USGS Open-File Report 02-012
Physical Data and Biological Data for Algae, Aquatic Invertebrates, and Fish from Selected Reaches on the Carson and Truckee Rivers, Nevada and California, 1993-97
Table 31. Data for fish and crayfish collected at sites on the Carson River: East Fork Carson River near Dresslerville, Nev. (site 1, fig. 1), 1993-1995
[Symbols and abbreviations: --, not determined; N, number; SD, standard deviation]
| Scientific name (Genus species) |
Common name | N | Length, in millimeters | Weight, in grams | Percent abnormal | ||||
|---|---|---|---|---|---|---|---|---|---|
| Mean totala |
SD | Mean standardb |
SD | Mean | SD | ||||
| Reach A (216 m sampled on September 28, 1993) | |||||||||
| Catostomus platyrhynchus | mountain sucker | 52 | 93 | 15.2 | 78 | 12.6 | 9.3 | 5.2 | c 3.8 |
| Pacifastacus leniusculus | crayfish | 79 | 82 | 7.1 |
-- |
-- |
-- |
-- |
0 |
| Rhinichthys osculus | speckled dace | 137 | 62 | 6.9 | 52 | 5.8 | 2.7 | 1.0 | 0 |
| Richardsonius egregius | Lahontan redside | 13 | 74 | 10.2 | 63 | 8.8 | 5.1 | 2.3 | 0 |
| Reach B (183 m sampled on September 28, 1993) | |||||||||
| Catostomus platyrhynchus | mountain sucker | 12 | 89 | 12.5 | 74.1 | 10.4 | 8.3 | 3.4 | 0 |
| Catostomus tahoensis | Tahoe sucker | 3 | 147 | 46.8 | 121 | 39.7 | 22.8 | 19.7 | 0 |
| Pacifastacus leniusculus | crayfish | 34 | 83 | 8.4 |
-- |
-- |
-- |
-- |
0 |
| Rhinichthys osculus | speckled dace | 109 | 60 | 11.5 | 50 | 10.5 | 2.9 | 1.8 | 0 |
| Richardsonius egregius | Lahontan redside | 10 | 68 | 11.2 | 56 | 9.2 | 4.0 | 2.2 | 0 |
| Salmo trutta | brown trout | 1 | 327 |
-- |
282 |
-- |
372 |
-- |
0 |
| Reach B (183 m sampled on August 24, 1994) | |||||||||
| Catostomus platyrhynchus | mountain sucker | 56 | 98 | 30.3 | 86 | 22.3 | 14.8 | 11.0 | 1.8c |
| Catostomus tahoensis | Tahoe sucker | 36 | 128 | 52.3 | 109 | 45.5 | 36.9 | 36.8 | 2.8c |
| Pacifastacus leniusculus | crayfish | 10 | 78 | 14.9 |
-- |
-- |
-- |
-- |
0 |
| Rhinichthys osculus | speckled dace | 105 | 60 | 14.3 | 50 | 12.3 | 3.0 | 2.5 | 0 |
| Reach B (183 m sampled on August 24, 1994) | |||||||||
| Richardsonius egregius | Lahontan redside | 32 | 69 | 20.2 | 58 | 18 | 4.9 | 4.6 | 6.2c,d |
| Salmo trutta | brown trout | 2 | 160 | 123 | 142 | 115 | 87.9 | 120 | 0 |
| Reach B (183 m sampled on September 27, 1995) | |||||||||
| Catostomus platyrhynchus | mountain sucker | 29 | 96 | 20.6 | 80 | 18.8 | 10.8 | 10.4 | 13.8a,e |
| Catostomus tahoensis | Tahoe sucker | 2 | 91 | 28.3 | 76 | 24.7 | 8.4 | 6.7 | 0 |
| Pacifastacus leniusculus | crayfish | 20 | 78 | 13.3 |
-- |
-- |
-- |
-- |
0 |
| Rhinichthys osculus | speckled dace | 121 | 57 | 11.8 | 47 | 11 | 2.2 | 1.2 | 2.5c |
| Richardsonius egregius | Lahontan redside | 70 | 78 | 17.1 | 62 | 14 | 4.1 | 2.6 | 2.9c |
| Salmo trutta | brown trout | 9 | 174 | 37.3 | 149 | 33 | 54.5 | 43.8 | 0 |
| Reach B (183 m sampled on October 11, 1996) | |||||||||
| Catostomus platyrhynchus | mountain sucker | 20 | 104 | 48.3 | 89 | 43 | 22.4 | 23.8 | 0 |
| Catostomus tahoensis | Tahoe sucker | 4 | 182 | 23.2 | 156 | 18 | 76.3 | 25.1 | 0 |
| Rhinichthys osculus | speckled dace | 37 | 68 | 10.1 | 57 | 8.6 | 3.8 | 1.5 | 0 |
| Richardsonius egregius | Lahontan redside | 38 | 84 | 5.3 | 71 | 5.4 | 6.5 | 1.7 | 0 |
| Salmo trutta | brown trout | 11 | 139 | 31.9 | 118 | 26.4 | 30.1 | 21.0 | 0 |
| Reach C (137 m sampled on September 28, 1993) | |||||||||
| Catostomus platyrhynchus | mountain sucker | 28 | 92 | 18.2 | 78 | 16.2 | 9.4 | 6.2 | 0 |
| Catostomus tahoensis | Tahoe sucker | 9 | 162 | 53.3 | 135 | 45.9 | 58.2 | 60.7 | 0 |
| Pacifastacus leniusculus | crayfish | 19 | 74 | 21.7 |
-- |
-- |
-- |
-- |
0 |
| Rhinichthys osculus | speckled dace | 83 | 61 | 9.9 | 51 | 8.2 | 2.7 | 1.4 | 2.4c |
| Richardsonius egregius | Lahontan redside | 74 | 84 | 11.4 | 68 | 9.7 | 6.4 | 2.8 | 2.7c,d |
a For fish, total length, measured from tip of snout to end of
caudal (tail) fin; for crayfish, total length measured from tip of rostrum to posterior edge of telson.
b Standard length measured from snout to end of backbone in the caudal peduncle.
c Fin erosion. Mild fin erosion is considered part of the normal "wear and
tear" on fish. The type of fin erosion considered an abnormality is more severe and indicates fungal or bacterial
infections, various types of stress, and poor overall health (Meador and others, 1993).
d Tumor.
e Anchor worm.