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<br />PHASE 1. <br />1. Characterize the fish community in the wetlands. <br />Determine anticipated impacts on the wetlands if non- <br />native fish populations were reduced. <br />Better describe potential non-native fish/razorback <br />sucker interactions (i.e., identify a limiting factor) <br />to aid in the development of management strategies. <br />2. Refurbish the wetland outlet structure. <br />Modify outlet to preclude adult piscivorous predators. <br />Determine.the extent of control over wetland water <br />levels. <br />Determine if wetlands can be drained to control non- <br />native fish and to release juvenile razorback suckers <br />into the Colorado River. <br />Determine if the existing water control structure can <br />be protected from beaver dams. Determine the extent to <br />which beaver be allowed to control water levels within <br />the Preserve. <br />Determine optimum water level management to minimize <br />populations of mosquito species known to be a health <br />hazard. <br />Monitor effects of water manipulation on habitat <br />including vegetation, water quality, invertebrates, and <br />wildlife. <br />Develop wells and diversions to provide water of <br />adequate quantity and quality. <br />3. Experiment with razorback suckers and/or bonytail chubs in <br />controlled environments. The north pond may provide an <br />excellent site for some of these experiments. Fish culture <br />and imprinting of larval fish will be conducted at another <br />appropriate facility such as Ouray, Dexter, or Wahweep <br />hatcheries. Water will be available through the development <br />of existing water rights. Some modification of the pond <br />will likely be necessary. <br /> <br /> <br /> <br />11 <br />1 <br /> <br />L <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />Determine survivability, growth rates, food habits, and I <br />interactions with non-native fish species. <br />29 <br /> <br />