8178

• UCREFRP Catalog Number: 8178
• Author: Anderson, R. and G. Stewart.
• Title: Riverine Fish Flow Investigations.
• USFW Year: 1999.
• USFW - Doc Type: Fort Collins, CO.
• Copyright Material: NO

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30 Jul. 1998 20 Aug. 1998 3 5ept. 1998 8 Oct. 1998
Microcylloepus sp, 1.3 0.8
Dytiscidae 0.2 0.3
Ochthebius /ineatus 1.0
Ophrogomphusseverus 0.3 1.7 0.3
Corixidae 1.2 0.3 0.2
Ambrysus mormon 0.2
Rhagovelia sp. 0.8
Ancylidae 0.7
Physa sp. 0.2
Pisidium sp. 0.2
Oligochaeta 0.5
Totals 78.7 87.7 394.0 97.3

Table A2.3. Mean number of invertebrates collected from six surber
samples at DutTy surveyed site in July, August, September
and October 1998.

Duffy Tunnel 23 Jul. 1998 20 Aug. 1998 3 8ept. 1998 8 oct. 1998
Mean Mean Mean Mean
Acentrella insignificans 1.5 0,7 0.3
P/auditus virilis 0.3
Camelobaetidius warreni 0.3 4.0 2.5
Acerpenna pygmaea 0.3 0.2
Baetis sp. 13.5 13.2 22.0 15.5
Ephemerella sp. 5.7 55,8
Serratella sp. 8.3 0.2
Heptagenia sp, 0,7 0.2 2.7 3.0
Rhithrogena sp. 0.5 3.0 26.8 59.0
Choroterpes a/biannu/ata 0.8 5.8 1.7
Para/eptoph/ebia sp. 9.5
Traverella albertana 0.2
Ame/etus sp. 0.2 0.3
Tricorythodes corpu/entus 1.7 10.8 2.3
Tricorythodes minutus 4.7 20.0 4.2 4.0
Capnia sp. 0.5
C1aassenia sabu/osa 0.2 1.0 1.3 0.7
/sogenoides sp. 0.3 1.7 3.2 0.8
/soperla sp. 1.8
Brachycentrus occidental is 0.2 0.2
Cu/opti/a cantha 1.2 11.3 8.0 0.5
Protopti/a erotica 8.8 29.2 47.0
He/icopsyche borealis 0.3
Cheumatopsyche sp. 0.5 57.5 68.2 46.5
Hydropsyche cockerelli 5.2 3.5 8.5 1.7
Hydropsyche occidenta/is 1.0 3.0 0.7 2.8
Hydropsyche oslari 2.2 63.2 70.0 36.8