The authors apologise for an error in Fig. 5A on p. 348 of the above paper, in which the February 1998 image is incorrect. Please find the correct Fig. 5A printed on the next page of the current issue.
New Zealand Journal of Marine and Freshwater Research, 2001, Vol. 35: 647-648
0028-8330/01/3503-0647 $7.00 (c) The Royal Society of New Zealand 2001
PDF file of entire paper: medium quality (548K); (scanned from paper original: notes about this process)