8250

• UCREFRP Catalog Number: 8250
• Author: Lamarra, V. A.
• Title: Longitudinal Variation in the Trophic Structure of the Upper Colorado River.
• USFW Year: 1999.
• USFW - Doc Type: Logan, Utah.
• Copyright Material: NO

are first summarized temporally, followed by a spatial analysis. In each analysis, the data are
evaluated on a river-wide basis as well as by habitat type (run and riffle). To determine
significant differences by sample date, stratum or habitat types for the parameters measured
in this study, a one-way ANOVA was performed. A post ANOVA Tukeys HSD («=0.05)
was used to determine which sample trips, stratum or habitat were significantly different
from other factors (trips, stratum or habitat type). The complete statistical results can be seen
in Appendix I.
Table 3. A summary of dates and locations sampled in the Colorado and Gunnison rivers for this investigation.
STRATUM REACH HABITAT Spring Fall Spring Fall TRATUM REACH HABITAT Spring Fall Spring Fall
1994 9
1 A RIF 7 A RIF X X X
RUN X X X RUN X X X
B RIF B RIF X X
RUN X X X RUN X X X
C RIF C RIF X X X
RUN X X X RUN X X X
2 A RIF X X 8 A RIF X X X
RUN X X X RUN X X X
B RIF X X B RIF X X X
RUN X X RUN X X X
C RIF C RIF X X
RUN X X X RUN X X X
3 A RIF X X X 9 A RIF X X X X
RUN x x X RUN X X X X
B RIF X X B RIF X X X X
RUN X X X RUN X X X X
C RIF X X X C RIF X X X X
RUN X X X RUN X X X X
4 A RIF X X 10 A RIF X X X
RUN X X X X RUN X X X
B RIF X X X X B RIF X X X
RUN X X X X RUN X X X
C RIF X X X X C RIF X X
RUN X X X X RUN X X X
5 A RIF X X X 11 A RIF X X X X
RUN X X X RUN X X X X
B RIF X X B RIF X X X X
RUN X X X RUN X X X X
C RIF X X X C RIF X X X X
RUN X X X RUN X X X X
6 A RIF X X X X Gunn A RIF X X X
RUN X X X X RUN X X X
B RIF X X X X B RIF X X
RUN X X X X RUN X X
C RIF X X X X C RIF X X
RUN X X X X RUN X x
8