Chain Pickerel is a freshwater fish that is a member of the pike family. Chain Pickerels are found along the Eastern coast of Florida all the way around to Texas. Sometimes called a "jack fish" or a "southern pike," pickerel feed mainly on smaller fish, ambushing them with sharp teeth. These fish are often found throughout the state of Florida in rivers, lakes and creeks. Spawning occurs in late winter to spring among heavy aquatic weed growth or flooded grasses, in water from a few inches deep to several feet deep. Large number of adhesive eggs are scattered over vegetation. Based on this information, which of the following scenarios would impact the population of Chain Pickerel and cause a decrease in the population size?