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
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