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10 May 2023

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NIWA can help you leverage updated climate projections

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29 August 2024

NIWA is using updated climate projections to help New Zealanders better understand climate-related risks.
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Tonga eruption confirmed as largest ever recorded

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21 November 2022

A New Zealand-led team has completed the fullest investigation to date into January’s eruption of the underwater Tongan volcano.
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Ross Sea “ACTUATE” Voyage 2025

RV Tangaroa voyage to the Ross Sea, the ship’s 16th voyage to Antarctica and Southern Ocean.
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Education Resource

06 February 2023

Downloadable and printable guides on identification of common freshwater invertebrates found in New Zealand waterways and lakes.
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Te Kūwaha Graduate Programme

19 January 2023

NIWA’s Te Kūwaha Graduate Internship programme has been established to help support and create tangible pathways for the next generation of Māori researchers.
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06 June 2017

A monthly summary of the climate in the tropical South Pacific islands, with an outlook for the coming months.

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Tuna/Eels

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Tuna/Eels

Images from the Tuna Information Resource.

http://www.niwa.co.nz/te-kuwaha/tuna-information-resource

Migrant shortfin male that has been unable to migrate downstream due to the presence of a large in-stream structure
Fish ladders
Elver ramp materials
Piripaua Power Station fish ladder
Nature-like fishway at Mōkauiti Dam
The components of the Southern Plateau food web and the connections between them.
Karāpiro Dam fish lift in a semi-raised position
Mararoa Weir fish pass, Waiau River
New sponge poster at Kelly Tarlton's
Barrier net deployed across the Aniwhenua Canal
Using a backpack electric fishing machine (EFM300) to sample the Utakura River
Baited Gee Minnow Traps ready for deployment
Step-by-step guide to help determine the sex of tuna
Shortfin female eel from Lake Ōmāpere, showing ovaries
Te Roopū Taiao o Utakura and NIWA staff sampling tuna from the Lake Ōmāpere catchment to analyse for heavy metals
Te Roopū Taiao o Utakura, Te Roopū Whariki and NIWA tuna and water quality training workshop
Sampling with an electric fishing machine - Waikirikiri Stream, Utakura River
Measuring the length of a shortfin tuna - Lake Ōmāpere
Baiting fyke nets with catfood pouches during a tuna survey - Lake Ōmāpere
Measuring a large longfin female caught in the Utakura River

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