A study by NIWA shows almost half of our river network is inaccessible to migratory fish.
A further 36 percent could also be restricted but has not yet been assessed.
NIWA is now studying the swimming capabilities of native fish to try and come up with a solution.
Freshwater ecologist Dr. Paul Franklin joined Early Edition.
LISTEN ABOVE

Sean Fitzpatrick: Former All Black previews the third Greatest Rivalry test against the Springboks
05:53

Rawdon Christie: Real Estate Agent on the state of the property market, Cotality data showing prices fell by 0.4% in August
02:46

Full Show Podcast: 04 September 2026
34:43