The reports of poor catches did not surprise Mr Mikkelsen. He said it was traditionally a quiet time of the year for fishing in the Bay and far from the peak of the season.
"It is typical fishing for this time of the year."
The ministry was assisted in its fisheries work by uniformed volunteer officers who had all the authority of full-time staff except the power of arrest.
"Volunteers are out there doing the business and doing a great job," he said.
The ministry could call on 10 to 12 volunteers at any one time from Tauranga.
Mr Mikkelsen urged people to report any sightings of suspicious fishing activity on 0800-476-224. "We are really interested in black market fish - it is a trend. If it looks unusual, then we want to hear about it straight away."
It was illegal to sell fish that were caught by a recreational fisherman. Mr Mikkelsen said there had not been any recent cases and he wanted to keep it that way.