WSP10664 - Laserfiche WebLink

Home Browse Search

. . possible by habitat alteration and the response to the expectation of and demand for fishing to fulfill project purposes for recreation. These factors should be considered in recovery efforts for the endangered Colorado River fishes. 9. Nonnative fish stocking is an important component of sport fisheries management and commercial aquaculture in the Upper Basin. The establishment and maintenance of sport fisheries and aquaculture activities that do not conflict with efforts to recover the endangered Colorado River fishes is an important objective of both the Service and the States. II. STOCKING OF NONNATIVE AQUATIC SPECIES ALREADY OCCURRING IN THE UPPER BASIN. A. Table 1 identifies existing nonnative fish species that are presently managed by stocking in the Upper Basin and the locations/situations where these fish can be stocked on a routine basis. Stocking in these location/situations is not likely to adversely affect the four endangered fish. Appendix A discusses the basis for concluding that these species/locations/situations are not likely to adversely affect the endangered Colorado River fishes. B. Stocking of species identified in Table 1 in other locations or situations will be evaluated on a case-by-case basis. Stocking of the following additional species which occur in the Upper Basin but are not included in Table 1 will be evaluated on a case-by-case basis: o walleye o yellow perch o tiger muskie o wi pers Case-by-case proposals would at a minimum include the following: 1. the purpose and location of the proposed stocking. 2. the species, numbers, and rationale for selecting the species. 3. the potential for escapement, the potential for survival in critical habitat if escapement occurs, and control measures which could be implemented to reduce the risk of escapement. 3