The Queensland Government says no dolphins have been caught in shark nets during a trial of an acoustic alarm.
The manager of the Shark Control Program, Jeff Krause, says the new pingers will soon be installed in shark nets across the state.
"We began a trial in April this year where we put the F-70 pingers on six nets down at the Gold Coast and also two of the three nets at Rainbow Beach," he said.
"So far we haven't caught a dolphin in any of those nets with the F-70 pinger on ... so that's great news."
The State Government says the acoustic alarms, fitted to shark nets in 2010, have also seen a big reduction in the number of whales becoming entangled.
RESOURCE: ABC NEWS 22nd October, 2012