Common carp cannot successfully reproduce in all lakes. In fact, their eggs and larvae can often survive only is shallow marshy areas that have few native fish, or in lakes that winterkill. Knowing the locations of carp nurseries within your system of lakes is of critical importance. We conduct trapnet surveys to determine which lakes or marshes function as carp nurseries. We also measure all fish caught during our trap net surveys. This is valuable to not only identify nursery lakes for young of year carp, but also to get an idea of the fish community in each location.