University of Tasmania
Browse

File(s) under permanent embargo

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, PW
Five 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 Biology

Volume

156

Issue

6

Pagination

1183-1192

ISSN

0025-3162

Department/School

Institute for Marine and Antarctic Studies

Publisher

Springer-Verlag

Place of publication

Heidelberg, Germany

Rights statement

The original publication is available at http://www.springerlink.com

Repository Status

  • Restricted

Socio-economic Objectives

Wild caught edible molluscs

Usage metrics

    University Of Tasmania

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC