A couple of weeks ago I went on a mackerel fishing trip out of St. Petersburg, Florida, with a 35-year commercial fishing veteran. It was a beautiful day and there was the slightest tinge of autumn out on the Gulf of Mexico, and we quickly caught the day’s order of Spanish and King mackerel. Heading back through John’s Pass I asked my friend, who also fishes for Gulf snapper and grouper, how business has been and without missing a beat he said “The last two years have been the best of my career.”
In elementary school, we learned through basic math that 1 + 1 = 2 and 2 x 2 = 4. As we grew up, math became more complicated with different variables and formulas, but we always knew that 1 + 1 = 2 and 2 x 2 = 4. Fisheries math is not all that different.
Each year, scientists at the National Oceanic and Atmospheric Administration use fishery math and science to determine how many fish can be removed from fisheries in a sustainable manner, and the number of fish that can be removed is called the annual catch limit (ACL). If species fall below a level that is sustainable, managers put in a rebuilding plan – a roadmap to rebuild the stock to a healthy level.