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of year walleye captured in the Green River. This year, 2006, does however mark the year with <br />the largest number of walleye captured in the Green River since nonnative removal efforts began <br />in 2001 (Table 1). There is no evidence, however, to suggest that these fish originally came from <br />Starvation Reservoir, though it is a likely source for walleye captured in the middle Green River. <br />A more likely source for walleye captured in the lower Green River is Lake Powell. Though we <br />do not know the source of these fish at this time, the Colorado Division of Wildlife is currently <br />conducting a study to pinpoint sources of key nonnative species in the upper Colorado River <br />Basin mainstem rivers. Thus the source of these fish should be identified within the next few <br />years. If the Program believes that walleye will eventually successfully spawn and recruit in the <br />Green River, screening or another management alternative may be necessary to minimize risk. <br />In addition to walleye and smallmouth bass, yellow perch, though not originally <br />identified as a target species, have a high potential for escapement from the reservoir after having <br />been introduced into Starvation Reservoir prior to 2002. This species was shown to escape the <br />reservoir at approximately the same rate as walleye. Yellow perch are not often encountered in <br />the Green River, nor have young-of--year yellow perch been observed. They are not as <br />piscivorous as walleye and thus they may not need to be targeted; however, given they are new <br />to the reservoir, they are included herein as a target species. <br />X <br />