This paper by Murray Gregory, published in the
Journal of the Royal Society of New
Zealand (1991) is a survey of plastic littler
and debris on New Zealand beaches (PDF, 2.9
MB).
On the Ministry for the Environment website,
this 1997 report – The state of New Zealand’s
environment – includes chapters on environmental
management and the state of New Zealand waters.
More suggestions and sources
Andrew, Neil, and Malcolm Francis, eds. The
living reef: the ecology of New Zealand’s rocky
reefs. Nelson: Craig Potton, 2003.
Johnson, David. Hooked: the story of the New
Zealand fishing industry. Christchurch:
Hazard, 2004.
King, Carolyn, ed. The handbook of New
Zealand mammals. 2nd ed. Auckland: Oxford
University Press, 2005.