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Last modified
7/14/2009 5:02:31 PM
Creation date
5/18/2009 12:06:30 AM
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UCREFRP
UCREFRP Catalog Number
7801
Author
Valdez, R. A.
Title
Synthesis of Winter Investigations of Endangered Fish in the Green River Below Flaming Gorge Dam.
USFW Year
1995.
USFW - Doc Type
\
Copyright Material
NO
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Table 1. Status of native fishes in the Green River below Flaming Gorge Dam. <br />- - stag <br />Common Name Scientific Name Pre-Dam Post-Dam <br />bluehead sucker Catostomus discobolus C LC <br />bonytail' Gila elegans R E <br />Colorado squawfish' Ptvchocheilus lucius C R <br />flannelmouth suckerz Catostomus latipinnis C LC <br />humpback chub' Gila cvpha LC R <br />razorback sucker' Xyrauchen texanus R R-ADULTS ONLY <br />roundtail chub2 Gila robusta A C <br />speckled dace Rhynichthys osculus A C <br />'federally endangered <br />federal candidate species <br />A = abundant, C =common, LC =locally common, R = rare, E =extirpated <br />Dam in 1962, distribution and abundance of these eight warmwater species were greatly reduced in <br />areas inundated by the reservoir and affected by Coldwater releases. <br />Green River fishes below Flaming Gorge Dam--trout in the tailwaters and natives further <br />downstream-are variably affected by altered IIow, modified water chemistry, and large numbers of <br />non-native fishes. Colorado squawfish, humpback chub, bonytail, and razorback sucker are classified <br />as endangered, under the Endangered Species Act of 1973, as amended, and roundtail chub and <br />tlannelmouth sucker are candidate species. Status and opportunities for recovery of these native <br />Colorado River fishes may be related to winter conditions, as affected by releases from Flaming <br />Gorge Dam. <br />3 <br />
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