCN, data deficiencies are impeding rigorous assessment of their conservation status across Australia. Understanding the genetic structure of populations, including levels of gene flow among populations, is important for the assessment of conservation status and the effective management of a species. Using nuclear and mitochondrial DNA markers, we assessed population genetic diversity and differentiation between snubfin dolphins from Cygnet (n = 32) and Roebuck Bays (n = 25), and humpback dolphins from the Dampier Archipelago (n = 19) and the North West Cape (n = 18). All sampling locations were separated by geographic distances >200 km. For each species, we found significant genetic differentiation between sampling locations based on 12 (for snubfin dolphins) and 13 (for humpback dolphins) microsatellite loci (F-ST = 0.05-0.09; P

KW - BOTTLE-NOSED DOLPHINS

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KW - GENETIC DIFFERENTIATION

KW - MITOCHONDRIAL-DNA

KW - TURSIOPS-TRUNCATUS

KW - LINKAGE DISEQUILIBRIUM

KW - MICROSATELLITE MARKERS

KW - BALAENOPTERA-MUSCULUS

KW - PHOCOENA-PHOCOENA

KW - IMPACT ASSESSMENT

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DO - 10.1371/journal.pone.0101427

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JF - PLOS-One

SN - 1932-6203

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