Mitigation for the Construction and Operation of Libby Dam
Mitigation for the Construction and Operation of Libby Dam
Mitigation for the Construction and Operation of Libby Dam
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Number Fish per 1000<br />
Feet<br />
100<br />
80<br />
60<br />
40<br />
20<br />
0<br />
Trend Analyses<br />
Cutthroat Trout r 2 = 0.05; p = 0.785<br />
Rainbow Trout r 2 = 0.754; p = 0.131<br />
Brook Trout r 2 = 0.529; p = 0.272<br />
Bull Trout r 2 = 0.510 p = 0.286<br />
2000 2001 2002 2003<br />
Years<br />
Cutthroat Trout Rainbow Trout Brook Trout Bull Trout<br />
Figure 24. Cutthroat, rainbow, brook, <strong>and</strong> bull trout abundance estimates (fish per 1000 feet)<br />
<strong>and</strong> linear regression trend analyses within <strong>the</strong> Grave Creek Demonstration Project<br />
monitoring site from 2000-2003 collected by per<strong>for</strong>ming backpack electr<strong>of</strong>ishing. The 2000<br />
<strong>and</strong> 2001 data were collected using single pass electr<strong>of</strong>ishing, <strong>the</strong> data collected in 2002 was<br />
collected via snorkel counts, <strong>and</strong> <strong>the</strong> 2003 data was collected using multiple pass<br />
electr<strong>of</strong>ishing. Upper 95% confidence intervals are represented by <strong>the</strong> whisker bars.<br />
84