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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Table A2.2. Mean number of invertebrates collected from six surber samples
at the Sevens Ranch in July, August, September and October
1998.

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8EVEN8 RANCH 30 Jul. 1998 20 Aug. 1998 3 8ept. 1998 8 Oct. 1998
8pecies Mean Mean Mean Mean
Acentrel/a insignificans 0.3 3.0 1.0
Camelobaetidius warreni 12.0 0.3 6.7
Centroptilum bifurcatum 0.5 0.2
Baetis sp. 2.7 0.8 7.3 0.5
Ephemera simulans 0.2
Ephoron album 1.5 2.0 3.2
Ephemerel/a sp. 1.2 1.2
Heptagenia sp. 1.7 1.3 4.0 0.8
Rhithrogena sp. 0.3 0.2 11.3 7.3
Choroterpes albiannulata 4.0 13.5 0.5 0.2
Paraleptophlebia sp. 0.2
Traverel/a albertana 0.5 0.3 2.2
Ame/etus sp. 0.3 3.2 5.0
Tricorythodes corpulentus 2,7 5.0 3.0
Tricorythodes minutus 7.2 6.8 3.5 1.7
Brachycercus sp. 0.3
Isogenoides sp. 0.2 2.0 0,2
Brachycentrus occidentalis 0.2 1.2 0.3
Culoptila cantha 3.2 0.5
Protoptila erotica 0.2 39.7 5.0
Helicopsyche borealis 0.3 1.0
Cheumatopsyche sp. 0.8 1.7 42.7 9.2
Hydropsyche cockerelli 0.3 0.2 2.8 0.2
Hydropsyche occidental is ' 0.2 1.5 2.0
Hydropsyche oslari 0.3 0.2 43.0 8.3
Mayatrichia sp. 0.3
Oecetis sp. 2.8
Nectopsyche stigmatica 0.2
Petrophila sp. 0.3
Orthocladiinae 0.2 0.8 0.8 0.7
Tanypodinae 0.7 0.5
Tanytarsini 3.8 2.2
Chironomini 2.0 1.2 0.7
Simulium sp. 0.3 0.2
Hemerodromia sp. 0.2
Hexatoma sp. 0.2 0.2
Rhabdomastix sp. 0.2
Atherix pachypus 0.2
Psychodidae sp. 0.5
Helichus striatus 0.2
Zaitzevia parvula 0.2 0.2
Dubiraphia sp. 0.2 0.2 0.2

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