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Invasive rodent eradication on islands.

Gregg Howald1, C Josh Donlan, Juan Pablo Galván

  • 1Island Conservation Canada, 680-220 Cambie Street, Vancouver, British Columbia, V6B 2M9, Canada.

Conservation Biology : the Journal of the Society for Conservation Biology
|September 22, 2007
PubMed
Summary
This summary is machine-generated.

Invasive rodent eradications are crucial for island biodiversity. While rodenticides like brodifacoum are effective, social acceptance and funding are key challenges for future conservation efforts.

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Area of Science:

  • Conservation Biology
  • Invasive Species Management
  • Island Ecology

Background:

  • Invasive mammals, particularly rodents, pose a significant threat to island biodiversity, causing extinctions and ecosystem disruption.
  • Rodent eradication techniques have advanced significantly over the past two decades, becoming a vital conservation tool.

Purpose of the Study:

  • To review the current state of invasive rodent eradications globally.
  • To identify strategies for enhancing the effectiveness of eradication campaigns.

Main Methods:

  • Literature review of published invasive rodent eradication projects worldwide.
  • Analysis of eradication success rates, methods used, and challenges encountered.

Main Results:

  • 332 successful rodent eradications documented across 284 islands, primarily using rodenticides (91% of area treated with brodifacoum).
  • Aerial broadcasting was the most common method for large-area treatments.
  • Nontarget poisoning of native vertebrates has occurred but populations typically recover; mitigation strategies exist.

Conclusions:

  • Island size is less of a limitation than social acceptance and funding for rodent eradications.
  • Successful large-scale campaigns require integration with community programs, biosecurity, and reinvasion response.
  • Land managers should prioritize eradications on smaller islands and seek expert consultation for complex projects.