9393

• UCREFRP Catalog Number: 9393
• Author: Crist, L. and R. Williams.
• Title: Five Year Flaming Gorge Research Program FY 1995.
• USFW Year: 1994.
• USFW - Doc Type: 32-41, Fg-I,
• Copyright Material: NO

and analysis of previous collections of Age 0 fish from the lower Green,
conventional sampling techniques for spawning adults and larval sampling in
the lower 50 km of the Green River. Results of the study will be evaluated
after one year of sampling to determine if further collections are needed
Study #39. Reproduction and Recruitment of Gila sp. and Colorado squawfish
in the Middle Green River.
Study Goals
Determine if test flows from FGD optimize habitats needed for adequate
reproduction and recruitment of Gila sp. and Colorado squawfish in the
middle Green River and propose modifications as needed.
Relationship to Research Program
As discussed for study #38, additional information is needed for the Green
River below the Duchesne and White rivers to support upcoming Biological
Opinions on the Green and Duchesne rivers. This study would provide
information to assist in refining flow recommendations for the lower Green,
particularly for humpback chub. This study would draw additional information
from the Analysis of Past Collections (completed). The study would be
partially funded by the CUWCD since information would- be used in the Uinta
Basin Replacement Project Biological Opinion.
Description of Work
Previous studies have indicated the presence of a low density, fluctuating
population of Gila sp. in Desolation/Gray Canyons on the Green River. This
study would determine timing of Gila spp. reproduction in the canyons. It
would also determine reproductive success, growth rates and habitat use of
early fife stages of Gila and the relationship with Green River flows. This
study would also determine if Colorado squawfish spawning is occurring at
other locations in Desolation/Gray Canyons than the Three Fords site. Study
methods would include a biological and geomorphic components. Biological
sampling would include early life history collections in study sections based
on previous UDWR sampling efforts, scale analyses for age and growth
determinations and standard adult collection techniques to identify potential
spawning locations of adult squawfish.
Study #40. Evaluation of Restoration Potential of the Green River Upstream of
the Yampa River
Study Goals
To provide initial information to evaluate the potential for restoration of
endangered fish species in the Green River upstream of the Yampa River.
Relationship fo Research Program
One of the primary objectives of the Recovery Implementation Program (RIP)
is to restore to former levels, the distribution and abundance of rare and
Flaming Gorge Research Program 28