A brief digression:

Originally Posted By: Wolfman
...not a single Bigeye Tuna. We used to pull in close to 50 in a season.

A link re overfishing of Bigeye tuna -
http://www.bigmarinefish.com/bigeye_tuna.html

The chart (Fig 8) was created a few years ago, and shows a projection, coincidentally, to the present. From what you say, the dotted line (medium projection) was much too optimistic, and the lowest projection is what your local catches suggest.

"Time is what prevents everything from happening at once" - John Wheeler