0 Barrows, Maynard B. 1939 Journal of Wildlife Management 3 131-133 April, 1939 animal studies, ecology, environmental impact, extermination, fish, Goose Lake, habitat, lakes and ponds, management, natural resource management, poisons, population control, wildlife health, yellow perch, Perca flacescens, general wildlife health studie For a number of years officials of the National Park Service have realized that the Yellow Perch (Perca flavescens) in Goose Lake of Yellowstone National Park were a potential threat to other waters which they might be either intentionally or accidentally transferred, and, further, that they were serving no good purpose as they were undersized and furnished little or no sport for fishermen. In 1936 a hydrographic survey of the lake and means of eliminating the perch were considered. It was decided that using derris root would be the best as aquatic vegetation would not be killed and insect life would suffer less than if chlorine or copper sulfate were used. This article describes how derris root was decided upon and the methods employed for carrying its use. Found at Yellowstone Research Library and online, pdf on computerNatureBib ID: 38697 http://www.jstor.org/cgi-bin/jstor/printpage/0022541x/ap070008/07a00080/0.pdf?backcontext=page&dowhat=Acrobat&config=jstor&userID=a55385f8@doi.gov/01c0a8487200506ae48&0.pdf