"just like any tournament world-wide"
Not quite Jesse! Fish tournaments are run as species specific. Billfish, Wahoo, Tuna etc.
The methods used are for the most part lure/bait trolling.These specific species require a fast moving ( sometimes up to 12knots)trolled bait.Sharks are not prone to strike at baits moving fast through the water.therefore the chance of picking up a shark of any size is almost eliminated. It can happen but with very rare chance.
Shark fishing, on the other hand ,is a Chum based method and slow to no moving bait. A shark is a opertunity eater and not prone to chase bait for a meal.If this tournament is in fact one that is targeting Deep sea pelagics it is unlikly for a boat to bring in shark unless they were specificly targeted.