The union representing East Coast dockworkers has been hemorrhaging assets and members in the past two years, according to a new financial report. Yet the union’s president was paid twice as much as several labor leaders who head unions more than 30 times larger.

The union, the International Longshoremen’s Association, paid its president, John Bowers, $587,078 last year, according to the annual report that the union submitted to the federal government late last month. That made him one of the nation’s highest-paid union officials. Mr. Bowers’s son John Jr., a union vice president, was paid $292,440 last year, the report said.

The report is another indication of trouble for the union, which the federal government has sued in a civil racketeering lawsuit that is seeking to have a trustee take control of the union because of its longtime ties to organized crime.

Membership in the union, which represents dockworkers from Maine to Texas, dropped to 43,500 in 2006, from 59,000 two years earlier, according to the report. That 26 percent drop occurred even though the nation’s ports, including huge ones in Newark and Elizabeth, N.J., were handling record volumes.