He said most of the people caught in the area were locals, which was even more disappointing, and there was clear evidence their actions were depleting resources for all, with paua the main target.
A local man was found in possession of 63 paua, only five of which were of legal size. Another local was found with 49 paua, with only two of legal size. The paua, the second man's diving gear and a quad bike were seized on the spot. Many others spoken to during the patrol received warnings and/or fines ranging from $250 to $500.
"MPI is serious about ensuring that people who break the rules face the appropriate penalties. We will not tolerate any level of offending," Mr Rudsdale said.
"Precious fisheries resources like paua need to be safeguarded to ensure their sustainability as a species, as well as for future generations."
In the past week, a number of Northland people appeared before the courts on fisheries offences.
Dwayne Rawiri was sentenced to five months home detention and 200 hours community work for gathering and selling paua. Karena Tetai was ordered to complete 100 hours community work and banned from fishing for three years for obstructing a fisheries officer.
Shane Wikaira was ordered to do 350 hours community work for possessing excess and undersized paua. All three were regulars at Kawerau and well-known to fisheries officers, he said.
"I think 350 hours community work is a fair chunk of people's time," he said.
"Many are not in a position to pay a fine."
MPI would continue to put people before the courts for breaching fisheries rules.
Mr Rudsdale said people looking for paua in the areas targeted are having to go further around the coast to get enough legal sized ones, showing how big an impact poaching is having.