Data from: High gene flow across large geographic scales reduces extinction risk for a highly specialised coral feeding butterflyfish

Data consists of 2 files:

(1) C lunulatus microsatellite data - Allele frequences for 12 microsatellite loci. Arelquin format data file. Genomic DNA extracted from fin clip tissue samples.

(2) C. trifascialis microsatellite data - Allele frequences for 11 microsatellite loci. Arelquin format data file. Genomic DNA extracted from fin clip tissue samples.

Abstract [Related Publication]: The vulnerability of ecologically specialised species to environmental fluctuations has been well documented. However, population genetic structure can influence vulnerability to environmental change and recent studies have indicated that specialised species may have lower genetic diversity and greater population structuring compared to their generalist counterparts. To examine whether there were differences in population genetic structure between a dietary specialist (Chaetodon trifascialis) and a dietary generalist (Chaetodon lunulatus) we compared the demographic history and levels of gene flow of two related coral-feeding butterflyfishes. Using allele frequencies of ≥11 microsatellite loci and >350 bases of mitochondrial control region sequence our analyses of C. trifascialis and C. lunulatus from five locations across the Pacific Ocean revealed contrasting demographic histories and levels of genetic structure. Heterozygosity excess tests, neutrality tests and mismatch distributions were all highly significant in the dietary specialist C. trifascialis (all P < 0.01), suggesting genetic bottlenecks have occurred in all locations. In contrast, we found little evidence of genetic bottlenecks for the dietary generalist C. lunulatus. High gene flow and low genetic structuring was detected among locations for C. trifascialis (amova: RST = 0.0027, P = 0.371; ΦST = 0.068, P < 0.0001). Contrary to our expectations, a greater level of genetic structuring between locations was detected for C. lunulatus (amova: RST = 0.0277, ΦST = 0.166, both P < 0.0001). These results suggest that dietary specialisation may affect demographic history through reductions in population size following resource declines, without affecting population structure through reductions in gene flow in the same way that habitat specialisation appears to. Although C. trifascialis is highly vulnerable to coral loss, the high gene flow detected here suggests populations will be able to recover from local declines through the migration of individuals.

The full methodology is available in the publication shown in the Related Publications link below.

 

    Data Record Details
    Data record related to this publication Data from: High gene flow across large geographic scales reduces extinction risk for a highly specialised coral feeding butterflyfish
    Data Publication title Data from: High gene flow across large geographic scales reduces extinction risk for a highly specialised coral feeding butterflyfish
  • Description

    Data consists of 2 files:

    (1) C lunulatus microsatellite data - Allele frequences for 12 microsatellite loci. Arelquin format data file. Genomic DNA extracted from fin clip tissue samples.

    (2) C. trifascialis microsatellite data - Allele frequences for 11 microsatellite loci. Arelquin format data file. Genomic DNA extracted from fin clip tissue samples.

    Abstract [Related Publication]: The vulnerability of ecologically specialised species to environmental fluctuations has been well documented. However, population genetic structure can influence vulnerability to environmental change and recent studies have indicated that specialised species may have lower genetic diversity and greater population structuring compared to their generalist counterparts. To examine whether there were differences in population genetic structure between a dietary specialist (Chaetodon trifascialis) and a dietary generalist (Chaetodon lunulatus) we compared the demographic history and levels of gene flow of two related coral-feeding butterflyfishes. Using allele frequencies of ≥11 microsatellite loci and >350 bases of mitochondrial control region sequence our analyses of C. trifascialis and C. lunulatus from five locations across the Pacific Ocean revealed contrasting demographic histories and levels of genetic structure. Heterozygosity excess tests, neutrality tests and mismatch distributions were all highly significant in the dietary specialist C. trifascialis (all P < 0.01), suggesting genetic bottlenecks have occurred in all locations. In contrast, we found little evidence of genetic bottlenecks for the dietary generalist C. lunulatus. High gene flow and low genetic structuring was detected among locations for C. trifascialis (amova: RST = 0.0027, P = 0.371; ΦST = 0.068, P < 0.0001). Contrary to our expectations, a greater level of genetic structuring between locations was detected for C. lunulatus (amova: RST = 0.0277, ΦST = 0.166, both P < 0.0001). These results suggest that dietary specialisation may affect demographic history through reductions in population size following resource declines, without affecting population structure through reductions in gene flow in the same way that habitat specialisation appears to. Although C. trifascialis is highly vulnerable to coral loss, the high gene flow detected here suggests populations will be able to recover from local declines through the migration of individuals.

    The full methodology is available in the publication shown in the Related Publications link below.

     

  • Other Descriptors
    • Descriptor

      This dataset is available from Dryad in  Arlequin format (.arp.bak) and can be opened with a text editor. Dryad data package: Lawton RJ, Messmer V, Pratchett MS, Bay LK (2011) Data from: High gene flow across large geographic scales reduces extinction risk for a highly specialised coral feeding butterflyfish. Dryad Digital Repository. https://doi.org/10.5061/dryad.4m80r

    • Descriptor type Note
  • Data type dataset
  • Keywords
    • specialisation
    • population connectivity
    • coral reefs
    • vulnerability
    • bottleneck
    • Chaetodon lunulatus
    • Chaetodon trifascialis
    • Chaetodontidae
    • ARC Centre of Excellence for Coral Reef Studies
  • Funding source
  • Research grant(s)/Scheme name(s)
  • Research themes
    Tropical Ecosystems, Conservation and Climate Change
    FoR Codes (*)
    • 060411 - Population, Ecological and Evolutionary Genetics
    SEO Codes
    • 960309 - Effects of Climate Change and Variability on the South Pacific (excl. Australia and New Zealand) (excl. Social Impacts)
    • 970105 - Expanding Knowledge in the Environmental Sciences
    • 970106 - Expanding Knowledge in the Biological Sciences
    Specify spatial or temporal setting of the data
    Temporal (time) coverage
  • Start Date
  • End Date
  • Time Period
    Spatial (location) coverage
  • Locations
    • Tissue samples were collected from up to 50 individuals of each species at five locations across the Pacific: Lizard Island, North Great Barrier Reef; Heron Island, South Great Barrier Reef; Kimbe Bay, Papua New Guinea; Noumea, New Caledonia; and Moorea, French Polynesia
    Data Locations

    Type Location Notes
    URL https://doi.org/10.5061/dryad.4m80r
    The Data Manager is: Rebecca Lawton
    College or Centre
    Access conditions Open
  • Alternative access conditions
  • Data record size 2 files: 61.7 KB
  • Related publications
      Name Lawton, Rebecca, Messmer, Vanessa, Pratchett, Morgan, and Bay, Line (2011) High gene flow across large geographic scales reduces extinction risk for a highly specialised coral feeding butterflyfish. Molecular Ecology, 20. pp. 3584-3598.
    • URL http://dx.doi.org/10.1111/j.1365-294X.2011.05207.x
    • Notes
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    • Notes
    Citation Lawton, Rebecca; Messmer, Vanessa; Pratchett, Morgan; Bay, Line (2011): Data from: High gene flow across large geographic scales reduces extinction risk for a highly specialised coral feeding butterflyfish. James Cook University.