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<br />Final Report
<br />
<br />List of Tables . ix
<br />
<br />Table 8-2. Monthly numbers of YOY and juvenile humpback chub fin-clipped in the LCR and
<br />recaptured in the mainstem Colorado River " . , . . . . . . . . . . , . , . , , , . . . . . . . . . . . . , . . , , 8-17
<br />Table 8-3. Near-surface activity of radio-tagged adult humpback chub as average proportion of
<br />fish contacted (APFC) during spawning and nonspawning periods, between day and
<br />night, and under low and high turbidity, Fish were located during telemetry
<br />surveillance in the mainstem, November 1990 - November 1992 , . . . . . . . . . . . . . . . , . . . . 8-18
<br />Table 8-4. Near-surface activity of radio-tagg~d adult humpback chub as average proportion of
<br />fish contacted (APFC) during low and high turbidity and between day and night. Data
<br />were collected by remote telemetry station (KILR) within LCRI aggregation, August
<br />1991 - December 1991 and August 1992 - December 1992. , , . , . . . , . . . . . . , .. . . . , . . . 8-18
<br />Table 8-5. Horizontal activity of radio-tagged adult humpback chub as proportion of movement
<br />(> 5 m) during spawning and nonspawning periods, between day and night and under
<br />low and high turbidity. Fish were monitored November 1990 - November 1992. . . . . . . . . . 8-20
<br />Table 8-6. Comparison of horizontal activity of radio-tagged adult humpback chub as proportion
<br />of movements (> 5 m) during research and interim flows in Region I of the mainstem,
<br />October 1990 - November 1992 ........,...".,...........................,... 8-21
<br />Table 8-7. Horizontal movement of radio-tagged adult humpback chub as proportion of
<br />movement (> 5 m) at high and low flows, and high and low absolute ramping rates
<br />as monitored during telemetry observation, November 1990 - November 1992 .........8-21
<br />Table 9-1. Aquatic and terrestrial invertebrates found in gut contents of 158 humpback chub and
<br />in 603 drift samples from the mainstem Colorado River, Grand Canyon, 1992-93 ....,... 9-5
<br />Table 9-2. Frequency of occurrenC3 of principal food categories (number and percentage of
<br />total) in gut contents of humpback chub in Grand Canyon during 1992-93 .............. 9-6
<br />Table 9-3. Average total volume and percent of total volume of principal food categories in gut
<br />contents of humpback chub collected from three fish groups of the Colorado River
<br />in Grand Canyon, 1992-93 . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . .. . . . . , . . . . . . . . . 9-6
<br />Table 9-4. Average total volume and percent volume of principal food categories in gut contents
<br />of humpback chub by season, collected between RM 57 and RM 130, Colorado River
<br />in Grand Canyon, 1992-93 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . , . . . . . . . . . 9-8
<br />Table 9-5. Average total volume and percent of total volume of principal food categories in drift
<br />samples by region in the mainstem Colorado River, Grand Canyon, 1991-93 . '.' . . . . , . . . . 9-9
<br />Table 9-6. Numbers of invertebrates in 100 m3 of water filtered in drift samples by region. in the
<br />mainstem Colorado River, Grand Canyon 1991-93 .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
<br />Table 9-7. Percentage composition by volume of invertebrates in drift samples by season for
<br />Region I and Regions II and III, collected in the mainstem Colorado River, Grand
<br />
<br />Canyon,1991-93 .....................,..................................... 9-11
<br />Table 9-8. Numbers of invertebrates and volume of Cladoohora in drift during rising (up-ramp),
<br />falling (down-ramp) and steady flows in the mainstem Colorado River, Grand Canyon,
<br />
<br />1991-93 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12
<br />Table 9-9. Summary of mean Johnson's electivity indices by season for food items including
<br />Cladoohora and five taxonomic categories of invertebrates collected from 152
<br />humpback chub in the Colorado River, Grand Canyon 1991-93 . . . . . . . . . . . . . . . . . . . . . . 9-14
<br />Table 9-10. Mean numbers per stomach and percent relative abundance of stomach contents for
<br />non-native fishes collected from the Colorado River in Grand Canyon, 1991-1993 . . . . . . . 9-14
<br />Table 10-1. Loss of potential humpback chub habitat between the confluence of the Green and
<br />Colorado rivers, UT and Grand Wash, AZ. ....,.,..,............................. 10-7
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