A few months ago I picked up this book, Four Fish, by Paul Greenberg. I don't eat much fish so it was just an idle curiosity about fish, fishing and the fish "industry". Plus, I had heard all these cautions about farmed fish.
But, as I was reading along, I had a sudden ah-ha moment. The reason I don't like to eat tuna in a can anymore is that light chunk tuna is no longer "chunk". The cans are smaller, and what passes for chunk these days is what was labeled as "flake" back when. Professional homemakers used to say that flake tuna was alright for tuna salad since you were going to break it up when you stirred in the mayonnaise anyway. But my mom and grandmother, in fact none of the women I knew would ever buy flake tuna. It was always chunk light for us! I am talking the 1970s and prior. Maybe into the 80s, but honestly I don't remember when tuna became either flake tuna or solid white. Solid white is flavorless, IMO, and with a texture of fish that's overcooked. I eat it but I b*tch about it.
The problem is of course, people. We have fished for tuna so much that the actual fish are harder to find, and they are smaller, too. So the cans are smaller and the cans have a higher portion of liquid to tuna. I remember squeezing out the oil with the lid and having more than half a can of meat left. No more.
I really miss tuna, but I do understand that with as many people who also love it, we have got to let the tuna reproduce and grow some or we won't have any.