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sucker larvae from the Middle Green River and DNA fingerprinting to ensure that the wild larvae are not from a few wild parents. Wild razorback sucker larvae will be collected as part of the experimental razorback monitoring study in 1996. Wild razorback sucker larvae from the monitoring effort will be sorted from all larvae collected at the Ouray National Fish Hatchery.and stocked directly into ponds at the facility. The remainder of the larvae will be preserved to be identified later at the Larval Fish Laboratory, Colorado State University, Fort Collins. The Bureau of Reclamation and National Park Service are tracking sonic-tagged razorback suckers in Lake Powell. If tagged fish are congregating in the 1996 spring spawning season, they-will inform the Utah Division of Wildlife Resources personnel from the Lake Powell Project who will attempt to collect these fish to determine if wild adult razorbacks are among the sonic-tagged fish. If wild razorbacks are collected, they will be held at the Wahweap State Fish Hatchery until they can be transferred to the refuge ponds at the Horsethief State Wildlife Area for broodstock development. These fish will be returned to the system when pedigreed family lots have been developed. The potential for collection of adult razorback suckers from Lake Powell is very uncertain because (1) spawning aggregations may not be located and (2) the Lake Powell Project personnel may be involved in other scheduled activities that would preclude their sampling razorback aggregations. C. Colorado S uawfish - U er Colorado River Stock. Seventeen family lots of Colorado squawfish were developed in 1991 using a di-allele 5 X 5 breeding matrix. The progeny are being maintained at the Horsethief State Wildlife Area as future broodstock for future production to be used in reintroduction stocking of the Upper Colorado and Gunnison rivers above the present barrier dams. The development of a broodstock using a breeding matrix of 25 paired matings is "on hold" because available propagation facilities are in use developing the two razorback sucker broodstocks that are considered by the Biology Committee to be of higher priority. D. Humpback Chub - Black Rocks Canyon. The Biology Committee approved the capture of adult humpback chubs from Black Rocks Canyon on the Colorado River in 1995 for holding in a refuge at the Horsethief State Wildlife Area. This action is a precaution to prevent the potential catastrophic loss of that stock because of the close proximity of a railroad right-of-way through the canyon. Fifteen adult humpback chub were collected from-Black Rocks Canyon in September, 1995 and are being maintained at the Horsethief ponds. This will allow Recovery Program participants to become familiar with handling the humpback chub before the additional 15 adults are collected and placed into refuge ponds. If the adult humpback chubs survive the stress of capture, transport, and handling well, another 15 fish will be collected from Black Rocks Canyon in September, 1996.