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DOI	10.2172/6842435
Title	Effect of the Operation of Kerr and Hungry Horse Dams on the Reproductive Success of Kokanee in the Flathead System; Technical Addendum to the Final Report.
Creator/Author	Beattie, Will ; Tohtz, Joel
Publication Date	1990 Mar 01
OSTI Identifier	OSTI ID: 6842435; Legacy ID: DE90011832
Report Number(s)	DOE/BP-39641-6
DOE Contract Number	1986BP39641
DOI	10.2172/6842435
Other Number(s)	R&D Project: 198110500; Other: ON: DE90011832
Resource Type	Technical Report
Specific Type	Progress Report
Research Org	Montana Department of Fish, Wildlife and Parks
Sponsoring Org	United States. Bonneville Power Administration.
Subject	13 HYDRO ENERGY; 54 ENVIRONMENTAL SCIENCES; 59 BASIC BIOLOGICAL SCIENCES; ANADROMOUS FISHES; BASELINE ECOLOGY; HYDROELECTRIC POWER; BIOLOGICAL EFFECTS; ENVIRONMENTAL IMPACTS; ZOOPLANKTON; POPULATION DYNAMICS; DAMS; GROWTH; LIFE CYCLE; MIGRATION; MONTANA; MORTALITY; PROGRESS REPORT; REPRODUCTION; RIVERS; SALMON; ANIMALS; AQUATIC ORGANISMS; DOCUMENT TYPES; ECOLOGY; ELECTRIC POWER; ENERGY SOURCES; FEDERAL REGION VIII; FISHES; NORTH AMERICA; PLANKTON; POWER; RENEWABLE ENERGY SOURCES; STREAMS; SURFACE WATERS; USA; VERTEBRATES
Related Subject	Kokanee salmon - Montana - Flathead Lake - Reproduction
Description/Abstract	This addendum to the Final Report presents results of research on the zooplankton and fish communities of Flathead Lade. The intent of the Study has been to identify the impacts of hydroelectric operations at Kerr and Hungry Horse Dam on the reproductive success of kokanee an to propose mitigation for these impacts. Recent changes in the trophic ecology of the lake, have reduced the survival of kokanee. In the last three year the Study has been redirected to identify, if possible, the biological mechanisms which now limit kokanee survival, and to test methods of enhancing the kokanee fishery by artificial supplementation. These studies were necessary to the formulation of mitigation plans. The possibility of successfully rehabilitating the kokanee population, is the doubt because of change in the trophic ecology of the system. This report first presents the results of studies of the population dynamics of crustacean zooplankton, upon which planktivorous fish depend. A modest effort was directed to measuring the spawning escapement of kokanee in 1988. Because of its relevance to the study, we also report assessments of 1989 kokanee spawning escapement. Hydroacoustic assessment of the abundance of all fish species in Flathead Lake was conducted in November, 1988. Summary of the continued efforts to document the growth rates and food habits of kokanee and lake whitefish are included in this report. Revised kokanee spawning and harvest estimates, and management implications of the altered ecology of Flathead Lake comprise the final sections of this addendum. 83 refs., 20 figs., 25 tabs.
Country of Publication	United States
Language	English
Format	Size: 129 pages
Availability	NTIS, PC A07/MF A01 - OSTI; GPO Dep. To purchase this media from NTIS, click here
System Entry Date	2007 Aug 23
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