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)Pm? <br />Q. How does it work? <br />A. Rotenone does not "suffocate" fish as was long <br />believed. Instead, it inhibits a biochemical process at <br />the cellular level making it impossible for fish to use <br />oxygen in the release of energy needed for body <br />processes. <br />Q. Is rotenone a selective pesticide? <br />A. Although rotenone has some toxicity to all oxygen <br />breathing animals, it is selective to fish at the <br />concentrations used by fishery biologists. In general, <br />most common aquatic invertebrates are less sensitive <br />than fish to rotenone but some of the zooplankton are <br />equally sensitive. Snails and clams are quite tolerant. <br />With respect to fish, trout and salmon are the most <br />sensitive, sunfish are less sensitive and catfish are the <br />most resistant. <br />Q. Why is rotenone so selective? <br />A. Fish, insects, birds and mammals have natural en- <br />zymes that will detoxify sub-lethal amounts of rote- <br />GIZZARD SHAD <br />WALLEYE , <br />`? <br />' <br />NORTHERN PIKE ¦ <br />? 1-$ <br />RAINBOW TROUT - <br />C0 <br />W CARP <br />U <br />d YELLOW PERCH <br />„ <br />co <br />BLUEGILL <br />LARGEMOUTH BASS <br />CHANNEL CATFISH <br />BLACK BULLHEAD <br /> Low HIGH TOLERANCE <br /> TO ROTENONE