Not all of the fish we release right after we catch them survive either. Shoot, quite a few that I catch over the year never make it back in the water. Granted a lot more swim away but I'm sure they don't all survive. You could look at it in another way, if all the fish were killed during tournaments like they used to be, there would be even fewer fish than now, so while a few do die, more survive to be caught again. good fishin
chimo