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TABLE A 11 <br />DENSITIES (NO.JFTZ) AND PERCENT RELATIVE ABUNDANCES (%RA} OF BENTHIC PIACROINVERTEBRATES COLLECTED BY <br />SURBER SAPIPLER AT STATION 2 IN TIIE WILLIAPIS FORK RIVER NEAR CRAIG, COLORADO <br />NOVEPIBER 19, 1981 <br />Taxa Rep 1 Rep 2 Rep 3 Rep 4 Plean %RA S.D. <br />Epl~emeroptera <br />Baetidae <br />8aetis sp. 198 <br />Ephemerellidae <br />Ephemerella sp. 43 <br />Heptageniidae <br />1leptaRenia sp. <br />Rithrogena sp. 95 <br />Leptophlebiidae <br />N Paraleptophlebia sp. 34 <br />0o Siphlonuridae <br />Ameletus sp. <br />Tricorythidae <br />Tricorythodes sp. 23 <br />Plecoptera <br />Capniidae <br />immature <br />Chloroperlidae <br />Alloperla sp. <br />Perlidae <br />Claassenia sabulosa <br />Perlodidae <br />Isoperla sp. 61 <br />Taeniop[erygidae <br />Taenionema sp. 56 <br />119 43 86 111.5 19.9 65.5 <br />18 5 24 22.5 4.0 15.6 <br />1 1 0.5 0.1 0.6 <br />60 56 32 60.8 10.9 26.0 <br />3 8 11.2 2.0 15.5 <br />] 0.2 <O.l 0.5 <br />ll 8 10.5 1.9 9.5 <br />15 3.8 0.7 7.5 <br />1 0.2 <0.1 0.5 <br />3 3 5 2.7 0.5 2.1 <br />23 6 11 25.3 4.5 24.9 <br />59 5 26 36.5 6.5 25.7 <br />