Māori have an extensive knowledge of the ecology of freshwater eels, and have maintained their customary fisheries for several centuries.

Hydrocarbons, although requiring increasingly responsible use, are still an essential part of our modern economy. NIWA has provided survey and consultancy services related to the exploration of offshore mineral resources for thirty years.

NIWA's seafood sector work comprises our fish, fisheries and aquaculture research and consultancy.

Information about past climate is obtained from piecing evidence together from various sources.

Temperature affects the number and type of animals and plants that live in a waterway.

This identification guide covers the common crustose coralline algae found in central New Zealand.

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The climate of Otago is perhaps the most diverse of any region in New Zealand.

Dissolved oxygen (DO) is a relative measure of the amount of oxygen (O2) dissolved in water.

Longfin eels are the largest and longest-lived fish in New Zealand's freshwaters, and where they are present they are the top predator.