7422

• UCREFRP Catalog Number: 7422
• Author: Valdez, R. A. and W. J. Masslich.
• Title: Winter Habitat Study of Endangered Fish - Green River.
• USFW Year: 1988.
• USFW - Doc Type: Logan, Utah.
• Copyright Material: NO

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DRAFT

Table 8.

SUmmary statistics for Razorback Sucker depth utilization.

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Sample N Mean Variance Minimum Maximum
1987 228 4.44 5.19 0.00 9.80
1988(n)1 360 3.98 3.04 1.30 8.50
1988(i)2 72 2.98 3.57 0.50 6.90
1 = 1988 data for no ice cover
2 = 1988 data for ice cover
Velocity

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The raw frequency data associated with utilization of velocity for razorback
suckers for the 1987, 1988 no ice and 1988 with ice cover data are provided in
Figure 26. The associated summary data for these data partitions are contained
in Table 9.

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Table 9. SUllmary statistics for Razorback Sucker velocity utilization.

Sample N Mean variance Minimum Maximum
. 1987 236 0.85 0.57 0.00 3.00
1988(n)1 360 0.83 0.48 0.10 3.30
1988(i)2 72 0.40 0.16 0.10 1.20
. 1 = 1988 data for no ice cover
2 = 1988 data for ice cover

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No significant differences in the variance or the man of the velocity data for
the 1987 versus the 1988 no ice cover data was found (F=1.18, T=0.28) and is
supported by the frequency data presented in Figure 26. Significant
differences for both the variance and the man were found for a comparison of
the 1988 no ice versus ice cover data (F=3.04, T=7.30). However, the limited
data set available for the ice cover partition and inspection of the frequency
data in Figure 26 would suggest that this difference is an artifact of the low
sample size.

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substrate

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The frequency data for substrate utilization of razorback suckers for the 1987,
1988 no ice and 1988 ice cover data sets are contained in Figure 27. No
significant difference between the 1987 and 1988 no ice data partitions were
found, while a significant difference between the 1988 no ice versus ice cover
was observed. As was noted above, the limited data set associated with the ice

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