Shadow Agriculture, Food and Fisheries Minister Adrian Pederick said commercial fisherman were deeply concerned about the implications of the proposed marine parks legislation, which would affect access to their fishing grounds.

Mr Pederick said the Displaced Effort Working Group (DEWG), which was established in 2007 to help deal with the effects of displaced commercial fishing arising from marine parks, had passed its recommendations to the government in May, but no decision had been made.

"The government gave a commitment to the industry that a compensation package would be settled before the marine park zoning proposals were released for public consultation," he said.

"SA's commercial fishing fraternity have hundreds of millions of dollars invested in their industry on which their livelihoods depend."

South Australian Sardine Industry Association chief executive Christian Pyke said marine park processes created a degree of uncertainty for people involved in the seafood industry because the process would result in a clear loss of access to the fish resources.

"It is extremely alarming that (Environment and Conservation) minister (Paul) Caica is delaying the adoption of compensation arrangements that are designed to provide fair and reasonable compensation for impacted seafood businesses," he said.

"It is standard practice in conservation related decision making that affected resource users are offered an acceptable degree of certainty.

"Minister Caica seems reluctant to provide certainty through the implementation of agreed compensation provisions.

"This is contrary to national guidelines that recognise that compensation is an issue that must be resolved when developing marine parks and State legislation that requires the minister to compensate displaced fishers."

Minister Caica said while he had received advice from the working group, further work needed to be done to ensure the best outcome for all parties.