Skip to main content
padlock icon - secure page this page is secure

Inferring Vulnerability to Introduced Predators without Experimental Demonstration: Case Study of Suter's Skink in New Zealand

Buy Article:

$52.00 + tax (Refund Policy)

Abstract:

The coast-inhabiting Suter's skink ( Oligosoma suteri ) has a fragmented distribution on islands around northern New Zealand, which has been attributed to the effects of introduced predators. We used classification trees to assess a range of factors that might influence the distribution of Suter's skinks. We then assessed the vulnerability to predation of juvenile and adult Suter's skinks by using a population viability analysis ( PVA ) model. We tested predictions from the classification tree and PVA models on two islands from which introduced Pacific rats (  Rattus exulans ) were removed. On one island, Suter's skinks were reintroduced ( assuming previous extirpation by rats ), and on the other the skinks had survived in the presence of Pacific rats. Our results revealed that populations of Suter's skinks are likely to be susceptible to predation where there are no bouldery beaches as refuges. Where these beaches are present, they are likely to function as refuges only if there is effective protection for adults. We conclude, however, that despite some apparently compelling circumstantial evidence of the effects of introduced predators on New Zealand lizards, it appears impractical to verify cause and effect with field manipulations if lizards and introduced predators do not already coexist.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Document Type: Research Article

Affiliations: 1: Science and Research Unit  , Department of Conservation, Private Bag 68–908, Newton, Auckland, New Zealand, 2: Whangarei Area  , Department of Conservation, P.O. Box 147, Whangarei, New Zealand 3: Science and Research Unit  , Department of Conservation, Private Bag 4715, Christchurch, New Zealand

Publication date: October 1, 2003

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more