Freshwater

Some simple steps to minimise the effects of aquaculture activities on water quality and mahinga kai.

How may the activities of the mining industry influence water resources?

Learn how to use the New Zealand Freshwater Fish Database (NZFFD)

Find out more about our water quality tools.

We have prepared a breakdown of the different guidelines that are available for sampling freshwater fisheries. The overview provides links to key documents that explain what should be considered when designing fish monitoring studies and how to implement the various sampling techniques.

This national GIS ‘layer’ enables reconnaissance-scale estimation of suspended-sediment yields from New Zealand’s rivers and streams. It has been developed by NIWA in collaboration with Landcare Research.

Find out more about free floating species.

NIWA is leading a new six-year research project that seeks to increase our understanding of piharau/kanakana/lamprey, using Mātauranga Māori, social science and biophysical science approaches.

Submerged plants have a number of advantages that favour their use as indicators of lake ecological condition.

NIWA has developed a powerful software tool for the analysis of water quality data.

A high proportion of New Zealand’s native freshwater fish fauna need to migrate to and from the sea.

Piharau/kanakana are an important mahinga kai species and a prized delicacy for many Māori.