Studies on Loch Lomond, Volume 2

adults Altquhur Burn Ancylus fluviatilis aquatic average Baetis Balfron Blane Water Blanefield bottom fauna Brown Trout Carron Coleoptera common species Crustacea current is slow Diptera downstream Drymen Ecdyonurus edge elsewhere Maitland Endrick valley Ephemeroptera extreme lower reaches fish growing in silt habitats Hirudinea Hunter Hydracarina Hynes important invertebrate invertebrate fauna Killearn lacustris large numbers larvae Leuctra Loch Lomond Macan main river METRES middle and upper middle reaches Mollusca moss Müller never abundant nil nil nil number of species numbers occurs Oligochaeta Orthocladius Pisidium Plecoptera population present quantitative recorded Rhyacophila river at station river bed River Endrick River Leven samples sand Sea Trout sewage effluents sewage fungus shallow water silted gravel Simulium single specimen source to mouth spates spawning station 2 Woodend station 5 Drumtian Stone Loach stones in riffle streams stretch substrate summer temperature Three-spined Sticklebacks tributaries Trichoptera uncommon upstream weed growing whilst Woodend zonation