PERMFILE131321

• Permit No: C1981044
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Table A-2 through Table A-12
• Section_Exhibit Name: EXHIBIT 15 FISH SURVEY OF THE WILLIAMS FORK RIVER
• Media Type: D
• Archive: No

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TABLE A-7
DENSITIES (N0./FTZ) AND PERCENT RELATIVE ABUNDANCES (°,6RA)
MACROINVERTEBRATES COLLECTED BY SURBER SAMPLER AT STATION
WILLIAMS FORK RIVER NEAR CRAIG COLORADO, SEPTEMBER 17,

OF BENTIIIC
1, IN T1iE
1981.
Taxa Rep 1 Rep 2 Rep 3 Rep 4 Mean °tiRA S.D.
Oligochaeta
Naididae
_ Pristina sp. 7 0.2 0.1 0.5
Castropoda
Ancylidae
Ferrissia sp. 1 1 0.5 0.2 0.6
Physidae
v Physa sp. ] 1 0.5 0.2 0.6
rn
Ephemeroptera
Baetidae
Bae[is sp. 12 10 17 9 12.0 4.7 3.6
Baetis ,
insignificans 4 1 1.3 0.5 1.9
Ephemeridae ,
Ephemera sp. I 0.2 0.1 0.5
Ephemerellidae
Ephemerella sp. 8 8 3 7 6.5 2.5 2.4
Heptageniidae
Heptagenia sp. 1 0.2 0.1 0.5
Rithrogena sp. 8 16 6 15 11.2 4.4 5.0
Tricorythidae
Tricorythodes sp. 1 2 2 ].3 0.5 1.0
Odona[a
Gomphidae
O~hiogomphus severus 1 0.2 0.1 0.5
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