That would be a way to detect dopers, no?
http://www.baltimoresun.com/news/maryland/bs-md-white-marlin-open-order-20170615-story.htmlhttp://www.delmarvanow.com/story/sports/2017/06/14/judge-rules-against-white-marlin-open-winner/397345001/Heasley and his teammates won the tournament after catching a 76.5-pound white marlin but failed the two polygraph tests required under tournament rules.
Polygraph tests are required in most open-fishing competitions to verify that large prizes are won fairly and are often conducted by private investigators.
Officials say he violated the rules of the tournament for catching the fish before the time contestants were allowed to catch fish, at 8:30 a.m. on August 9, 2016, and lied about it in the polygraph. The tournament organizers made the decision to withhold his prize as a result.