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Last modified
8/11/2009 11:32:56 AM
Creation date
8/10/2009 3:56:33 PM
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UCREFRP
UCREFRP Catalog Number
7743
Author
Miller, A. S. and W. A. Hubert.
Title
Compendium of Existing Knowledge for Use in Making Habitat Management Recommendations for the Upper Colorado River Basin.
USFW Year
1990.
USFW - Doc Type
\
Copyright Material
NO
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25- <br />(1980), Minckley and Gustafson (1982), Tyus and Harned (1985) provide <br />additional information on the spawning period of razorback sucker: <br />Bonytail chub <br />o No data are available concerning spawn timing of this species. <br />Hybridization. <br />Humpback chub <br />o Departure from historic hydrographs may lead to hybridization of humpback <br />chub and roundtail chub. <br />Valdez and Clemmer (1982) reported historic flow regimes to be a <br />possible reproductive isolation mechanism. They suggested that peak <br />flow depletion may lead to more humpback chub - roundtail chub <br />interaction. Temperature changes associated with water depletion was <br />cited as a possible mechanism involved. <br />Resource Consultants, Inc. (1985) hypothesized that flow changes <br />contribute to hybridization of humpback chub - roundtail chub. <br />Tyus et al. (1982) reported hybrids in Desolation Canyon on the Green <br />River. <br />Valdez et al. (1982) reported possible hybrids from the Colorado River <br />near DeBeque, Colorado. <br />0
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