Atmospheric analysis

The NIWA Biodiversity Memoirs are comprehensive, definitive, illustrated reference works that capture the rigorous, peer-reviewed scientific study of New Zealand’s distinctive marine fauna and flora.

New Zealand will feel the impacts of a ‘Very Strong’ El Niño event over spring and summer of 2026/27.

The standard six‑replicate eDNA design was set to give a robust, nationally consistent picture of stream fish communities.

By detecting these traces of DNA, eDNA can provide a picture of the fish community present in a waterway without the need to capture fish.

The fact sheets on this page introduce the species you're most likely to encounter in pastoral catchments across Aotearoa.

New Zealand has one of the most distinctive freshwater fish faunas in the world.

Hoping for a glimpse of the Matariki stars over the long weekend?

MERIT analysis

Earth Sciences New Zealand has confirmed that El Niño conditions have been reached in the tropical Pacific and are expected to strongly influence New Zealand’s weather into 2027.

Learn about the Resource Management Act, Resource Consents, and how to prepare a submission.

Effective fish screen facilities balance design principles to protect fish while maintaining reliable water supply.

Effective fish screen facilities adapt to ever-changing river conditions and fish populations.