Recovery Actions for Swan Galaxias

Swan galaxias are listed as endangered under the EPBC Act and the Threatened Species Protection Act 1995 and are one of the Australian Government’s priority species under its Threatened Species Strategy 2021-2031. Researchers have identified Swan Galaxias as one of Australia’s most threatened freshwater fish at imminent risk of extinction within the next 20 years.

Building on previous work, this project addressed the key threats to the species and built resilience in the population in anticipation of the impacts of climate change.

Our Approach

This project improved the conservation trajectory of the endangered Swan Galaxias by;

  • Applying new techniques and technologies to habitat modelling to identify previously undiscovered populations and inform site selection for on-ground restoration works;
  • Developing eDNA markers for population sampling as a tool in routine river health monitoring by partner organisations;
  • Translocating Swan Galaxias to new sites to protect genetic diversity and safeguard population size, and;

Riparian restoration of creek beds at sites that hold critical populations to enhance bank stability, provide refugia and mitigate agricultural runoff.

PROJECT PILLARS SWAN GALAXIAS

Background

As well as being one of Australia’s most at-risk freshwater fish, the Swan Galaxias is also one of our most mysterious. Confined to remote locations in Tasmania’s northeast, Swan Galaxias were only discovered in 1978 and we still know very little about their historic range and evolutionary history.

 

Today, only a handful of fragmented and fragile populations remain. Under threat from habitat degradation, declining water quality and predation from invasive species including Brown Trout and Redfin Perch, the Swan Galaxias is endangered and facing extinction. In the sites where they can still be found, they typically remain in the shallow headwater of streams that are inaccessible to introduced fish species. While this gives them some protection from predators, it also makes them more susceptible to climate extremes; five separate populations have been wiped out by droughts and floods since the early 1990s.

Key Milestones

1 ha of habitat restored

2 new populations established

eDNA marker developed and field tested

120 Swan Galaxias translocated

What's Next

Inland Fisheries Service will continue to monitor the translocated Swan Galaxias to ensure these populations survive and flourish.

This project is in line with the United Nations Sustainable Development Goals

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Thanks to our key partners

This project is supported by NRM South through funding from The Australian Government’s National Landcare Program – Environmental Restoration Fund. The project runs from June 2022 – June 2023.