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Last modified
7/14/2009 5:02:34 PM
Creation date
5/24/2009 7:16:13 AM
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UCREFRP
UCREFRP Catalog Number
8288
Author
Chart, T. E. and L. Lentsch.
Title
Reproduction and Recruitment of Gila Spp. and Colorado Squawfish (Ptychocheilus lucius) in the Middle Green River 1992-1996\
USFW Year
1997.
Copyright Material
NO
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DESOLATION SPECIES COMPOSITION <br />ELECTROFISHING: 1989-1994 <br />z <br />0 <br />0 <br />a <br />O <br />U <br />F- <br />Z <br />W <br />U <br />W <br />a <br />100 <br />80 <br />so <br />40 <br />20 <br />0 <br />x <br />BH <br />FM <br />CS <br />ass <br /> <br />Figure 3.- Relative abundance of the six most common species collected while <br />electrofishing in Deco/Gray Canyons of the Green River, Utah; 1989-1996. <br />Gila spp. catch rates at the fow trend sampling sites have hovered below 0.2 fish per net how <br />since 1992 (Figure 4). Catch rates were greatest at all sites in 1989; significantly greater that year <br />at RMs 184.8 (0.72 fish /how) and 160 (0.574). In 1993 and 1996, catch rates for atl trend sites <br />dropped below 0.1 fish /hour, which, along with the 1986 results, represent ow lowest catch rates <br />on record. wth the exception of the anomalous results in 1989, catch razes at all fow trend sites <br />have been fluctuating at low levels since sampling began there, particularly when compared with <br />CPEs in Westwater Canyon (Chart and Ii,emsch 1997) or the Grand Canyon of the Colorado <br />River (Valdez aad Rye11996 ). <br />DRAFT 6 <br />,,.~ ~~oe ~zo~ ~ a~+es ,,•e~o e-ano a•~~ss <br />
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