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Population genetic structure of estuary perch (Percalates colonorum Gunther) in south-eastern Australia


Stoessel, DJ and van Rooyen, AR and Beheregaray, LB and Raymond, SMC and van Wyk, B and Haddy, J and Lieschke, J and Weeks, AR, Population genetic structure of estuary perch (Percalates colonorum Gunther) in south-eastern Australia, Marine and Freshwater Research, 72, (2) pp. 263-274. ISSN 1323-1650 (2020) [Refereed Article]

Copyright Statement

Copyright CSIRO 2020

DOI: doi:10.1071/MF20024


Estuary perch (Percalates colonorum Gunther) is an estuary dependent fish native to south-eastern Australia that is in decline. There is an increasing emphasis on stocking the species. Understanding the genetic structure across its range is important for guiding optimal stocking strategies. A prior study found some evidence of population genetic structure; however, few genetic markers were used in that assessment. Here, we develop 21 novel polymorphic microsatellite markers to reassess population genetics. Analyses indicate three broad genetic clusters, with populations on mainland Australia exhibiting an isolation by distance pattern. The only known population from Tasmania is genetically and geographically isolated from mainland populations and has very low levels of genetic diversity. We provide recommendations for sourcing broodstock from mainland populations, including describing three broad areas for procuring and releasing broodstock and offspring. The markers and results reported here will prove invaluable for guiding and monitoring the outcomes of stocking and conservation activities.

Item Details

Item Type:Refereed Article
Keywords:estuary perch, genetics, stock structure, conservation, fishery, genetic diversity, stocking, supplementation
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture and fisheries stock assessment
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Fisheries - recreational freshwater
UTAS Author:Haddy, J (Dr James Haddy)
ID Code:140090
Year Published:2020
Deposited By:Fisheries and Aquaculture
Deposited On:2020-07-24
Last Modified:2022-07-07

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