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<br />Page 31 <br />(Fridell et al. 2004; Morvilius and Fridell 2005). Threats are thought to be relatively limited in <br />this portion of the state as very few non-natives were found relative to native species; however, <br />~ the movement upstream from Lake Powell by non-natives is highly likely and will continue to be <br />monitored throughout the life of the state plan. Detailed information regarding the historical and <br />current status of bluehead sucker and associated threats is found in Table 2-6. <br />Northern Region <br />i <br />Historically, bluehead sucker were found in the Bonneville Basin of Utah in the Weber, Ogden, <br />and Bear River drainages (Andreasen 1973). Recent surveys by the Division's Northern <br />Regional Office indicate that their numbers have been reduced and that they are currently not <br />present or are rare in these drainages (see Table 2-7). The presence of urbanization, nonnative <br />~ fish species, and major water developments are likely the biggest threats to the native species in <br />these drainages. Survey efforts in the Bonneville Basin are ongoing. Future surveys could <br />increase the current known distribution of bluehead sucker in this region. Detailed information <br />regarding the historical and current status of bluehead sucker and associated threats is found in <br />Table 2-7. <br /> <br />i <br /> <br />C~ <br /> <br />i <br />L <br />