Evaluation of juvenile fall chinook salmon passage through the McNary Dam juvenile fish bypass system to identify areas of delay
By: Gordon A. Axel ... [et al.].
Contributors: Axel, Gordon A.; United States. Army. Corps of Engineers. Walla Walla District.; Northwest Fisheries Science Center (U.S.). Fish Ecology Division.
Publisher: Fish Ecology Division, Northwest Fisheries Science Center, National Marine Fisheries Service
Published: 2002
Place of publication: Seattle, Wash
Language: eng
Number of pages: 20
Subjects: Chinook salmon -- Migration -- Columbia River.; Fishways -- Columbia River.; Chinook salmon -- Effect of dams on -- Columbia River.; McNary Dam (Or. and Wash.)
First sentence: Fish diversion from turbine passage is an important component in increasing survival for juvenile salmonid migrants at hydroelectric dams in the Columbia River Basin (Iwamoto et al. 1994; Muir et al. 1995, 1996).
Description: In 2001, the National Marine Fisheries Service completed the second year of a study to evaluate travel times of juvenile subyearling chinook salmon Oncorynchus tshawytscha in the bypass system at McNary Dam.    The first year of study indicated a delay associated with passage through the juvenile fish bypass system:   median residence times within the Unit 8A gatewell were 2.8 hours.    During 2001, radiotelemetry receivers were deployed to determine areas of delay within the gatewell, collection channel, and separator.     River-run subyearling chinook salmon were collected and radio tagged at the McNary Dam juvenile fish collection facility, released into gatewells of three turbine units, and monitored as they passed through the bypass system.    All of the 261 radio-tagged fish released were detected as they passed through the bypass system and exited the separator.    Median residence time in Gatewells 8A, 10A, and 13A was 8.6, 2.6, and 3.7 hours, respectively.    This accounted for 90-98% of total  travel time through the juvenile bypass system.
Notes: "December 2002."

Report of research to U.S. Army Corps of Engineers, Walla Walla District, Contract W68SBV10182878.

Includes bibliographical references (p. 19-20).
Table of contents: pagenum: iii
class: section
title: EXECUTIVE SUMMARY; pagenum: 1
class: part
title: INTRODUCTION; pagenum: 2
class: part
title: METHODS; pagenum: 2
class: part
title: Study Area; pagenum: 2
class: part
title: Radio Tags; pagenum: 2
class: part
title: Test Fish and Tagging Protocol; pagenum: 5
class: part
title: Release Protocol; pagenum: 5
class: part
title: Monitoring of Radio-Tagged Fish; pagenum: 6
class: part
title: Statistical Analysis; pagenum: 6
class: part
title: RESULTS AND DISCUSSION; pagenum: 17
class: part
title: RECOMMENDATIONS; pagenum: 18
class: part
title: ACKNOWLEDGMENTS; pagenum: 19
class: part
title: REFERENCES