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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

Citation

Doubleday, ZA and Semmens, JM and Smolenski, AJ and Shaw, PW, Microsatellite DNA markers and morphometrics reveal a complex population structure in a merobenthic octopus species (Octopus maorum) in south-east Australia and New Zealand, Marine Biology, 156, (6) pp. 1183-1192. ISSN 0025-3162 (2009) [Refereed Article]

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

Official URL: http://www.springerlink.com

DOI: doi:10.1007/s00227-009-1160-y

Abstract

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.

Item Details

Item Type:Refereed Article
Keywords:Octopus maorum, octopus, polymorphic microsatellite loci, population genetic structure
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and Estuarine Ecology (incl. Marine Ichthyology)
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Wild Caught Edible Molluscs
Author:Doubleday, ZA (Dr Zoe Doubleday)
Author:Semmens, JM (Associate Professor Jayson Semmens)
Author:Smolenski, AJ (Mr Adam Smolenski)
ID Code:60724
Year Published:2009
Web of Science® Times Cited:17
Deposited By:TAFI - Marine Research Laboratory
Deposited On:2010-02-17
Last Modified:2012-11-01
Downloads:0

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