7774

• UCREFRP Catalog Number: 7774
• Author: Desert Fishes Council, H., Dean A., ed.)‎.
• Title: Proceedings of the Desert Fishes Council Volume XXIV, 1992 Annual Symposium, 18 to 21 November, Mesa, Arizona.
• USFW Year: 1992.
• USFW - Doc Type: November 18-21.
• Copyright Material: NO

PROCEEDINGS OF THE DESERT FISHES COUNCIL
1992 - VOLUME WV
Some 450 3- to 7-inch Chihuahua chubs (Gila nigrescens) were reared at Dexter National Fish Hatchery and
Technology Center (NFH&TC) for stocking into McKnight Creek. These fish were stocked during October 1992.
During October 1992, approximately 1,650 South Diamond "strain" Gila trout fingerlings (3") were provided by
the Mescalero National Fish Hatchery for reintroduction to historic habitats in the upper Gila River. South Diamond and
Mogollon Creek were the receiving streams
RESUMEN
RECEIVED TOO LATE TO BE TRANSLATED
HAMQ.L, JOHN F. (U.S. Fish and Wildlife Service, Regional Office, Denver, CO)
Endangered Colorado River Fishes (Upper Basin) / Peces en Peligro del Rio Colorado
(Cuenca Alta)
KEYWORDS: Ptychocheilus lucius; Xyrauchen texanus; Gila cypha; Gila elegans; Gila robusta; Catostomus latipinnis;
Colorado River fishes; Recovery Implementation Program for Endangered Fish Species; status
ABSTRACT
Recent data suggest that Colorado squawfish may be increasing in the Green and Yampa Rivers, but the small
population in the Colorado River may be declining. Status of the small humpback chub populations in the Green and
Yampa Rivers is unknown (perhaps stable), but the Colorado River population appears healthy. Razorback sucker status
remains critical with few adults and no recruitment. Bonytail chub are very rare, with none seen in the Upper Basin in
the past several years. The Recovery Program for Endangered Fish Species in the Upper Colorado River Basin remains
active, all parties are actively participating, and a $3.OM work plan developed for FY 93. The Program has made some
progress in protecting instream flows, and all major Federal dams in the Upper Basin are being operated to improve
conditions for the endangered fishes. The Program also is pursuing restoring fish passage to the Gunnison River and
upper mainstem Colorado River near Grand Junction, Colorado. The Program is working to restore access to historically
flooded bottomlands, as well. Genetic surveys and taxonomic studies are underway, and refuge and broodstock
populations are being developed at recently expanded research hatchery facilities. Numerous other research and
monitoring activities continue to collect critical information on the life history and habitat needs of the fishes. The Service
is pursuing designation of critical habitat for all four of the endangered fishes and anticipates publishing a draft rule in
September 1993. The Colorado River Fishes Recovery Team is working on the razorback sucker recovery plan; a public
review draft is expected within about a year. Finally, the flannelmouth sucker and roundtail chub are now candidate
species for listing under the Endangered Species Act.
RESUMEN
Datos recientes sugieren que el charal del Colorado estA incrementandose en los Rios Verde y Yampa, pero la
pequeiia poblaci6n del Rfo Colorado estA en decline. La situaci6n actual de la pequeiia poblaci6n del matalote jorobado
en los Rfos Verde y Yampa es desconocida (quizis estable), pero la poblacidn del Rfo Colorado parece saludable. La
situaci6n actual del matalote jorobado permanece crftica con pocos adultos y no reclutamiento. El charal cola dura es
muy raro, sin ser visto en los ultimos aiios. El programs de Recuperaci6n de Especies de Peces en Peligro en la Cuenca
Alta del Rfo Colorado permanece activo, todas las partes estan participando activamente, y un plan de $ 3.0 M se
desarrolla para el AF 1993. El programa ha tenido progresos en la protecci6n de flujos de arroyos, y todas ]as presas
Federales importantes estan siendo operadas para el mejoramiento de las conditions de loa peces en peligro. El
programa tambien persigue el paso de los peces al Rio Gunnison y el cauce principal alto del Rfo Colorado Cerea de la
Union Grande, en Colorado. El programa esta trabajando para restablecer el acceso a las tierras del fondo hist6ricamente
inundadas. Estan en camino reconocimientos gen6ticos y estudios taxon6micos, y repoblamiento y refugio de poblaciones
se estan desarrollando en las recientemente extendidas instalaciones de granjas. Otras variadas investigaciones y
actividades de monitoreo contimian para. colectar informaci6n crftica sabre ]a historia de vida y necesidades de habitats
de las peces. El Servicio persigue la designation de habitats crfticos para todas los cuatro peces en peligro y publicaciones
anticipadas de reglas en borrador en Septiembre de 1993. El Equipo de Recuperaci6n de los Peces del Rfo Colorado estA
trabajando en el plan de recuperaci6n del matalote jorobado; un borrador para revisi6n pdblica se espera dentro de un
ano. Finalmente el matalote y el charal cola redonda son ahora especies candidatas para enlistarse bajo el Acta de
Especies en Peligro.
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