I feel like harvesting older ones can be better than harvesting young ones (except in ponds). Old ones have already spawned several times, they aren’t the future. Old fish are close to dying, might as well eat em. If you think about it, almost every state has length minimums, meaning you keep big fish. If keeping only small fish was better for the ecosystem, you would think biologists would make length maximums instead of minimums. I’ve seen a few length maximums across the country but not many. I think we as fishermen let big fish go because we love them and don’t want to kill them, not because it’s good for the ecosystem. Also in hunting, most harvest mature animals