Rede, that's a very eye-opening chart. If those guys are taking little wee tuna, 3.2 kg, the fish don't stand a chance of procreating. The lures that we use around here will only attract bites from fish weighing 15 lbs. and up. The dark red flesh of the Bigeye is excellent as sushi, the Japanese go crazy for it.

I doubt that Climatic change affects the Bigeye, they're very deep swimming fish.