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<br />I <br />I <br />I <br />I <br /> <br />Table A2.2. Mean number of invertebrates collected from six surber samples <br />at the Sevens Ranch in July, August, September and October <br />1998. <br /> <br />I <br />I <br /> <br />SEVENS RANCH 30 Jul. 1998 20 AU9. 1998 3 Sept. 1998 8 Oct. 1998 <br />Species Mean Mean Mean Mean <br />Acentrella insignificens 0.3 3.0 1.0 <br />Ceme/obaetidius warreni 12.0 0.3 6.7 <br />Centroptitum bifurcatum 0.5 0.2 <br />Baetis sp. 2.7 0.8 7.3 0.5 <br />Ephemera simulans 0.2 <br />Ephoron album 1.5 2.0 3.2 <br />Ephemaralla sp. 1.2 1.2 <br />Heptagenia sp. 1.7 1.3 4.0 0.8 <br />Rhfthrogena sp. 0.3 0.2 11.3 7.3 <br />Choroterpes albiannulata 4.0 13.5 0.5 0.2 <br />Pere/eptophlebia sp. 0.2 <br />Treverella elbertane 0.5 0.3 2.2 <br />Ame/etus sp. 0.3 3.2 5.0 <br />Tricorythodes corpulentus 2.7 5.0 3.0 <br />Tricorythodes minutus 7.2 6.8 3.5 1.7 <br />Brechycercus sp. 0.3 <br />Isogenoides sp. 0.2 2.0 0.2 <br />Bfschycentrus accidenta/is 0.2 1.2 0.3 <br />Culopti/a centhe 3.2 0.5 <br />Protoptite erotica 0.2 39.7 5.0 <br />Helicopsyche borealis 0.3 1.0 <br />Cheumetopsyche sp. 0.8 1.7 42.7 9.2 <br />Hydropsyche cockerelli 0.3 0.2 2.8 0.2 <br />Hydropsyche occidentalis 0.2 1.5 2.0 <br />Hydropsyche oslari 0.3 0.2 43.0 8.3 <br />Mayatrichia sp. 0.3 <br />Oacetis sp. 2.8 <br />Nectopsyche stigmatica 0.2 <br />petrophila sp. 0.3 <br />Orthocladiinae 0.2 0.8 0.8 0.7 <br />Tenypodinae 0.7 0.5 <br />Tanytarsini 3.8 2.2 <br />Chironomini 2.0 1.2 0.7 <br />Simulium sp. 0.3 0.2 <br />Hemarodromia sp. 0.2 <br />Hexatoma sp. 0.2 0.2 <br />Rhabdomasox sp. 0.2 <br />Atherix pachypus 0.2 <br />Psychodidae sp. 0.5 <br />Helichus strietus 0.2 <br />Zeftzevia pervule 0.2 0.2 <br />Dubirephia sp. 0.2 0.2 0.2 <br /> <br />I <br />I <br />I <br /> <br />I <br />I <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />35 <br />