Well lets see if we cam mathematically predict the catch rate
Pania SC has just completed its 10 round twilight series in which those members in attendance fished 3 hours at a time for 10 wednesday evenings.
Twenty six Kahawai were caught over the ten evenings, and that works out to about 300 fishing-hours for 26 fish, or about 11.5 fishing-hours per fish.

Now, if 450 people fish the kahawai comp for 6.5 hours that will give a total of 2925 fishing-hours.
At a catch rate of 11.5 fishing-hours per fish we should have 254 kahawai weighed.............

Where's my Tui blackboard.....