La Trobe University researchers partner with community groups to trial innovative taste aversion technique
A groundbreaking conservation project led by Dr Lígia Pizzatto from La Trobe University’s Centre for Freshwater Ecosystems is set to revolutionize turtle protection in the Murray River Basin. The innovative study, supported by Wodonga Urban Landcare Network (WULN) and partly funded by WIRES National Grant Programs and La Trobe University, aims to condition foxes to avoid turtle nests through taste aversion therapy—a humane, and likely more efficient, alternative to traditional lethal control methods.
The Crisis Facing Freshwater Turtles
The statistics are alarming: foxes destroy more than 90% of freshwater turtle nests in the Murray River Basin, leaving populations comprised almost entirely of aging adults with virtually no juvenile recruitment. This devastating predation pressure has contributed to pushing 44% of Australia’s turtle species onto threatened lists, with two of the three Murray River Basin species—Chelodina expansa and Emydura macquarii—already classified as nationally or regionally threatened.
Unlike their marine cousins that capture public attention and funding, freshwater turtles remain largely unappreciated despite their critical role as scavengers maintaining water quality and ecosystem health. For First Nations communities, these species also hold deep cultural significance as totem animals.
A Novel Solution: Teaching Foxes to Say No
A single fox can consume all eggs turtles lay within the nest in a breeding area. As lethal control cannot fully exterminate foxes from the landscape, and it is difficult to employ in urban areas, other techniques are needed. The research team’s innovative approach centres on conditioning taste aversion (CTA)—essentially training foxes to associate turtle egg consumption with an unpleasant experience. By burying poultry eggs (mimics of turtle eggs) containing a nausea-inducing substance, researchers can create aversion behaviours in foxes.
“This strategy is beautifully simple yet scientifically sophisticated,” explains the research team. The team will try to enhance the conditioning by incorporating different scent cues to strengthen the aversion response and make it more memorable for foxes.
Community-Driven Conservation Science
The project exemplifies modern conservation’s community-centred approach, bringing together First Nations land managers, Landcare volunteers including WULN’s Turtles Albury Wodonga, and other community groups in hands-on research. This citizen science model aims to provide a tool and protocols that communities can continue to apply long after the research phase concludes.
Field experiments will span several wetlands across the Murray, Kiewa, and Ovens Rivers, with wildlife cameras monitoring fox behaviour changes and capture-mark-release surveys tracking turtle population responses. The comprehensive approach will identify the most cost-effective CTA protocols for benefiting turtle populations.
Technology Meets Traditional Knowledge
The research toolkit includes modern wildlife monitoring cameras with remote operation, humane fox and turtle traps, and marking equipment. The technology complements traditional ecological knowledge from First Nations partners, creating a robust foundation for evidence-based conservation.
Beyond the Murray Basin
While focused on local wetlands, the project’s implications may extend far beyond Australia. The protocols developed through this research could protect turtle nests anywhere foxes (or feral pigs) threaten nesting sites, offering a globally applicable conservation tool.
The technique’s non-lethal nature makes it particularly valuable for community-based conservation programs, providing an ethical alternative to lethal control, that aligns with growing public preference for humane wildlife management.
Looking Forward
As the project launches its large-scale trials, the research team anticipates that successful taste aversion conditioning will dramatically reduce nest predation, allowing juvenile turtle recruitment to recover. This population boost could reverse decades of decline and restore these ancient species’ role in maintaining healthy freshwater ecosystems.
The collaboration represents exactly the kind of innovative, community-driven conservation research that Wodonga Urban Landcare Network and La Trobe University champion in their mission to protect vulnerable ecosystems and build community resilience against environmental threats.
For more information about this project or to volunteer to assist with field work, contact Dr Lígia Pizzatto at La Trobe University’s Centre for Freshwater Ecosystems L.PizzattodoPrado@latrobe.edu.au or Wodonga Urban Landcare Network info@wodongalandcare.org.au.
