ARLINGTON, Va. (AP) -- An environmental group is calling on Congress to fund research of intersex fish in the Potomac River.
The State Journal in Charleston, West Virginia reports that the Potomac Conservancy gave a petition to Virginia Rep. James P. Moran last week containing more than 5,000 signatures.
The petition seeks funding for a three-year study to determine the causes of intersex fish. It also proposes a study of the effects of endocrine disrupting compounds on human health.
The petition is part of the conservancy's "Fish Mystery" campaign to draw attention to the problem.
A 2008 study found as many as 77 percent of male smallmouth bass in the South Branch of the Potomac had started to produce eggs.