9557

• UCREFRP Catalog Number: 9557
• Author: Jackson, J. A. and J. M. Hudson.
• Title: Population Estimate for Humpback Chub ‎(Gila cypha)‎ in Desolation and Gray Canyons, Green River, Utah 2001-2003.
• USFW Year: 2005.
• USFW - Doc Type: 22k,
• Copyright Material: NO

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LIST OF TABLES
Table 1. Population estimate for adult humpback chub > 200 mm in
Deso/Gray Canyon 2001-2003 ..............................................................................23
Table 2. Population estimate of first year adult humpback chub 200-220 mm
in Deso/Gray Canyon 2001-2003, with respective 95%o confidence interval ........23
Table 3. Summary of hours spent for each gear type, total number humpback chub
collected, and percent of recaptured individuals during humpback chub
population sampling in Deso/Gray Canyon 2001-2003 .........................................23
LIST OF FIGURES
Figure 1. Twelve sample sites located within Desolation/Gray Canyon. Black circles
represent long-term monitoring sites. Open circle represents proposed site at
Surprise Canyon .....................................................................................................24
Figure 2. Desolation/Gray Canyon adult humpback chub population estimate
for 2001-2003 .........................................................................................................25
Figure 3. Desolation/Gray Canyon first year adult humpback chub estimate for
2001-2003 ..............................................................................................................25
Figure 4. Desolation/Gray Canyon humpback chub trammel net catch rate
by pass for 2001-2003 ............................................................................................26
Figure 5. Desolation/Gray Canyon humpback chub length-frequency histograms for
2001-2003 ..............................................................................................................27
Figure 6. Mean CPUE of Gila spp. at the four long-term trend sites in Desolation/Gray
Canyon from 1985 to 1986 and 1989 to 2003 .......................................................28
Figure 7. Mean CPUE of Gila spp. at the four long-term trend sites in Desolation/Gray
Canyon from 1985 to1986 and 1990 to 2003 ........................................................28
Figure 8. Desolation/Gray Canyon Gila spp. long-term length-frequency
histograms for 1985, 1986, and 1989-2003 ...........................................................29
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