Scientific Investigations Report 2006-5111
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006-5111
Table 6. Selected metrics and Index of Biological Integrity scores calculated for fish samples collected during low-flow periods (November to April) from the lower Boise River and least disturbed sites in southwestern Idaho.
[Reach locations are shown in figure 1 and table 2. Data for U.S. Geological Survey fish samples can be found online at http://id.water.usgs.gov/projects/fish/. Reach: *, least-disturbed sites. Abbreviations: DELT, deformities, eroded fins, lesions, or tumors; ND, no data collected]
| Reach No. or site name | Month | Year | Number of cold native species | Percentage of sculpin | Percentage of sensitive native individuals | Percentage of cold individuals | Percentage of tolerant individuals | Number of non-indiginous species | Percentage of carp | Salmonid age classes (no whitefish) | Cold individuals per minute | Percentage of DELT anomolies | Index of Biological Integrity |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Jan. | 1988 | 3 | 22 | 2 | 79 | 9 | 1 | 0 | 3 | ND | ND | 81 |
| Dec. | 1996 | 4 | 50 | 30 | 98 | 0 | 1 | 0 | 3 | ND | ND | 89 | |
| Nov. | 2003 | 4 | 79 | 80 | 97 | 1 | 1 | 0 | 5 | 15 | 0 | 93 | |
| 2 | Jan. | 1988 | 3 | 1 | 0 | 16 | 9 | 1 | 0 | 2 | ND | ND | 54 |
| Apr. | 1992 | 3 | 45 | 2 | 56 | 13 | 1 | 0 | 2 | 5 | ND | 76 | |
| Mar. | 1995 | 4 | 28 | 21 | 59 | 11 | 0 | 0 | ND | ND | ND | 92 | |
| Dec. | 1996 | 4 | 45 | 14 | 74 | 16 | 2 | 0 | 2 | 12 | 0 | 78 | |
| Nov. | 2003 | 5 | 45 | 25 | 91 | 7 | 1 | 0 | 6 | 9 | 0 | 89 | |
| 3 | Jan. | 1988 | 3 | 1 | 0 | 6 | 35 | 3 | 1 | ND | ND | ND | 36 |
| Mar. | 1992 | 2 | 0 | 0 | 20 | 80 | 1 | 1 | 1 | 3 | ND | 33 | |
| Feb. | 1995 | 2 | 0 | 4 | 28 | 51 | 1 | 0 | ND | 4 | ND | 48 | |
| Dec. | 1996 | 4 | 2 | 2 | 31 | 48 | 1 | 0 | 2 | 2 | 0 | 57 | |
| Dec. | 2001 | 4 | 8 | 3 | 77 | 16 | 2 | 0 | 2 | 12 | 2 | 68 | |
| Nov. | 2003 | 5 | 15 | 4 | 69 | 26 | 2 | 0 | 3 | 4 | 3 | 73 | |
| 4 | Jan. | 1988 | 3 | 1 | 5 | 67 | 31 | 1 | 0 | 6 | ND | ND | 70 |
| Mar. | 1992 | 2 | 0 | 3 | 43 | 53 | 1 | 0 | 5 | 3 | ND | 55 | |
| Mar. | 1995 | 2 | 0 | 5 | 83 | 17 | 1 | 0 | ND | ND | ND | 62 | |
| Dec. | 1996 | 2 | 0 | 2 | 70 | 27 | 2 | 0 | 4 | 4 | 1 | 65 | |
| Nov. | 2003 | 3 | 0 | 9 | 90 | 8 | 2 | 0 | 4 | 6 | 1 | 72 | |
| 5 | Jan. | 1988 | 3 | 4 | 4 | 38 | 37 | 1 | 0 | 7 | ND | ND | 67 |
| Mar. | 1992 | 2 | 0 | 0 | 6 | 62 | 1 | 0 | 2 | ND | ND | 35 | |
| Feb. | 1995 | 2 | 0 | 6 | 44 | 20 | 0 | 0 | 2 | 5 | 1 | 67 | |
| Dec. | 1996 | 2 | 0 | 9 | 81 | 11 | 2 | 0 | 2 | ND | 1 | 60 | |
| Nov. | 2003 | 3 | 0 | 27 | 84 | 16 | 2 | 0 | 5 | 5 | ND | 77 | |
| 7 | Dec. | 1996 | 2 | 0 | 0 | 26 | 28 | 2 | 8 | ND | 3 | 1 | 39 |
| 9 | Dec. | 1996 | 1 | 0 | 0 | 8 | 80 | 2 | 2 | 0 | 0 | 2 | 11 |
| *Henry’s Fork River near St. Anthony |
Sept. | 1999 | 3 | 7 | 0 | 78 | 1 | 3 | 0 | 6 | 10 | 1 | 78 |
| *South Fork Snake River near Heise |
Sept. | 2003 | 3 | 2 | 10 | 83 | 13 | 3 | 0 | 3 | 3 | 2 | 65 |
| *South Fork Payette River near Lowman |
July | 2001 | 3 | 73 | 91 | 92 | 0 | 0 | 0 | 4 | 3 | 0 | 99 |
| *Boise River near Twin Springs |
Sept. | 2004 | 5 | 7 | 19 | 46 | 35 | 0 | 0 | 5 | 2 | 0 | 84 |
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Department of the Interior | U.S. Geological
Survey
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