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`.J <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />1 <br /> <br />f <br />Currently, small populations of bonytail occur in Lake Mojave and Lake Havasu. <br />Both reservoirs are designated critical habitat (USFWS 1994a). Stocking efforts <br />in Lake Havasu and Lake Mohave are ongoing under projects directed by <br />biological opinions (BO). Bonytail have successfully recruited in the High Levee <br />Pond a small isolated site on Cibola National Wildlife Refuge (CNWR) (Mueller <br />et al. 2002). . <br />Colorado pikeminnow <br />Wild populations of Colorado pikeminnow are extirpated from the lower basin <br />(Minckley 1991). There are ongoing activities to reintroduce this species into the <br />Gila subbasin as an experimental nonessential population (Jahrke and Clark <br />1999). <br />Humpback chub <br />The humpback chub occurs in the Colorado River in Grand Canyon. Although it <br />occurs sporadically throughout the entire subunit the largest concentration of fish <br />is associated with the lower 14.2 km of the Little Colorado River and its <br />confluence. <br />Razorback sucker <br />Small populations of razorback sucker persist in the Grand Canyon and Lake <br />Mead subunits (Minckley and Carothers 1975; Abate et al. 2002). The largest <br />population of razorback sucker occurs in Lake Mohave where fewer than 3,000 <br />individuals remain from the relic adult population (P. Marsh pers. comm.). The <br />number of wild razorback sucker in the Lake Havasu and Parker-Imperial <br />subunits is unknown. <br />Current research on humpback chub in Grand Canyon is based on the Grand <br />Canyon Protection Act of 1992, directed by the Adaptive Management Work <br />Group (AMWG), and implemented by the Grand Canyon Monitoring and <br />Research Center (GCMRC). The Southern Nevada Water Authority (SNWA), <br />' USBR and NDOW are funding investigations on the razorback sucker population <br />in Lake Mead. The Lake Mohave Native Fish Group (LMNFG) and the Service <br />are fulfilling a BO to stock Lake Mohave with subadult razorback sucker and <br />1 bonytail. The Bureau of Land Management (BLM) is completing a BO to stock <br />subadult razorback suckers and bonytail into Lake Havasu. The AGFD and <br /> <br />4 <br />1