8143 - Laserfiche WebLink

Home Browse Search

are also highly susceptible. However, studies have shown that such organisms are able to quickly re-populate an area when the toxicity ends. No long term or short term effects on population abundance, dominant species, or species diversity have been found. Snails, clams, and crayfish are not affected by rotenone levels used in fisheries management. Q. What would be the effect on gulls, ducks and other birds that might be using the water area? A. Birds have about the same range of susceptibility as mammals and are quite resistant to rotenone. In general, young birds are more susceptible than adults. There is no likelihood that birds would be affected by rotenone, even if applied at rates many times that used in fish control operations, because of the low toxicity, low intake, and low exposure. Q. Is rotenone likely to kill warm-blooded animals if they live around a treated pond? A. The maximum allowed application rate is 5 mg of formulation per liter of water. The amount of rotenone contained in such an application rate would be 0.25 mg/liter. Laboratory studies have shown that it would not be possible to consume enough treated water to acquire even a dose equal to the "no effect" level. A 22 pound dog (10 kg) would have to drink 33.6 pounds (4.2 gallons) of water. In addition to its rapid breakdown, the toxicity of rotenone to wildlife and humans is low and no poisoning of birds, mammals or humans would result. Q. If I wish to obtain more information about fishery uses of rotenone and its effects on the environment, where can I obtain such information? A. An excellent review of rotenone uses is provided in the Draft Programatic Environmental Impact Report entitled Rotenone Use for Fisheries Management. This document is dated April, 1985 and was published by the California Department of Fish and Game. California Dept. of Fish & Game Environmental Services Branch Pesticide Investigations Unit 1701 Nimbus Road, Suite F Rancho Cordova, CA 95670