Genomic analyses suggest strong population connectivity over large spatial scales of the commercially important baitworm, Australonuphis teres (Onuphidae)

Amanda Padovan; Rowan C. Chick; Victoria J. Cole; Ludovic Dutoit; Patricia A. Hutchings; Cameron Jack; Ceridwen I. Fraser

doi:10.1071/MF20044

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Genomic analyses suggest strong population connectivity over large spatial scales of the commercially important baitworm, Australonuphis teres (Onuphidae)

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Genomic analyses suggest strong population connectivity over large spatial scales of the commercially important baitworm, Australonuphis teres (Onuphidae)

Amanda Padovan, Rowan C. Chick, Victoria J. Cole, Ludovic Dutoit, Patricia A. Hutchings, Cameron Jack and Ceridwen I. Fraser

Marine and freshwater research, Vol.71(11), pp.1549-1556

21/05/2020

DOI: https://doi.org/10.1071/MF20044

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Abstract

admixture

fisheries

genotype-by-sequencing

management

polychaete

population structure

SNP

Barriers to dispersal can disrupt gene flow between populations, resulting in genetically distinct populations. Although many marine animals have potential for long-distance dispersal via a planktonic stage, gene flow among populations separated by large geographic distances is not always evident. Polychaetes are ecologically important and have been used as biological surrogates for marine biodiversity. Some polychaete species are used as bait for recreational fisheries, with this demand supporting commercial fisheries for polychaetes to service the retail bait market. However, despite their ecological and economic importance, very little is known about the life history or population dynamics of polychaetes, and few studies have used genetic or genomic approaches to understand polychaete population connectivity. Here, we investigate the population structure of one commonly collected beachworm species used for bait on the eastern coast of Australia, namely, Australonuphis teres, by using genome-wide single-nucleotide polymorphism data. We sampled A. teres from hierarchical nested spatial scales along 900 km of the coast in New South Wales. We identified six genetic groups, but there was no clear geographic pattern of distribution. Our results suggest that there is considerable gene flow among the sampled populations. These high-resolution genomic data support the findings of previous studies, and we infer that oceanographic processes promote genetic exchange among polychaete populations in south-eastern Australia.

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Title: Genomic analyses suggest strong population connectivity over large spatial scales of the commercially important baitworm, Australonuphis teres (Onuphidae)
Creators: Amanda Padovan - Commonwealth Scientific and Industrial Research Organisation
Rowan C. Chick - New South Wales Department of Primary Industries
Victoria J. Cole - New South Wales Department of Primary Industries
Ludovic Dutoit - University of Otago
Patricia A. Hutchings - Australian Museum
Cameron Jack - Australian National University
Ceridwen I. Fraser - University of Otago
Publication Details: Marine and freshwater research, Vol.71(11), pp.1549-1556
Publisher: Csiro Publishing
Number of pages: 8
Identifiers: 991013125995302368
Academic Unit: Faculty of Science and Engineering
Language: English
Resource Type: Journal article

Genomic analyses suggest strong population connectivity over large spatial scales of the commercially important baitworm, Australonuphis teres (Onuphidae)

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UN Sustainable Development Goals (SDGs)

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