March 2010
This report describes the results of ongoing population monitoring of New Zealand sea lions at the Auckland islands. This is the final report for the 2009/10 year.


This progress report outlines key findings from the 2009/10 New Zealand sea lion research field trip to the Auckland Islands. A manuscript containing detailed methods and full findings, including work undertaken for this project during 2008/09 and 2007/09, will be produced at a later date.

This work continues annual surveys of the Auckland Island breeding sites of the New Zealand sea lions (Phocarctos hookeri).

The objectives of the project were:

  • To collect field data that will allow quantification and estimation of: 
    • pup production
    • survival of previously marked New Zealand sea lions
    • reproduction by known-age female New Zealand sea lions
  • To maintain and update the New Zealand sea lion database
  • To make available field data for relevant modelling work, and
  • To characterise at-sea distribution of poorly known age and sex classes of New Zealand sea lions.

Publication information

Prepared by Dr. Louise Chilvers, Department of Conservation


Conservation Services Programme
Department of Conservation
PO Box 10-420
Wellington 6143


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