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?.4s <br />Q. Why not harvest the problem species? <br />A. Generally, the problem species are gizzard shad, carp, <br />and bullheads. These are fish that have very high <br />reproduction rates and that are very tolerant of <br />declining water quality. If predator populations are <br />over-fished, so many young of the problem species <br />survive that they soon may represent over 90% of the <br />fish present. When this occurs, the lake or stream <br />becomes filled with small stunted fish. Gizzard shad <br />cannot be caught on hook and line and they have no <br />food or market value. Although some large carp and <br />bullheads may be taken by anglers or commercial <br />fishermen, they are generally not very popular spe- <br />cies. The commercial value of these fish is also quite <br />low. Commercial fishing will remove the largest fish <br />but the space provided by their removal is usually <br />filled by even more young carp, shad, or bullheads. <br />Q. How is rotenone applied? <br />A. It is applied as a wettable paste/powder or an <br />emulsifiable spray concentrate that contains about 5% <br /> <br /> <br /> <br />,. d <br />?q <br />-C <br />