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r + <br />a <br />r <br />Based on this understanding of the ecological requirements of Colorado squawfish it is the <br />position of the U. S. Fish and Wildlife Services that the prime adult habitat found in the Grand <br />Valley must be preserved. The adult population of Colorado squawfish above Westwater Canyon <br />currently consists of only about 250 individuals. An increase in the frequency of strong year <br />classes will be needed to boost the size of this population. To do so will require spring flow <br />regimes to more approximate the historical norm, coupled perhaps with a reduction in non-native <br />competitors and predators and a reduction in waterborne contaminants. In the meantime, all steps <br />must be taken to maintain and enhance conditions in that portion of the Colorado River that <br />affords the best habitat for adults, i.e., the Grand Valley, including the 15-mile reach. <br />11