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Last modified
8/11/2009 11:32:57 AM
Creation date
8/10/2009 4:48:40 PM
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UCREFRP
UCREFRP Catalog Number
8169a
Author
Brookshire, D. S., M. McKee and G. Watts.
Title
Draft Economic Analysis of Proposed Critical Habitat Designation in the Colorado River Basin for the Razorback Sucker, Humpback Chub, Colorado Squawfish, and Bonytail.
USFW Year
1993.
USFW - Doc Type
\
Copyright Material
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b. Colorado Squawf~sh <br />The Colorado squawfish is the largest in size of the four existing species. Fossils of the <br />mid-Pliocene epoch (about 6 million years ago) indicate that the species had adopted riverine <br />forms that are similar to modern forms. Historically the Colorado squawfish occurred <br />throughout the Colorado River Basin. <br />USFWS is proposing to designate 6 reaches of the Colorado River system (Figure I-2-2) as <br />critical habitat for the Colorado squawfish. In the Upper Basin, critical habitat is being <br />proposed for areas of the Green, Yampa, Colorado, White, Gunnison, and San Juan rivers. <br />Of the historical range of the Colorado squawfish, 29 percent is proposed as critical habitat. <br /> ~. ,® `°" <br /> R ~ <br />~ <br /> «. r fi YilE3 <br /> <br /> M `.: <br />8S <br />I :.Rift <br /> <br />~ ~d° <br />" COLORADO <br />i <br />i <br />~ ~ € <br /> 3 <br /> UTAH <br />NEVADA f <br />i I <br /> i A <br /> <br />21.r ~ <br />LIKE <br />PONE[L ~ <br />N°n <br /> ~ <br />\~~~~ <br />dFi1D <br />/WOYFR <br /> <br />~ <br /> <br />I - <br />G.rminglen <br />~ OW <br />ARIZONA <br />\ <br />uam $ f <br /> N E W <br /> ~ I M E X I C O <br />p <br />~ i <br />~ <br />O fAOrnsfn. <br />Oan <br />4 ~ <br />~ <br />fR10ENIM <br /> <br />v <br /> <br />4P !~ fF" RaaensR <br />paf~ <br /> <br />~~~ i <br /> <br />i lEGQ1D <br /> <br /> <br />ocsiaannax~ <br />.m. ~O" (wan Rw re sd.) <br />Figure I-2-2. Map of Proposed Critical Habitat for the Colorado squawfish. <br />I-7 <br />
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