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Biological Invasions

, Volume 17, Issue 5, pp 1355–1369 | Cite as

Successful eradication of invasive vertebrates on Rangitoto and Motutapu Islands, New Zealand

  • Richard GriffithsEmail author
  • Fin Buchanan
  • Keith Broome
  • John Neilsen
  • Derek Brown
  • Michelle Weakley
Original Paper

Abstract

An eradication program conducted on Rangitoto and Motutapu islands in New Zealand successfully removed stoats (Mustela erminea), cats (Felis catus), hedgehogs (Erinaceus europaeus occidentalis), rabbits (Oryctolagus cuniculus), mice (Musmusculus) and three species of rat (Rattus, R. exulans and R. norvegicus) from an area of 3,842 ha. The project was significant because it was completed so close to Auckland, New Zealand’s largest city, but also, in contrast to many eradication projects, it targeted a suite of invasive mammals in a single operation. To achieve success and avoid conflict in the allocation of resources, target species were prioritized by likelihood of eradication success with resources allocated preferentially to species posing the greatest risk of failure and methods applied in a sequence that allowed each technique to capitalize on its predecessor. Consequences of applying this approach were increased operational efficiency, a shorter operation than planned and reduced project cost. When compared to other projects that targeted the same species but individually, we estimate the Rangitoto and Motutapu project to have cost less than 50 % of the total potential cost if each species had been removed in a discrete operation. Logistical efficiencies created by condensing several operations into one and the use of eradication and detection techniques that targeted multiple species are credited as having the greatest influence on the increased efficiencies observed.

Keywords

Rodent Cat Stoat Rabbit Hedgehog Secondary poisoning Second generation Anticoagulant 

Notes

Acknowledgments

We would like to thank all of those people and organizations that supported the Rangitoto and Motutapu IAS eradication. These include DOC, the Island Eradication Advisory Group, Auckland Regional Council, Motutapu Restoration Trust, Rangitoto Island Historic Conservation Trust, Rangitoto Island Bach Community Association, Ngai Tai, Ngati Paoa, Kawerau a Maki, Ngati Whatua, Fullers, Motutapu Outdoor Education Camp, Motutapu Farms Ltd, Environment Canterbury, NZ Rotary Club of Newmarket, Auckland Regional Public Health Service, Animal Control Products, Skywork Helicopters Ltd, Ports of Auckland, SeaLink Travel Group NZ Ltd and others. Without the support of these organizations and the staff and individuals that work for them the project would not have been the success it has been.

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Richard Griffiths
    • 1
    Email author
  • Fin Buchanan
    • 2
  • Keith Broome
    • 3
  • John Neilsen
    • 2
  • Derek Brown
    • 2
  • Michelle Weakley
    • 2
  1. 1.Island ConservationSanta CruzUSA
  2. 2.Department of ConservationAucklandNew Zealand
  3. 3.Department of ConservationHamiltonNew Zealand

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