Ronald Reagan celebrated his coming unopposed victories in Tuesday's primaries by denouncing the Carter administration and promising to establish a friendly relationship with American business if he becomes president.

"I would like to make government a friend of the American industrial community, not an enemy, and today I think it has a hostile, adversary relationship with the very people it is supposed to be supporting and protecting," Reagan said.

The former California governor made his pro-business declaration to an enthusiastic crowd of tuna boat owners and fishermen at dockside here. Many of the boat owners have long expressed the view that federal environmental regulations on the types of nets they use will put them out of business.

The restrictions, designed to protect endangered propoises, instead are making the American tuna fishermen "an endangered species," Reagan said.

Reagan then delivered his standard antigovernment speech from a platform aboard the tuna boat Gann Discoverer, which was recently converted to Mexican registry in an effort to escape U.S. environmentally regulations and obtain the advantage of lower Mexican operating costs.

The boat owner, Ed Gann, introduced Reagan as a friend of the industry and said that in the White House he would be supportive of the fishermen.

Continuing to develop the themes of his fall campaign against the Carter administration, Reagan sounded, a partisan note by saying that the Republican Party could save the United States from a continuing drift to federal regulations.

"It's time for the Republican Party to come to the rescue of this country," Reagan said.

Reagan continued his campaign later today in San Jose and Anaheim, where the GOP had organized a rally designed to tap Reagan's successful clinching of the party's presidential nomination.

In San Diego, Reagan was heckled as he had been in a similar appearance here 10 days ago, by members of an organization that calls itself the Communist Workers Party. They interrupted Reagan's speech with shouted denunciations of big oil companies and cries that American politicians, including Reagan, had broken their promises.

Reagan was good-natured about the heckling, winning the applause of the crowd when he said that United States was "one of the few countries left where somebody can do something like this and not be thrown in jail."

But the crowd jostled and shoved the hecklers, forcing them to the back of the audience.

Later, in San Jose, where Sen. Edward M. Kennedy (D-Mass.) was due to campaign, someone in the audience shouted to reagan, "I want Teddy."

"There's a fella back there who wants Teddy -- he's sick," Reagan responded.

But at an evening reception in Anaheim, at least one Kennedy Democrat was favorably disposed toward Reagan. He was 72-year-old James Roosevelt, the son of Franklin D. Roosevelt, who said he expects to be a Kennedy delegate to the Democratic National Convention.

Roosevelt said he wasn't endorsing anyone but called Reagan "a very fine man." Subsequently, he was introduced to the audience which applauded.