WSP12063

• File Number: 8240.300.31.J
• Description: San Juan River - Environmental Studies
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 2/1/2000
• Title: Non-Native Species Interactions: Management Implications to Aid in Recovery of the Colorado Pikeminnow and Razorback Sucker in the San Juan River
• Water Supply Pro - Doc Type: Report/Study

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", Figure] . The Colorado River Basin 5
.:1 Figure 2. The San Juan River Basin 6
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Figure 3. Relative abundance of non-native ftsh species collected during
San Juan River main channel electrofishing surveys, 1987-1997.
Results for 1987-1990 were taken from Brooks and Williams (1993) 16
.,; Figure 4. Catch per unit effort (number offish/minute) for channel
" catfish (top) and common carp (bottom) collected during
electrofishing surveys of the San Juan River, 1991-1997 17
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~:-.J Figure 5. Catch per unit effort (number of fish/minute) for channel
catfish (top) and common carp (bottom) by size class and
" year collected during May and October eIectrofishing
surveys of the San Juan River, 1991-1997 18
Figure 6, Frequency of recapture by channel catfish (top) and
common carp (bottom) upstream and downstream
of original or last capture locations in the
San Juan River, 1992-1997 20
Figure 7. Frequency of recapture by channel catfish (top) and
common carp (bottom) upstream and downstream of
original capture locations in the San Juan River, between
spring and successive falls, 1992-1997 22
Figure 8. Frequency of recapture by channel catfish (top) and
common carp (bottom) upstream and downstream of
.. original capture locations in the San Juan River, between
fall and successive springs, 1992-1997 23
Figure 9. Frequency of recapture by channel catfish (top) and
common carp (bottom) upstream and downstream of
original capture locations in the San Juan River, between
spring and successive falls, 1992-1997 24

San Juan River Non-native Species Interactions, Final Repot1, I February 2000

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