Distribution of Sooty Shearwater ( Puffinus griseus ) breeding colonies along the Otago Coast, New Zealand, with indication of countrywide population trends
|Title||Distribution of Sooty Shearwater ( Puffinus griseus ) breeding colonies along the Otago Coast, New Zealand, with indication of countrywide population trends|
|Publication Type||Journal Article|
|Year of Publication||1997|
|Authors||Hamilton, SA, Moller, H, Robertson, CJR|
|Type of Article||paper|
|Keywords||distribution, islands, population abundance, Puffinus griseus, Sooty Shearwater|
Large breeding colonies of Sooty Shearwaters or Titi (Puffinus griseus) occur on offshore islands around New Zealand and several smaller colonies occur on headlands and near-shore islands around southern New Zealand; their population trends are unknown. Twelve mainland colonies around Otago had between 11 and 620 burrows in the 1992/93 breeding season. The largest of three near-shore island colonies in Otago had at least 1,050 burrows. Sooty Shearwater burrows have been recorded from 39 mainland sites in the South Island, but only 11 (28%) of these have been checked in the last 40 years: many may now be extinct. OSNZ Beach Patrol data suggest that the overall number of Sooty Shearwaters has changed little over a 26 year period. Methods for monitoring Sooty Shearwater colonies need to be standardised to evaluate population trends in the future.