Fish

Fish Passage Assessment Tool

The Fish Passage Assessment Tool has been developed to provide an easy to use, practical tool for recording instream structures and assessing their likely impact on fish movements and river connectivity.

NIWA undertakes an ambitious, complex seabed experiment

Media Release
7 May 2018
One of the most challenging scientific underwater experiments ever attempted by NIWA is taking place this month on the Chatham Rise.

Improving Tonga’s deepwater demersal line fishery

NIWA is in its third year of a 5-year phased project on the deepwater line fishery in Tonga funded by the NZ Aid Programme’s Partnership for International Development Fund. The aim of the project is to deliver the improved governance, management, and economic and biological sustainability of the fishery focusing on deepwater snapper and bluenose in the Tonga EEZ.

New Zealand fish passage guidelines

The New Zealand Fish Passage Guidelines sets out recommended practice for the design of instream infrastructure to provide for fish passage.

Blog: The inhabitants of the twilight zone of the open-ocean - 15 March

15 March 2018

Think about a futuristic world where at night time, people use different kind of self-propelled vehicles to hover across cities, illuminating the skies with different colours and shapes, while transiting around them.

NIWA expertise contributes to healthy hoki fishery

Media Release
28 February 2018
When NIWA fisheries scientist Richard O’Driscoll went to sea earlier this year, he and his team measured so many fish that laid end to end, they would have stretched for 31km.

Scientists send snapper to boot camp

Media Release
19 February 2018
At a laboratory just outside Whangarei, scientists are putting very young snapper through comprehensive physical testing - including a full medical check-up involving smell, hearing, vision, and even anxiety testing.

Hoki Survey, Chatham Rise Jan - Feb 2018

NIWA research ship Tangaroa has been chartered by the Ministry of Primary Industries to survey the Hoki fishery on the Chatham Rise during January and early February 2018.

Summer series 2017 - One fish, two fish…we're counting on you

Feature story
26 December 2017
“You almost become a fishing psychologist – you can tell by the way people walk up the ramp to get their trailer if they’ve had a good day.”

Warming ocean to alter ecosystems and affect fisheries by end of century, says NIWA scientists

Feature story
5 December 2017
Rapid warming of the ocean near Tasmania may provide a good indication of how the water around New Zealand will change as the planet warms, say NIWA scientists.

New science on inanga

The inward migrations of inanga (Galaxias maculatus) post-larvae back to freshwaters occur primarily in late winter and spring time where they are targeted as part of the whitebait fishery. In this study, we shed light on the relationships between growth attained in pelagic and freshwater environments.

Aquatic invertebrate traits database

Approximately 500 Aquatic invertebrate taxa are described in this database, made available to assist with the identification of specimens.

Double trouble from oyster pathogens

Feature story
8 October 2017
The spread of Bonamia ostreae from Marlborough Sounds to oyster farms in Big Glory Bay (Stewart Island) could spread to the valuable wild oyster population.

Revealing toothfish secrets

Feature story
5 October 2017
The Ross Sea Marine Protected Area (MPA) in the Southern Ocean will help further research into the ecology of Antarctic toothfish.

Scientist makes new homes for baby paua

Media Release
15 August 2017
Twelve bespoke concrete structures resembling "upside down oven trays" may hold the key to restoring the paua population off Kaikoura wiped out by last November's earthquake.

Hapū joins forces with NIWA in tuna research

Feature story
20 June 2017
Local hapū and NIWA are working together to find out more about juvenile freshwater eels or tuna in streams connecting to the Wairua River in the Wairoa catchment in Northland.

Questions and answers about oyster disease Bonamia ostreae

Media Release
14 June 2017
NIWA is today issuing some scientific information on the parasite Bonamia ostreae, recently discovered in Big Glory Bay, Stewart Island, and the risk it poses to the Bluff oyster fishery.

Paradise for eels? Getting to know the secrets of NZ's new icon

Feature story
9 May 2017

As New Zealand's "Mr Eel", Niwa's Dr Don Jellyman has heard every tall tale. And some of them may be true.

Ecosystem monitoring

The role of toothfish in the ecosystem.

Inputs into stock assessment

Inputs into stock assessment

International fisheries scientists meeting in Nelson

Media Release
30 March 2017

Scientists from around the globe are meeting in Nelson next week to discuss the latest advances in fisheries technology.

NIWA research vessel surveying fish in Tasman and Golden Bays

Media Release
22 March 2017

Boaties in Tasman and Golden Bays are likely to notice a larger than usual vessel working close to shore over the next few days.

World-leading climate change research at Bream Bay

23 February 2017
The effects of climate change on fish are being studied in a world-first trial at NIWA’s Bream Bay marine science centre.

Scientists find new species during Kermadecs research voyage

Media Release
14 February 2017
A voyage to the Kermadec Islands has resulted in the discovery of many species either new to science or not previously found in the area.
Exploring the deepsea

Exploring the deepsea

Despite many centuries of maritime exploration, only a fraction of our planet's seafloor has been observed. NIWA Deepsea Scientist Di Tracey tells us what it feels like to probe deep beneath the waves to see what's living on the ocean floor.

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