Water Temperature Effects on Fall Chinook Salmon in the Snake and Columbia Rivers PDF Download
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Author:
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ISBN:
Category :
Languages : en
Pages : 39
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 39
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Book Description
Author: Kenneth F. Tiffan
Publisher:
ISBN:
Category : Columbia River--Temperature--Effects on--Salmon
Languages : en
Pages : 37
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Book Description
Author: Kenneth F. Tiffan Craig A. Haskell (Ryan C. Koch, Matthew G. Mesa, and Dennis W. Rondorf)
Publisher:
ISBN:
Category :
Languages : en
Pages : 61
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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309166268
Category : Technology & Engineering
Languages : en
Pages : 260
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Book Description
Flows of the Columbia River, although modified substantially during the twentieth century, still vary considerably between seasons and between years. Lowest flows tend to occur during summer months when demand for irrigation water is at its highest and when water temperatures are greatest. These periods of low flows, high demand, and high temperature are critical periods for juvenile salmon migrating downstream through the Columbia River hydropower system. Although impacts on salmon of any individual water withdrawal may be small, the cumulative effects of numerous withdrawals will affect Columbia River flows and would pose increased risks to salmon survival. The body of scientific knowledge explaining salmon migratory behavior and physiology is substantial, but imperfect, and decision makers should acknowledge this and be willing to take action in the face of uncertainties. In order to provide a more comprehensive water permitting process, the State of Washington, Canada, other basin states, and tribal groups should establish a basin-wide forum to consider future water withdrawal application permits. If the State of Washington issues additional permits for water withdrawals from the Columbia River, those permits should contain provisions that allow withdrawals to be curtailed during critical high-demand periods.
Author: Dale A. McCullough
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 0
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Author:
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Category :
Languages : en
Pages : 602
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Author:
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Category : Chinook salmon
Languages : en
Pages : 900
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Author: Theodore H. Blahm
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 24
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Book Description
Author: Theodore H. Blahm
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 32
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Book Description
Author:
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Category :
Languages : en
Pages :
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Snake River fall chinook salmon (Oncorhynchus tshawytscha) are listed as threatened under the Endangered Species Act. At present, limited data exist on the migrational characteristics of Snake River subyearling fall chinook salmon, particularly concerning the proportion of migrants that survive passage through the Snake River dams and reservoirs, the effects of flows and temperatures on survival, and the percentage of subyearlings that are guided away from turbines into collection facilities and transported. As a result, operational strategies to maximize survival have been largely based on data from studies of subyearling chinook salmon that pass through lower Columbia River dams. In 1994, the National Marine Fisheries Service and the U.S. Fish and Wildlife Service began a cooperative study to investigate migrational characteristics of subyearling fall chinook salmon in the Snake River. The primary study objectives were to (1) determine the feasibility of estimating detection and pass age survival probabilities of natural and hatchery subyearling fall chinook salmon released in the Snake River (2) investigate relationships. between detection and passage survival probabilities and travel time of subyearling fall chinook salmon and environmental influences such as flow volume and water temperature (3) monitor and evaluate dispersal of hatchery subyearling chinook salmon into nearshore rearing areas used by natural fish and (4) monitor and evaluate travel time to Lower Granite Dam, growth from release in the Snake River to recapture at Lower Granite Dam, ATPase levels of fish recaptured at Lower Granite Dam, and survival from release in the free-flowing Snake River to the tailrace of Lower Granite Dam.
