Control of a stoat (Mustela erminea) population irruption to enhance mohua (Mohoua ochrocephala) breeding success in New Zealand

  • Published source details O'Donnell C.F.J., Dilks P.J. & Elliott G.P. (1996) Control of a stoat (Mustela erminea) population irruption to enhance mohua (Mohoua ochrocephala) breeding success in New Zealand. New Zealand Journal of Zoology, 23, 279-286.


This study is summarised as evidence for the following.

Action Category

Control predators not on islands for songbirds

Action Link
Bird Conservation
  1. Control predators not on islands for songbirds

    A replicated, controlled, paired sites study in Fiordland, New Zealand, in 1990-3 (O'Donnell et al. 1996) found that mohua (yellowhead) Mohoua ochrocephala nests produced significantly more chicks in a site where stoats Mustela erminea were trapped than in a site without trapping for the first breeding season (1990-1) (80% fledging success, 2.1 fledglings/breeding group for ten groups vs. 36%, 1.1 fledglings/breeding group for 14 groups). In subsequent years, as the stoat population fell, success increased in both areas and the difference between sites became non-significant (87-90% fledging success, 2.6-2.7 fledglings/breeding group for 19 groups at the trapped sites vs. 66-75%, 1.9-2.5 fledglings/breeding group for 15 groups at the untrapped site). A total of 62 stoats were removed from the trapped site in 1990-1.


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