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PROCEEDINGS OF THE DESERT FISHES COUNCIL 1993 - VOLUME XXV HAMML, JOHN F. U.S. Fish and Wildlife Service, Upper Colorado Recovery Implementation Program, lknwr, CO Endangered Colorado River fishes (Upper Basin) Peces en Peligro de Extinci6n del Rio Colorado (Cuenca Superior) KEYWORDS: Colorado River; Upper Basin; Recovery Implementation Program; endangered fish; status CLAVES: Rio Colorado; Cuenca Superior; Implementacion de un Programa de Recuperacion; peces en peligro de extincion; Estatus ABSTRACT No changes have been detected in population status in the past year. Colorado squawfish Ptychocheilus lucius appear stable in the Green and Yampa Rivers. Adult Colorado squawfish have been collected in the Gunnison River. Status of the small humpback chub Gila cypha populations in the Green and Yampa Rivers is unknown (perhaps stable), but the Colorado River population in Black Rocks and Westwater Canyon appears healthy. Razorback sticker Xyrauehen texanus status remains critical with few adults and little recruitment of larval and young fishes into the older age classes. Larval razorbacks were collected in the Green River this year using light traps. Bonytail chub Gila elegans are very rare, with no confirmed sightings in the Upper Basin in the past several years. The Recovery Program for Endangered Fish Species in the Upper Colorado River Basin remains active, with all parties participating (U.S. Fish and Wildlife Service, U.S. Bureau of Reclamation, Western Area Power Administration, Colorado, Utah, Wyoming, environmental groups, water users, and Colorado River Energy Distributors Association). A $7.7M work plan has been developed for FY 94, which includes $4.4M in capital construction projects such as flooded bottomland restoration, fish passage construction, hatchery facility planning, and water management. Over the past year, Program participants have developed an agreement that clarifies how Section 7 consultation will be conducted in the Upper Basin and a supporting document, the Recovery Implementation Program Recovery Action Plan, which identifies the specific actions needed to recover the fish in the Upper Basin and the dates by which they are to be completed. Significant activities and accomplishments of the Recovery Program over the last year include: 1) filing-for a July-September instream flow right (581 cfs) in the 15-Mile Reach of the Colorado River; 2) a "senior scientist" review of the Service's instream flow recommendations and methodologies; 3) development of a plan to appropriate modifiable instream flow rights for the endangered fishes in Colorado; 4) initiation of National Environmental Policy Act compliance for and design of a fish ladder at Redlands dam on the Gunnison River; 5) completion of genetic surveys; 6) expansion of the Service's research / refugia / hatchery facility at Ouray National Wildlife Refuge; 7) continued development of refuge populations of razorback sucker and Colorado squawfish; and 8) negotiations begun on guidelines for stocking of normative fishes in the Upper Basin. The Service is pursuing designation of critical habitat for all four of the endangered fishes; a proposed rule was published in January 1993. The razorback sucker recovery plan has been delayed by the critical habitat workload. RESUMEN No han sido detectados cambios en el estado de ]a poblacion en el ano pasado. El charal del Colorado Ptychocheilus lucius aparece estable en los rios Green y Yampa. Han sido detectados adultos de charal del Colorado en el rfo Gunnison. El Estado de las poblaciones de charal jorobado Gila c- 11)i en to rios Green y Yampa es desconocido (quizas estables), pero las poblaciones del Rio Colorado en Black Rocks y el canon de Westwater aparecen saludables. El estado del Matalote jorobado Xyrauchen texanus permanece critico con pocos adultos y poco reclutamiento de larvas y juveniles dentro de ]as clases de mayor edad. Este ano fueron colectadas larvas de matalote jorobado en el rio Green usando trampas de luz. El charalito elegante Gila elegans es muy raro, con registros no confirmados en ]a parte superior de la Cuenca, en los ultimos anos. El programa de recuperac16n para especies de peces en peligro de extincion en la Cuenca superior del rio Colorado permanece activo, con todos los partes participantes (Servicio de Pesca y Vida Silvestre de E.U.A., Burl de Reclamation de E.U.A., Administration de Energia del Area Oeste, Colorado, Utah, Wyoming, gr?pos medioambientales, usuarios de agua, y Asociacion de Distribuidores de Energia del Rio Colorado). Un plan de trabajo de $7.7M ha sido desarrollado para el ano fiscal '94, el cual incluye $4.4M en capital de construccion con proyectos tales Como la restauracion de la tierra baja inundada, construction de pasajes para peces, planation de instalaciones para la crianza y administration de aguas. Durante el ano pasado, los participantes del programa han desarrollado un convenio que se aclara Como la consults para Seccion 7 sera dirigida en la Cuenca superior y un documento de apoyo, el Plan de Acci6n para la Programa de Implementaci6n de Recuperac16n, el coal identifica ]as acciones especificas necesarias para recobrar los peces en la Cuenca superior y las fechas en ]as estas deben ser completadas.