Eradication of an isolated satellite population of the American bullfrog in a Flemish nature reserve (Belgium)
Project description
This project aims to initiate the full eradication of the invasive American bullfrog in the Molse Nete river valley in Belgium, east of the Dessel-Kwaadmechelen canal, within the Flemish Ecological Network. The targeted population represents a satellite outbreak, offering a critical opportunity for early intervention before further spread occurs.
Threats
Invasive alien species
American bullfrogs are highly invasive and can severely impact native amphibians through predation, competition and disease transmission. This project uses a science-based approach, combining environmental DNA (eDNA) monitoring with intensive trapping to locate and eliminate breeding populations.
By focusing on reproductive individuals and key breeding sites, the project aims to remove the species’ capacity to persist and spread. Post-intervention monitoring will verify success and support integration into long-term regional management strategies.
This project is implemented by the Province of Antwerp.
Project objectives
The project aims to initiate the eradication of the American bullfrog population in the Molse Nete valley through intensive and targeted control measures. It seeks to eliminate reproductive individuals and breeding sites, ensuring the long-term removal of the population.
The project also aims to use eDNA monitoring to guide interventions and verify eradication success.
Finally, it aims to contribute to sustained, multi-year management efforts to protect native biodiversity.
Project activities
- Map distribution using eDNA: Identify infested ponds and breeding sites through eDNA analysis and field surveys.
- Implement targeted trapping: Deploy fyke nets to capture all life stages, focusing on reproductive individuals.
- Apply a strategic trapping system: Use a rotation approach to maximise capture efficiency across sites.
- Monitor effectiveness of interventions: Compare eDNA data before and after actions to assess success.
