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<br />002747 <br /> <br />No time frames for completion of these activities were specified in the recovery plan. No specific <br />areas for stocking of Colorado squawfish were identified in the recovery plan. However, in March, <br />1994, the USFWS designated 912 river miles within the Upper Colorado River Basin as critical <br />habitat for the Colorado squawfish. <br /> <br />Bony tail chub: The tevised recovery plan for the bonytail chub identified a short-term goal of <br />preventing the extinction of the species due to their severely declining numbers. The propagation, <br />genetics, and stocking related activities called for in the revised recovery plan for the bonytail chub <br />included <br /> <br />I. prevent extinction ofbonytail chub in the wild, <br />2. reintroduce hatchery-reared bonytail chub into the wild, and <br />3. resolve taxonomic problems in Colorado River Basin Gila. <br /> <br />No time frames for completion of these activities were specified in the recovery plan. In March, <br />1994, the USFWS designated 198 river miles within the Upper Colorado River Basin as critical <br />habitat for the bonytaiL <br /> <br />Humpback chub: The propagation, genetics, and stocking related activities called for in the second <br />revision to the recovery plan for the humpback chub included <br /> <br />1. resolve taxonomic problems in Colorado River Basin Gila, <br />2. protect humpback chub populations and their habitats, and <br />3. assess potential reintroduction or augmentation sites and implement stocking where <br />deemed necessary and feasible. <br /> <br />No time frames for completion of these activities were specified in the second revision to the <br />recovery plan. No specific areas for reintroduction were identified in the second revision to the <br />humpback chub recovery plan. However, in March, 1994, the USFWS designated 198 river miles <br />within the Upper Colorado River Basin as critical habitat for the humpback chub. <br /> <br />Razorback sucker: The razorback sucker was listed as endangered in October, 1991. The draft <br />recovery plan is being developed and is expected to be available for public review in January, 1997. <br /> <br />Broodstock Development <br /> <br />Within the Upper Colorado River Basin, eleven presumptive genetic stocks appear to be based on <br />definite spawning aggregations. These presumptive stocks include 2 for the razorback sucker, 5 for <br />the humpback chub, 4 for the Colorado squawfish. The bonytail is functionally extirpated in the <br />Upper Basin. As a result, there is no definite Upper Basin presumptive stock for the bonytaiL The <br />Recovery Program calls for development of refugia and broodstock for each presumptive stock. If <br />sufficient adult endangered fish from these presumptive stocks are available and removal from the <br />wild will not jeopardize genetic diversity, a minimum target of 50 adults (25 males and 25 females) <br />will be used to develop broodstocks to minimize the likelihood of inbreeding. When wild fish stocks <br />are low, a minimum breeding strategy using a 5 male x 5 female di-allele cross will be used to develop <br /> <br />111 <br />