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Tuna - life cycle and leptocephalii
Freshwater eels have an unusual life cycle which sees them travelling between the ocean, estuaries and freshwaters. -
Hydro
Hydro-electricity is a renewable energy source that relies on the inflow of water into storage lakes upstream of a dam. -
The impact of El Niño and La Niña on New Zealand's climate
El Niño accounts for less than 25 percent of the year-to year variance in seasonal rainfall and temperature at most locations in New Zealand. -
Mitigation and best practice options
Some simple steps to minimise the effects of mining activities on water quality and mahinga kai. -
Stepping into the river
Feature story06 June 2017NIWA discusses, in depth, this year's most asked question—what is happening to our fresh waterways? -
Kākahi
The kākahi or freshwater mussel was a valuable mahinga kai resource for many Māori. -
Climate Change Vulnerability Assessment (CCVA)
ServiceTo prepare for changes in climate, our freshwater and oceans decision-makers need information on species vulnerability to climate change. -
What is Kaitiaki Tools?
Kaitiaki Tools is a guide to teach people (especially hapū and iwi groups) who manage the resource consent process. -
Causes of sedimentation
What are the potential sources of sediments from land use activities? -
Tuna - habitat
Tuna are found in all sorts of habitats (places), including coastal estuaries, lakes, wetlands, rivers, mountain streams and even alpine tarns.
