ANALYSIS OF THE IMPACT OF STOATS, MUSTELA ERMINEA, ON NORTHERN BROWN KIWI,APTERYX MANTELLI, IN NEW ZEALAND

摘要: An age-structured population analysis is used to determine recruitment levels and a condition for survival which can assist management decisions hence improve the viability of populations northern brown kiwi, Apteryx mantelli, in forests on New Zealand mainland. Currently, absence predator control, rates are less than 5% due high stoat, Mustela erminea, predation juvenile kiwi. Predation adult kiwi very low. The predicts that rate 19% required maintain stability. To achieve this target, stoat have be reduced by about 80% some years, maintained at critical residual density estimated value two animals per square kilometre up nine months until immature reach safe size 1200 g (50% their weight). Recent predator-control initiatives indicate numbers low relatively small areas mainland forest (up 1000 ha). techniques needed protect over larger areas.