"Despite it being really difficult to get near them, we were able to attach tracking devices to two whales which, on reflection was really good. We thought at first we weren't going to get any instruments deployed at all," Ms Goetz said.
The tracking devices, which should last for four to six months, show both whales are now heading north, with one bypassing the Taranaki region.
"We have no idea where these animals are heading but the tags are transmitting well and it has all been worth it," Dr Goetz said.
"This will give us novel information as it is the first movement data for this species in New Zealand waters which is very exciting."
The NIWA research expedition was also supported by OMV, University of Auckland, the Australian Antarctic Division, Western Work Boats, Oregon State University and the Pew Charitable Trust.
- NZN