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Table 1. Fish species composition in the Upper Colorado River (Continued) <br />Poeciliidae <br />Gambusia affinis <br />Centrarchidae <br />mosquitofish <br />NN I - <br />Le orris g ellus <br />Le orris macrocheilus <br />Micropterus dolomieui <br />Micro terus salmoides <br />Pomoxis nigromaculatus <br />Cottidae <br />Cottus bairdi <br />green sunfish NN I I <br />bluegill NN I - <br />smallmouth bass NN I - <br />largemouth bass NN I - <br />black crappie NN I - <br />mottled sculpin NA R R <br />J Origin: NA - Native; NN - Nonnative; EN - Endemic to Colorado River <br />J Relative Abundance: A - Abundant; C - Common; I - Incidental, May be <br />Locally Common to Abundant; R - Rare; hyphen (-) - Absent <br />UCR: Upper Colorado River below the Price-Stub Irrigation Diversion Dam <br />Above PS: Above the Price-Stub Diversion Dam <br />First reported in this reach by Valdez (1984)