Acknowledgements
We thank Marty Asmus, Renae Ayres, Mark Babbs, Matt Beitzel, Tom Butterfield, Jonathon Doyle, Graeme Hackett, Dean Hartwell, Mark Lintermans, Alasdair McDonald, Duncan McLay, Justin O’Mahony, Luke Pearce, Rohan Rehwinkel, Joanne Sharley, Chris Smith, Daniel Stoessel, Jason Thiem, Zeb Tonkin and Ian Wooden for sample collection, and Maiko Lutz and Anna Polesskiy for lab assistance. This work was supported by Australian Research Council Linkage Grants LP110200017 to Monash University, Flinders University and University of Canberra, with Partner Organizations University of Montana, ACTEW Corporation (now Icon Water), Department of Sustainability and Environment (Victoria) (now within Department of Environment, Land, Water & Planning; DELWP), Fisheries Victoria (now within Department of Economic Development, Jobs, Transport and Resources) and Melbourne Water, and LP160100482 to Monash University and La Trobe University, with Partner Organizations University of Canberra, DELWP, Diversity Arrays Technology, Zoos Victoria, Environment, Planning & Sustainable Development Directorate (ACT Government), and Department of Biodiversity, Conservation and Attractions (Western Australia). Sample collection was supported by funding from the Commonwealth Environmental Water Office, Australian Government. Computationally intensive analyses were run on virtual servers hosted on NeCTAR Research Cloud, courtesy of Monash eResearch. We are grateful to Jennifer Graves, Sridevi Sureshkumar, Sureshkumar Balasubramanian, Craig Dent, Jamie Gearing, Kirill Tsyganov, Robert Bryson-Richardson and Alexei Tulin for helpful discussions and Andrew DeWoody and three anonymous reviewers for their thoughtful comments which helped us to improve the manuscript.