8164

• UCREFRP Catalog Number: 8164
• Author: McAda, C. W. and R. J. Ryel.
• Title: Distribution, Relative Abundance, and Environmental Correlates for Age-0 Colorado Pikeminnow and Sympatric Fishes in the Colorado River.
• USFW Year: 1999.
• USFW - Doc Type: \
• Copyright Material: NO

7. Pearson correlation coefficients of mean catch rates among red shiner, -
sand shiner, fathead minnow, YOY Colorado pikeminnow, and other
native species combined (other)..... .............................. 18
8. Flow variables that were significantly correlated (Pearson correlation
coefficient; P<0.05) with annual fall catch rates of YOY Colorado
pikeminnow, red shiner, sand shiner (no significant correlations), fathead
minnow, and other native species (Other) ................................ 19

9.
Results of multiple regression relating catch rates of red shiner (RS), sand t?
f=
shiner (SS), fathead minnow (FH) and the three species combined
(RS+SS+FH) to various flow parameters ................................ 20
10. Factor loadings of flow variables for factors 1 and 2 ........................ 20
11. Mean of the combined catch rates for red shiner (RS), sand shiner (SS)
and fathead minnow {FM, and the associated group used for discriminant
analysis. ....... ...... .................... ................ 22
12. Means of flow variables used in discriminant analysis to predict correct
group of combined catch rates for red shiner, sand shiner, and fathead
minnow. .............. ........ ................... ......... 22
i
13. Ranked geometric-mean CPE for YOY Colorado pikeminnow and
results of Kruskal-Wallis multiple-comparison z-value test. : ................. 27
14. Multiple regression results showing independent variables used to predict
YOY Colorado pikeminnow abundance in 1982-1996. ...... .... 28 ?. ;
IJ
15. Groupings of YOY Colorado pikeminnow abundance for principal
components analysis and discriminant analysis . ........................... 28
16. Means of flow variables used in multiple discriminant analysis for each
YOY Colorado pikeminnow abundance group .................. ........ 30
17. Relationship between mean length of YOY Colorado pikeminnow in fall
and accumulated temperature units ..................................... 31
18. Comparison of mean CPE for Colorado pikeminnow in fall and the
following spring in Reach 1 (RM 0-110). versus the lower 64 miles of the
same reach, fall 1988-spring 1997. ......... . ... . ... .............. 32
t
19. Mean total length of Colorado pikeminnow in fall and mean total length }
of Colorado pikeminnow the following spring, lower Colorado River, fall
1988-spring 1997. ......... ............................:....... 34
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