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sturgeon have found a diversity of species which share the habitat (Coker 1930; Fisher 1962; <br />National Research Counci12002; Peters and Parham 2008; Pflieger and Grace 1987) <br />Native fishes: <br />Pallid sturgeon evolved with a diversity of species which were adapted to the same <br />environment of a large, turbid, shifting sand-bed river with fluctuating discharges. Changes in <br />the habitat caused by controls of discharge etc. have allowed certain species to expand their <br />populations while other species like pallid sturgeon have been disadvantaged (Cross 1967; Cross <br />and Moss 1987; Pflieger and Grace 1987). <br />Non-native fishes: <br />The filling of the main stem reservoirs on the Missouri River has created new habitats <br />that has fostered establishment of species which are not native to the system. Some of these <br />species, such as walleye, various salmonid species and lacustrine forage species like smelt were <br />purposely stocked to take advantage of the reservoir habitats (Adams et al. 2003; Beckman and <br />Elrod 1971; Walburg 1977; Walburg et al. 1971). Others, like Asian carps are the result of <br />accidental releases from elsewhere in the Mississippi-Missouri drainage system (National <br />Research Counci12002). <br />Other species: Besides fish there are no known competitors with sturgeon <br />for food resources at any stage in their life cycle. <br />Table 5. References that discuss competition by native fishes, non-native fishes, or other <br />animals with for pallid Sturgeon by life stage and study area.