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Last modified
7/14/2009 5:02:30 PM
Creation date
5/22/2009 4:33:14 PM
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UCREFRP
UCREFRP Catalog Number
7330
Author
Suttkus, R. D.
Title
Progress Report Survey of Fishes, Mammals and Herpetofauna of the Colorado River and Adjacent Riparian Areas of the Grand Canyon National Park.
USFW Year
1976.
USFW - Doc Type
\
Copyright Material
NO
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<br />"' <br /> <br />Colorado squawfish weights ranged from 525-1,670 9 in <br />1992. Weights ranged from 380-2,951 g from 1977-1990. <br />The mean weight (1,094.8 g) of Colorado squawfish before <br />the dam was completed (1977-1984 data) was not <br />significantly different (P>.10) than the mean weight <br />(1,407.7 g) of Colorado squawfish after the dam was <br />finished (l985-1992 data). The 1977-l984 mode weight <br />(992 g) was smaller than the 1985-92 mode wt (1,280 g). <br /> <br />The 1992 length frequency distribution was similar to the <br />length distribution for 1977-90. The 1977-92 length <br />frequency was skewed to the left with fish < 350 rom <br />under-represented in the sample. <br /> <br />Six Colorado squawfish implanted with transmitters in <br />1992 moved throughout the large pool below Taylor Draw <br />Dam during September and November. <br /> <br />B. Shortcomings <br /> <br />1. The lack of juvenile hatchery-reared Colorado <br />squawfish prevented adequate determination of the <br />presence, abundance, growth, and habitat use of <br />hatchery-reared Colorado squawfish in the White <br />River. <br /> <br />2. The small sample size of large, wild adult Colorado <br />squawfish hindered adequate determination of the <br />presence, abundance, and distribution of Colorado <br />squawfish in the White River. <br /> <br />3. Colorado squawfish scales have not been aged as of <br />October 1992. <br /> <br />4. The 6 Colorado squawfish implanted with radio <br />transmitters only moved within the large pool below <br />Taylor Draw Dam. This lack of movement prevented a <br />full evaluation of movements, home range <br />preference, and seasonal habitat use of the <br />Colorado squawfish in the White River below Taylor <br />Draw Dam. <br /> <br />IX. Status of Data Submission (where applicable): Species <br />composition data from the 1992 study will be sent to the Utah <br />Division of wildlife Resources. PIT tag and radio telemetry <br />data will be sent to the CRFP in Grand Junction, Colorado. <br /> <br />X. FY 92 Budget - Goal 1 <br /> a. Funds Provided: $15,500 ~ <br /> ~ <br /> b. Funds Expended: $15,500 ~ ~ <br /> c. Difference: $ 0 i'> <br /> d. Explanation for any major discrepancy: NA ?C::> <br /> <br />4 <br />
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