The study indicates that harvesting bass by hook and line only culls the most aggressive fish from the system. If we continually harvest by angling, we leave behind the hook-shy fish. When the fishery gets to a certain point, all we have left are hook-shy bass, and when they breed, the study suggests that trait is carried on in the offspring. Since the study suggests this is an inherited trait, new stock can't 'learn' from existing stock.
