Weka and rat impact studies on the Titi Islands

Funding Body Ka Mate Nga Kiore Incorporated (Oikonos/US Command Oil Spill Trustee Council)
Total Contract Value $110,014
Start Date July 2005
End Date June 2007
Principal Investigators

Henrik Moller, Jamie Newman


Henrik Moller, Jamie Newman

Staff Involved Sam McKechnie

Brief Abstract

Our Kia Mau Te Titi Mo Ake Tonu Atu research team banded an adult breeding sooty shearwater that was subsequently drowned in the Command Oil spill in the San Francisco Bay in 1999.  The tanker owners were sued and a fund established for reparation payments. Our simulations suggested that around 14,000 adults were drowned by the spill, but it may have been as many as 32,000.  Certainly it was the species most impacted by the spill, so the case for cultural damages was compelling.  We wrote an application on behalf of the Rakiura Maori community for funds to eradicate rats and weka (introduced predators of titi eggs and chicks) from four titi breeding islands in order to repair the oil spill injury.  They were granted approximately NZ $620,000 for eradication, quarantine and monitoring island restoration following the project.  This subcontract established a set of BACI (‘Before-After-Control-Impact’) plots where titi density has been measured. Surges in titi abundance are expected from 2014, once the newly protected cohorts of chicks return to breed on those islands where weka and rats have been eradicated.