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Last modified
7/14/2009 5:02:33 PM
Creation date
5/22/2009 7:38:36 PM
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UCREFRP
UCREFRP Catalog Number
8159
Author
Trammell, M. and T. Chart.
Title
Aspinall Studies
USFW Year
1999.
USFW - Doc Type
Annual Assessment of Colorado Pikeminnow Larval Production in the Colorado River, Utah 1992-1996 \
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flow year, suggests NNC productivity maybe not on a continuum in regard to flow. Increased <br />NNC densities in 1996 could be the result of improved environmental conditions that were <br />independent of flow. <br />Table 9. Geometric-mean CPE (fish/m2) of NNC (fathead minnow, red shiner and sand shiner) <br />during fall ISMP sampling in Reach 1 and 2 (McAda et al. 1998), and NNC drift <br />densities at Loma (Anderson 1999), Westwater, and Moab with coefficients of <br />determination between NNC density at Reach 1 and 2, and between backwater and drift <br />sampling in the same reach. <br /> <br />YEAR Backwater <br />NNC density <br />fish/m3 Drift <br />NNC density <br />total abundance Backwater <br />NNC density <br />fish/m3 Drift <br />NNC density <br />total abundance <br /> ISMP Reach 1 Westwater Moab ISMP Reach 2 Loma <br />1992 7.7 113610 976200 5.5 597009 <br />1993 6.8 26294 4140555 1.4 64015 <br />1994 8.9 27461 3325758 2.8 512212 <br />1995 3.0 13494 965335 2.6 181363 <br />1996 11.6 151830 1055191 1.1 14683 <br />Pearson's correlation (rz) <br />WW 0.76 <br />MO 0.04 -0.51 <br />Reach 2 0.20 0.11 -0.36 <br />LO -0.03 -0.03 -0.07 0.88 <br />18 <br />
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