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Reprinted from THE SOUTHWESTERN NATURALIST <br />Vol. 38, No. 4, December 1993 <br />Made in United States of America <br />USE OF LARVAL LIGHT TRAPS TO CAPTURE RAZORBACK <br />SUCKER (XYRAUCHEN TEXANUS) IN LAKE MOHAVE, <br />ARIZONA-NEVADA <br />GORDON MUELLER, MIKE HORN, JOE KAHL, JR., THOMAS BURKE, AND <br />PAUL MARSH <br />Bureau of Reclamation, P.O. Box 25007, Denver, CO 80225 (GM) <br />Bureau of Reclamation, P.O. Box 61470, Boulder City, NV 89005 (MH, JK, TB) <br />Arizona State University, Center for Environmental Studies, Tempe, AZ 85287 (PM) <br />The razorback sucker (Xyrauchen texanus), once caused the fish to become uncommon to rare <br />common throughout the Colorado River Basin, (Lanigan and Tyus, 1989) except for a large relic <br />is now listed as federally endangered. Habitat population in Lake Mohave, Arizona-Nevada <br />degradation and non-native fish predation have (Minckley et al., 1991). Biologists from six agen-