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2020 - Hoki eggs survey
VoyageHoki is New Zealand's largest finfish fishery. During this voyage, hoki eggs reveal a few secrets that surprise scientists. -
Scientists spy on baby snapper in Hauraki Gulf
News article06 November 2018NIWA researchers are out on the Hauraki Gulf this week to find out more about the nurseries of young snapper. -
Pelagic shark risk assessments
Research ProjectNIWA has developed a new method for spatially-explicit, quantitative, sustainability risk assessment of pelagic shark population. -
Shortfin mako sharks
Research ProjectSharks are vulnerable to overfishing because of their low reproductive rates and often low growth rates. Most pelagic sharks fall near the middle of the shark productivity scale, and there is concern that catching too many of them could lead to population depletion. In New Zealand waters, mako sharks are the second most commonly caught shark species (after blue sharks) on tuna longlines. -
Population modelling software
Casal2 is an advanced software package developed by NIWA for modelling the population dynamics of marine species. -
CASAL
CASAL is an advanced software package developed by NIWA for fish stock assessment. -
Determining the age of fish
Research ProjectNIWA expends considerable effort on determining the age of commercial fish species. But why age a fish? And how do we do it? -
Fisheries stock assessments
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.