Research

Māui dolphins, a subspecies of Hector’s dolphins, are listed as nationally critical in New Zealand with a population estimate between 57 and 75 dolphins over one year old.

Biological traits analysis is a valuable tool for measuring ecosystem function.

Temperature trends from 1930s to present day

The New Zealand Fish Passage Guidelines sets out recommended practice for the design of instream infrastructure to provide for fish passage.

This collaborative NZaid project worked with coastal Fijian villagers at Votua on the Coral Coast of Viti Levu to develop pragmatic water supply and waste treatment solutions to protect public health and reduce contamination of coastal waters.

Where and when do white sharks occur in New Zealand waters, and how can fisheries bycatch be reduced?

A range of physical and chemical variables are measured in the NRWQN.

NIWA expends considerable effort on determining the age of commercial fish species. But why age a fish? And how do we do it?

Understanding how hazards impact people and the environment provides the foundation for informed decision making for a resilient Pacific

Projections of how climate change is likely to affect New Zealand.

Maps of average annual rainfall, temperature and other climate variables have been produced for all of New Zealand, based on the period 1981–2010.

There are many lines of evidence showing that NZ has warmed during the past century.