UPDATE: The six dingoes found dead on Fraser Island have all showed signs consistent with poisoning.
National Parks Minister Steven Miles said the results of toxicology testing had not yet been received, but preliminary necropsy reports pointed to all of the animals suffering the same symptoms which led to their deaths.
"These symptoms were consistent with 1080 poisoning but we will not know for certain until the toxicology results are received," he said.
"The Queensland Parks and Wildlife Service will pursue all avenues in this investigation to establish just what has happened and who is behind these killings.
"Any individuals found to be involved can expect to be pursued to the maximum extent possible under the law."
Dr Miles said the carcasses of six dingoes were recovered from the Orchid Beach area of Fraser Island after reports of deceased dingoes were first received on Friday, 17 June 2016.
One of the animals had been buried in a shallow grave.
The maximum penalty for killing dingoes on a protected area is $353,400 or two years' in jail but in this case other penalties could potentially apply.
Scientific studies have shown that the population fluctuates seasonally between about 100 and 200 animals.
The use of 1080 bait is registered in Queensland for the control of wild dogs, feral pigs, rabbits and foxes.
EARLIER: Authorities have raised concerns dingoes are being baited on Fraser Island as reports emerge of six dead carcasses being found in suspicious circumstances over the course of the weekend.
The Queensland Parks and Wildlife Service is investigating the deaths which occurred around Orchid Beach on the Island's western side.
"Reports of deceased dingoes were first received on Friday and since then six dingo carcasses have been recovered in the area," a QPWS spokesman said,
"One of the animals had been buried in a shallow grave.
"The cause of death is still unknown but human intervention is suspected and deliberate baiting is considered to be a high possibility.
"Necropsies will be performed as a matter of urgency to determine the cause of death and rangers are continuing to search the area.
Environment Minister Dr Steven Miles said he was alarmed dingoes were apparently being deliberately targeted and killed.
"Dingoes are as much a part of Fraser Island as the world renowned sand dunes and crystal clear blue lakes," he said.
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