Fisheries

Casal2 is an advanced software package developed by NIWA for modelling the population dynamics of marine species.

NIWA will be determining the impact of fisheries on the aquatic environment. This will inform an ecosystem-based approach to fisheries management and the development methods to mitigate this impact.

NIWA aims to develop and apply standardised methodologies to monitor and assess international fisheries outside the New Zealand EEZ and determine the environmental effects of fishing in these areas.

Nearly half of New Zealand’s river network is partially or fully inaccessible to migratory fish, a new study shows.

To get the most benefit from a fish stock in the long term, we need to maximise our yield without damaging the fish population we rely on.

As New Zealanders search for the summer sun, 38 researchers and crew will board RV Tangaroa tomorrow for a six-week science voyage deep into the waters of Antarctica.

The initial data on the survival rates of snapper that are caught and then released, suggests careful handling could help fishers save hundreds of thousands of fish per year.

NIWA proudly owns and operates RV Tangaroa, a 70 m Ice Class scientific platform.

From scallop beds to trawl nets, a little bit of data science can make a big difference. Melissa Bray explains.

The tiny ear bone of a fish holds a wealth of information. Gather enough and you get a snapshot of what’s happening beneath the waves. Stuart Mackay explains.

A fish has been caught in the same location that it was tagged, nearly 20 years ago to the day.

A fish has been caught in the same location that it was tagged, nearly 20 years ago to the day.