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locale, spawning observations, and collections are presented. Temperature and time date were taken. 124. Drummond, R. A., and L. G. Colborn. 1965. S~AyTN~~G Ecological study of cutthroat trout in LIFE HISTORY Trapper's Lake, Colorado: evaluation of ENDANG. FISH cutthroat trout reproduction in the Trapper's TEMPERATURE Lake inlets. Colorado Division of Wildlife, FLOW Denver. Federal Aid Project F-108-R- MOVEMENTS 04/Job 08. 81 pp. TRAPPER'S LAKE 5 Objectives of this study were to study reproduc- tion of cutthroat trout Salmo clarki lewisi and- s. c. pleuriticus in the inlets of Trapper's Lake, Garfield County. Data relating to migra- tion patterns of mature cutthroat were recorded, and infomation concerning stream flows, water temperatures, and water levels in relation to migration patterns is given. 125. Drummond, R. A. 1966. Reproduction and harvest of cutthroat trout at Trapper's Lake, Colorado. Colorado Division of Wildlife, Denver. Special Report No. 10. 26 pp. Studies of natural reproduction, as related to selected influential environmental factors, and fisherman harvest of cutthroat trout were made during 1960-65 at Trapper's Lake, Colorado. Spawner escapement, year-class abundance, creel census are discussed in detail. SPA6JNING CREEL CENSUS AGE AND GROWTH SPORT FISH. ENDANG. FISH MANAGEMENT TRAPPER'S LAKE 5 126. Ecology Consultants, Inc. 1973. Second annual ENVIRON. STUDY report on environmental studies in the FISH vicinity of Hayden Station. Technical MOVEMENTS Report No. 43. 211 pp. FLOW YAMPA R . This report contains the results of investiga- tions of ecosystems in the vicinity of Hayden Station. The objectives of the study were to determine the present status of major species of plants and animals that by their numbers, biomass, or biological activities dominate the communities of which they are a part. 57