8243

• UCREFRP Catalog Number: 8243
• Author: Valdez, R. A. and R. J. Ryel.
• Title: Developing Recovery Goals For the Four Endangered Colorado River Fishes
• USFW Year: 1999.
• USFW - Doc Type: Scope of Work and Cost Estimate.
• Copyright Material: NO

LITERATURE CITED

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conservation. Conservation Biology 11(1):140-152.
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populations. Transactions of the American Fisheries Society 118:435-440.
Bestgen. K.R. 1990. Status review of the razorback sucker. Xyrauchen texanus. U.S. Department of
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squawfish (Ptychocheilus lucius) in the Middle Green River. 1992-1996. Recovery
Implementation Program for Endangered Fishes in the Upper Colorado River Basin. Utah
Division of Wildlife Resources. 34 pp.
Crowl T.A. and N. W. Bouwes. 1997. Modeling population dynamics of Colorado squawfish,
razorback sucker, and humpback chub: for management objective development. Ecology
Center. Department of Fisheries and Wildlife, Utah State University, Logan.
Czapla. T.E. 1998. Genetics management plan. Recovery Implementation Program for Endangered
Fishes in the Upper Colorado River Basin. U.S. Fish and Wildlife Service, Denver,
Colorado. 54 pp.
Douglas. M.E. and P.C. Marsh. 1996. Population estimates/population movements of Gila cypha,
an endangered cyprinid fish in the Grand Canyon region of Arizona. Copeia 1996( 1): 15-28.
Dowling. T.E. and B.D. DeMarais. 1993. Evolutionary significance of introgressive hybridization
in cyprinid fishes. Nature 362:444-446.
Dowling. T.E. and W.L. Minckley. 1993. Genetic diversity of razorback sucker as determined by
restriction endonuclease analysis of mitochondrial DNA. Final Report to U.S. Bureau of
Reclamation (Contract O-FC-40-0-9530-004). Department of Zoology, Arizona State
University. Tempe. 56 pp:
Dowling. T.E.. W.L. Minckley. P.c. Marsh, and E.S. Goldstone. 1996. Mitochondrial DNA
variability in the endangered razorback sucker (Xyrauchen texanus): Analysis of hatchery

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