Many prey species alter their behavior and/or morphology in response to exudates from predators and injured con- or heterospecifics to alleviate predation risk. Yet. few studies have assessed the effectiveness of risk aversion in prey in terms of decreasing mortality. Recent studies have shown that eastern oysters Crassostrea virginica produce heavier shells in the presence of predators. https://www.roneverhart.com/Jaakaapin-raikastin-Fummom-InnovaGoods/