Hydroacoustic Evaluation of Juvenile Salmonid Fish Passage at The Dalles Dam Fish Attraction Water Units in 1990 PDF Download
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Author: Robert J. Stansell
Publisher:
ISBN:
Category : Fishways
Languages : en
Pages : 58
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Book Description
Author: Robert J. Stansell
Publisher:
ISBN:
Category : Fishways
Languages : en
Pages : 58
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Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 816
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Book Description
Author: Gary E. Johnson
Publisher:
ISBN:
Category : Dalles Dam (Or. and Wash.)
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 470
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Book Description
Author: Gary E. Johnson
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 74
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Book Description
Author: Lisa Mighetto
Publisher:
ISBN:
Category : Anadromous fishes
Languages : en
Pages : 302
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Book Description
Author: Richard N. Williams
Publisher: Elsevier
ISBN: 0080454305
Category : Science
Languages : en
Pages : 720
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Book Description
Return to the River will describe a new ecosystem-based approach to the restoration of salmon and steelhead populations in the Columbia River, once one of the most productive river basins for anadromous salmonids on the west coast of North America. The approach of this work has broad applicability to all recovery efforts throughout the northern hemisphere and general applicability to fisheries and aquatic restoration efforts throughout the world. The Pacific Northwest is now embroiled in a major public policy debate over the management and restoration of Pacific salmon. The outcome of the debate has the potential to affect major segments of the region's economy - river transportation, hydroelectric production, irrigated agriculture, urban growth, commercial and sport fisheries, etc. This debate, centered as it is on the salmon in all the rivers, has created a huge demand for information. The book will be a powerful addition to that debate. - A 15 year collaboration by a diverse group of scientists working on the management and recovery of salmon, steelhead trout, and wildlife populations in the Pacific Northwest - Includes over 200 figures, with four-color throughout the book - Discusses complex issues such as habitat degradation, juvenile survival through the hydrosystem, the role of artificial production, and harvest reform
Author: Brian D. McFadden
Publisher:
ISBN:
Category : Fishways
Languages : en
Pages : 23
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Author:
Publisher:
ISBN:
Category : Estuarine fishes
Languages : en
Pages : 44
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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The objective of this study was to determine detailed vertical, horizontal, intensive, and diel distributions of juvenile salmonid passage at the spillway at The Dalles Dam from April 12 to July16, 2006. These data are being applied in the Spillway Improvements Program to position release pipes for direct injury and mortality studies and to provide baseline data for assessment of the vortex suppression devices scheduled for deployment in 2007. We estimated fish distributions from hydroacoustic data collected with split-beam transducers arrayed across Bays 1 through 9 and 14. Spill at ~20 kcfs per bay was bulked at Bays 1-6, although the other bays were opened at times during the study to maintain a 40% spill percentage out of total project discharge. The vertical distribution of fish was skewed toward the surface during spring, but during summer, passage peaked at 2-3 m above the spillway ogee. Fish passage rates (number per hour) and fish densities (number per kcfs) were highest at Bay 6, followed by passage at Bay 5. This result comports with spillway horizontal distribution data from radio telemetry and hydroacoustic studies in 2004. The vertical and horizontal distribution of fish passage at bays 5 and 6 was much more variable during spring than summer and more variable at bay 5 than bay 6. Diel distribution data revealed that fish passage was highest during 0600-0700 h in spring; otherwise passage was reasonably uniform on a diel basis. This study substantiates the purpose of the spillway vortex suppression device to re-distribute downstream migrants away from Bay 6 toward Bays 1-5.
