Conservation Minister Nick Smith says there is no evidence to suggest Maui's dolphins need further protection over and above the measures currently in place.
The International Whaling Commission said the Government must take immediate steps to protect the critically endangered mammals but Dr Smith told Morning Report he will not be taking that advice.
Dr Smith said he does not accept that not enough is being done.
"Set-netting is the biggest risk, we've banned it where the Maui's dolphin exists and I simply challenge the International Whaling Commission and others .. show us the Maui."
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