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<br />Listing (Cont'd): <br /> <br />2. One fish without critical habitat: <br /> <br />a. Bonytail chub (Gila elegans) <br /> <br />Listing packages for the following species have been forwarded to <br />Washington: <br /> <br />1. Three fish species with critical habitats: <br /> <br />a. <br />b. <br />c. <br /> <br />Yaqui chub (Gila purpurea) <br />Yaqui shinerLNOtropis f0111losus mearnsi) <br />Yaqui catfish (Ictalurus pricei) <br /> <br />2. Three plant species, two with critical habitat: <br /> <br />a. Hedeoma diffusum <br />b. Erigeron kuschei <br />c. Rumex orthoneurus <br /> <br />One fish proposed for listing has been withdrawn due to lack of time: <br /> <br />Razorback sucker (Xyrauchen texanus) <br /> <br />Hybrid Chubs <br /> <br />Three'female bonytail chubs were removed from Lake Mohave to Willow Beach <br />NFH as.part of the recovery for this fish species, bringing the number <br />being held there to five. As no male G. elegans were available, the ripe <br />eggs were stripped and fertilized with-milt from two closely related <br />species, Gila robusta (roundtail chub) and Gila cypha (humpback chub). <br /> <br />The purpose of this hybridization was spelled out in the bony tail chub <br />recovery plan to examine the morphology of hybrids and to detennine the <br />fertility of the hybrids.' Approximately 3,000 fry of each cross were moved <br />to Dexter NFH in New Mexico to prevent any escapement into the Colorado <br />River system where they might contaminate existing gene pools. The hybrid <br />fry are growing well at Dexter and are salllPled weekly. <br />, ,. <br /> <br />San Bernardino Ranch <br /> <br />The old Chisan Rancl1 was purchased by the Nature Conservancy under a <br />Memorandum of Understanding with the Service to obligate funds in FY 1982. <br />San Bernardino Ranch in southeast Cochise County holds the last remaining <br />U.S. populations of two Rio Yaqui fish species. Service plans are to <br />return the cienegas ori the ranch to their natural state and to reintroduce <br />all of the Rio Yaqui fish species (n=5) to the pools, springs and ponds on <br />the ranch. The Conservancy will care for the buildings, some of which are <br />registered historic landmarks. <br /> <br />C-52 <br />