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Microsatellite DNA markers and morphometrics reveal a complex population structure in a merobenthic octopus species (Octopus maorum) in south-east Australia and New Zealand
journal contribution
posted on 2023-05-17, 01:22 authored by Doubleday, ZA, Jayson SemmensJayson Semmens, Adam SmolenskiAdam Smolenski, Shaw, PWFive polymorphic microsatellite loci were developed and then used to assess the population genetic structure of a commercially harvested merobenthic octopus species (Octopus maorum) in south-east Australian and New Zealand (NZ) waters. Beak and stylet morphometrics were also used to assess population differentiation in conjunction with the genetic data. Genetic variation across all loci and all sampled populations was very high (mean number alleles = 15, mean expected heterozygosity = 0.85). Microsatellites revealed significant genetic structuring (overall FST = 0.024, p < 0.001), which did not fit an isolation-by-distance model of population differentiation. Divergence was observed between Australian and NZ populations, between South Australia and north-east Tasmania, and between two relatively proximate Tasmanian sites. South Australian and southern Tasmanian populations were genetically homogeneous, indicating a level of connectivity on a scale of 1,500 km. Morphometric data also indicated significant differences between Australian and NZ populations. The patterns of population structuring identified can be explained largely in relation to regional oceanographic features.
History
Publication title
Marine BiologyVolume
156Issue
6Pagination
1183-1192ISSN
0025-3162Department/School
Institute for Marine and Antarctic StudiesPublisher
Springer-VerlagPlace of publication
Heidelberg, GermanyRights statement
The original publication is available at http://www.springerlink.comRepository Status
- Restricted