The northern snakehead has become a widespread invader in the United States. Due to this species’ ability to survive and thrive in many different environments, control efforts for this species must implemented. Poison is one of the various methods being explored. In laboratory testing, several different concentrations proved lethal to the snakehead . Lazur et. al determined that the smallest lethal dose was 0.075mg/L of rotenone, a commonly used aquatic poison. Such a dose killed all test subjects within 1 hour of administration, and proved incredibly effective in a pond setting in Crofton, MD as 8 adult and 834 juvenile snakeheads were recovered. These results demonstrate a susceptibility of this species to known control methods. However, all other aquatic fauna in the affected region succumbed to the poison as well. Additionally, the affected area remained toxic for at least one week after treatment. It is suggested that this method only be utilized in clearly defined and isolated areas.
(North American Journal of Fisheries Management 2006; 26: 628-630)