7400

• UCREFRP Catalog Number: 7400
• Author: Valdez, R. A.
• Title: The Endangered Fish of Cataract Canyon
• USFW Year: 1990.
• USFW - Doc Type: Final Report.
• Copyright Material: NO

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UST OF TABLES
(Continued)

Number

PaQe

Table 21. Criteria established by the Sensitive Areas Document (Biological Sub-Committee 1984)
for the different ages of endangered fish ............................... n

Table 22. Current classifications and recommended changes to the Sensitive Areas Document
(Biological Sub-Committee 1984) for the different ages of endangered fishes ...... 79

Table 23. Recommended sample trips for the Cataract Canyon Area .................. 87

UST OF FIGURES

Figure 1. Administ.ration of the Cataract Canyon Studies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 2. General location of the Cataract Canyon st.udy area . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 3. Detailed map of Region 1: Green River above confluence, RM 50.0 to 0 . . . . . . . . . . . . 6

Figure 4. Detailed map of Region 2: Colorado River above confluence, RM 50.0 to 0 ......... 8

Figure 5. Detailed map of Region 3: Colorado River from confluence to Rapid #1, RM

216.5 to 212.5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10

Figure 6. Detailed map of Region 4: Colorado River in Cataract Canyon, RM 212.4

to 201.5 ........................................................ 11

Figure 7. Detailed map of Region 5: Lake Powell Inflow, RM 201.4 to 195.0. .............. 13

Figure 8. Flows and temperatures of the Green River, Colorado River, and Cataract Canyon
for 1985-1988, as recorded at Green River and Cisco, Utah, USGS data . . . . . . . . .. 15

Figure 9. Basic st.udy elements of the Cataract Canyon studies, 1985-1988. ............... 16

Figure 10. Morphometric measurements taken from each chub (Gila spp.) longer than 200 mm.. 21

Figure 11. Fish species composition in the Cataract Canyon Study Area, 1985-1988. . . . . . . . .. 22

Figure 12. Catch rates of six fish species by age category in backwaters, 1985-1988. ........ 31

Figure 13. Catch rates of the six most common fish species in backwaters by region,

1988 data ..................................................... 39

Figure 14. Species associations between Colorado squawfish and selected native and
non-native species within four selected habitats. . . . . . . . . . . . . . . . . . . . . . . . . . .. 45

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