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PROCEEDINGS OF THE DESERT FISHES COUNCIL 1993 - VOLUME XXV <br />spinedace numbers and distribution. A contract with the FWS, National Fisheries Research Center, will continue <br />at this site to gather habitat requirement information and assist in recovery of this species. <br />5. Ash Meadows System populations - A study of the Ash Meadows System populations was initiated under <br />contract with the FWS, National Fisheries Research Center in 1990. Only preliminary data has been received from <br />the contract agency. <br />6. Virgin River Fishes - Survey work on the Virgin River was increased in 1993 and low numbers of <br />woundfin, Plagopterus argentissimus, were found in both the Mesquite and Riverside areas of the Virgin River. A <br />few Virgin River roundtail chubs,Gila robusta seminuda, were also contacted in the Nevada reaches. Work will <br />continue to monitor the presence and status of these fish at Nevada locations. <br />7. Razorback sucker, Xyrauchen texanus - Field work over the last year has included assistance on intra-agency <br />Lake Mohave projects and surveys on Lake Mead. Lake Mead efforts have thus far resulted in 46 Razorback <br />suckers captured, tagged, and released. Future plans are to capture Mead and Mohave larvae for growout ponds <br />for eventual release of sub-adult fish back into Lake Mead. <br />8. Big Springs spinedace, Lepidomeda mollispinis pratensis - Initial life history work was contracted in 1989 <br />to the University of Nevada, Las Vegas. To date, this final report has not been completed. In 1993, spot surveys <br />were conducted on the lower reaches of Condor Canyon and spinedace were found to be very abundant. Upper <br />Condor Canyon was impacted by heavy flood waters this spring, very few adults were found here, although <br />young-of-the-year fish were very abundant in July, 1993. <br />9. Railroad Valley springfish, Crenichthys nevadae - Populations in Railroad Valley, at Lockes Ranch and <br />Chimney Spring, are stable. In 1993, mark-and-recapture estimates gave values consistent with 1989 estimates. <br />Numbers of fish, totaled from all four Lockes Ranch springs, exceed 13,000 fish. Populations in the Duckwater <br />Valley; Big Warm Spring, and Little Warm Spring, continue to be depressed. The isolated introduced populations <br />at Sodaville and at Hot Creek Canyon remain at stable levels although they have shown slight impacts from recent <br />habitat alterations and development. <br />10. Relict dace, Relictus solitarius - Three years of summer survey work in Ruby Valley, Butte Valley, Steptoe <br />Valley, Goshute Valley, and Spring Valley has been completed. All Valleys have shown at least some Relictus loss <br />of distribution or abundance since earlier surveys completed in 1980. Butte Valley populations have persisted in all <br />areas except pluvial Lake Waring. Numbers of Steptoe Valley populations have remained constant. Ruby Valley <br />populations appear to have suffered the greatest reduction and now potentially the greatest threats; but Relictus are <br />still found in Franklin Lake and on the Ruby Lake National Wildlife Refuge. The Goshute Valley population at Big <br />Spring is still present, it was feared lost in 1980. Finally, two introduced populations in Spring Valley still exist. <br />11. Fish Lake Valley tut chub, Gila bicolor ssp. - No chubs were found in Fish Lake. The McNet ranch <br />population still remains strong although goldfish were recently introduced. Fish Lake Power Company has plans <br />for geothermal wells just north of this area, this may have potential for construction of chub refiigia ponds. Tut <br />chubs were also found in a pond near Lida, Nevada. These are suspected to be Fish Lake Valley tut chubs. <br />12. Pahranagat Valley speckled dace, Rhinichthys osculus ssp. - A potential undescribed form of speckled dace <br />was found in lower Pahranagat Valley in 1987. These fish were saved from extirpation in their existing habitats and <br />placed in Maynard spring. Since the transfer in 1991, numbers have greatly increased and systematics work can now <br />be done on these fish. <br />13. Moorman White River springfish, Crenichthys baileyi thermophilis - At the springfish sanctuary on Hot <br />Creek, largemouth bass were removed in 1992, but have since re-invaded. Springfish numbers were very healthy <br />after the bass removal, but will decline as the young invading bass begin to feed. NDOW has made plans to improve <br />the fish barriers and remove the bass so that this population can again be protected. <br />14. Muddy (Moapa) River fishes - Surveys concentrated on distribution and abundance of the Moapa roundtatl <br />chub. Chub and springfish populations isolated from Tilapia aurea seem to be very healthy. Moapa speckled dace, <br />Rhinichthys osculus moapae, and Moapa dace, Moapa coriacea, maintain relatively small numbers and limited <br />distribution. <br />15. Miscellaneous fish species - Some random time was spent on the following species or localities: Hot Creek <br />Valley tui chub, Railroad Valley tui chub, Meadow Valley Wash, Virgin River spinedace, and the Oasis Valley <br />speckled dace. <br />RESUt1IEN <br />Et programa de peces endemicos del Departamento de Vida Silvestre de Nevada (NDOW) tiene la <br />responsabilidad del monitoreo, ]a evaluacion y la coordinacion del programa para todas las especies y subespecies <br />endemicas y peces no comerciales dentro de los ]finites geograficos del Estado de Nevada. De ]as 94 especies y <br />subespecies conocidas Como nativas at Estado de Nevada, 57 se encuentran enlistadas por el Servicto de Caza y <br />Pesca de los Estados Umdos (USFWS). De estas 57 especies enlistadas, veinte (20) han sido enlistadas como en <br />11