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<br />Figure 4,21. San Juan River discharge (as measured at USGS gage 09371010,
<br />Four Corners, New Mexico) versus average juvenile flannelmouth sucker
<br />condition, Condition factor was determined using data collected
<br />by USFWS electrofishing surveys (RM 52 to 158)
<br />within designated reaches, . , . . . . . . . . . . . . . . . . . . , . . . . . . . . . . , , . , . . . . . 4 - 61
<br />
<br />Figure 4,22, San Juan River discharge (as measured at USGS gage 09371010,
<br />Four Corners, New Mexico) versus average adult ilannelmouth sucker
<br />condition. Condition factor was determined using data collected
<br />by USFWS electrofishing surveys (RM 52 to 158)
<br />within designated reaches. . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . , . . . . , 4 - 61
<br />
<br />Figure 4,23. Length-frequency histogram for blue head sucker collected
<br />during October USFWS electrofishing surveys on the San Juan River
<br />(RM 52 to 158). ..................,.......................,..... 4 - 65
<br />
<br />Figure 4.24. Regression line fitted to plot of average catch rates of bluehead sucker
<br />collected during October (1991 to 1997) USFWS electrofishing surveys
<br />on the San Juan River versus sampling trip discharge (as measured
<br />at USGS gage 09371010, Four Corners, New Mexico). . . . .. . . . . . . . . . . . . , 4 - 65
<br />
<br />Figure 4.25. Average catch rates (:I;: standard deviation) of bluehead sucker
<br />during October USFWS electrofishing surveys on the San Juan River
<br />(RM 159 to 180). ...............,............................... 4 - 66
<br />
<br />Figure 4.26. San Juan River discharge (as measured at USGS gage 09371010,
<br />Four Corners, New Mexico) versus average juvenile blue head sucker
<br />condition. Condition factor was determined using data collected
<br />by USFWS electrofishing surveys (RM 52 to 158)
<br />within designated reaches. . . . . , . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . , . . 4 - 68
<br />
<br />Figure 4.27. San Juan River discharge (as measured at USGS gage 09371010,
<br />Four Corners, New Mexico) versus average adult bluehead sucker
<br />condition. Condition factor was determined using data collected
<br />by USFWS ehilctrofishing surveys (RM 52 to 158)
<br />within designated reaches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 68
<br />Figure'4.28. Density of speckled dace in San Juan River secondary channels
<br />(5-mile increments), 1992 to 1997, New Mexico, Colorado, and Utah. . . . . . . . 4 - 71
<br />
<br />Figure 4.29. Relative abundance of nonnative fishes (top) and catch-per-unit-effort
<br />(CPUE) (number of fish/minute) for channel catfish and common carp
<br />(bottom) collected during May and October electroiishing surveys
<br />of the San Juan River, 1991 to 1997. . . , . . . . . . . . . . , . . . . . . . . . . . . . . . . . , 4 - 73
<br />
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<br />
<br />SJRIP Biology Committee
<br />February 1999
<br />
<br />T-9
<br />
<br />Table of Contents
<br />Flow Report
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<br />Figure 4.30. Catch-per-unit-effort (CPUE) (number of fish/minute) for channel catfish
<br />(top) and common carp (bottom) by size-class and year collected
<br />during May and October electrofishing surveys of the San Juan River,
<br />
<br />1991 to 1997. . . . . . . , , . . . . . . . . , . , . . . . . . . . . , . . . . . , . . . . . . . . . , . . . . . 4 - 75
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