Tilapia biocontrol

Summary

Mozambique tilapia (Oreochromis mossambicus) are listed in the top 100 of the world’s worst alien invasive species. Both Mozambique tilapia and black mangrove or spotted tilapia (Tilapia mariae) are established in Queensland. Their impacts on natural ecosystems threatens both fishing and tourism industries. The impact of tilapia is currently largely in Queensland but recent incursions in northern New South Wales have caused concern.

While we now have an effective surveillance tool (eDNA) developed under the stewardship of the Invasive Animal CRC for early detection and mapping the distribution of tilapia, current management mechanisms are inadequate for control of tilapia once an incursion has occurred. Indeed, it is now clear that current education programs are failing to stop the spread and options for management post-incursion are extremely limited.

Thus, there is a need to research, develop and evaluate potential tilapia control agents. Recently, the tilapia lake virus (TiLV) isolated from tilapia has caused widespread mortalities in Israel and Ecuador and since then has been reported in a number of other counties. This has raised hopes of the potential for tilapia biocontrol, however, prior to significant research investment in assessing this particular agent, it is prudent to evaluate tilapia pathogens in the context of biocontrol more broadly. Thus, this project proposes to conduct a review of tilapia pathogens and assess their potential as biocontrol agents.

Status

In progress

Objectives

  1. Desktop review of tilapia pathogens, where they will be listed, ranked. With the specific objective to provide an assessment of biocontrol options (including TiLV) for Mozambique tilapia ( mossambicus) and spotted tilapia (T. mariae).
  2. Benefit-cost analysis of tilapia biocontrol.
  3. Business case for investing in the research (e.g. target susceptibility and specificity) necessary to gain approval for the release of an agent.
  4. Develop capability to work with potential biocontrol agents for tilapia in Australia.
  5. Determine the susceptibility of two tilapias species present in Australian waterways ( mossambicus and T. mariae) to TiLV and demonstrate the efficacy of TiLV as a potential biocontrol agent for tilapia in Australia.

Project Leader



Dr Agus Sunarto
Project Team
  • Agus Sunarto, CSIRO
  • Ellen Ariel, JCU
  • Bonnie Holmes, USC
Project Partners
  • CSIRO
  • QDAF
  • JCU
  • USC

The project receives funding from the Australian Government Department of Agriculture, Water and Environment

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