Dear Editor:

Just so people know, rotenone is not a "selective treatment" for invasive species of fish as stated in the subject piece, which can be read at http://www.grantcountybeat.com/news/news-releases/40049-temporary-closure-order-native-fish-restoration-activity-for-catwalk-recreation-area .

Rotenone kills fish, period, whether native, non-native, or invasive. Rotenone also affects other gill-breathing organisms such as immature amphibians and immature forms of aquatic insects. Working as a fishery biologist for the California Department of Fish and Game between 1960 and 1971, and the U.S. Fish and Wildlife Service, from 1971 through 1979, I was involved in many rotenone applications. I'm a little surprised that rotenone and potassium permanganate are still being used.

Roger Lanse

Silver City