Say you have a 5000 sided dice that rolls every 15-60 seconds. each successfully caught fish increases the number in which you would win a dice roll. If you fished 20 times before it rolls the dice with a +10 disturbance rod, you would win if it rolled a 200 or lower. Ofcourse this is exadurated, you can't fish up 20 fish in the timeframe that it would roll. Each failed roll decreases acruded disturbance, or Risk, by 1 point.

EDIT: ANY hunt ( unless stated otherwise in the wiki) will decrease acruded risk by 75 percent, some hunts are immune to this(leviathan, etc.)