The limitations of using kiore (Rattus exulans) diet-sampling to determinewoodrose (Dactylanthus taylori, Balanophoraceae) distribution on Hauturu (Little Barrier Island), New Zealand

We tested the use of a vertebrate diet-sampling technique to assess its sui tability for determining woodrose (Dactylanthus taylorii) distribution on H auturu (Little Barrier Island). Kiore (Rattus exulans) is the only suitable vertebrate occurring on the island. Populations of kiore varied between th ree years of comparison and were not predictable during flowering periods o f D. taylorii. Stains of presumed D. taylorii colouring, were recorded in g uts, but no confirmed D. taylorii bracts or flowers were recorded. Furtherm ore, no signs of D. taylorii were recorded in the gut of an animal six hour s after it was observed eating a D. taylorii specimen. We concluded that th e technique has limited application with kiore as a sampling animal.