Observations of the Behavior and Distribution of Fish in Relation to the Columbia River Navigation Channel and Channel Maintenance Activities

Carlson, Thomas J. ; Ploskey, Gene R. ; Johnson, R. L. ; Mueller, Robert P. ; Weiland, Mark A. ; Johnson, P. N.

Pacific Northwest National Laboratory (U.S.)

关键词: U.S. Army Corps Of Engineers;    Columbia River;    Salmon;    Hydroacoustic;    Dredging;   

DOI  :  10.2172/965655
RP-ID  :  PNNL-13595
RP-ID  :  AC05-76RL01830
RP-ID  :  965655

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report is a compilation of 7 studies conducted for the U.S. Army Corps of Engineers between 1995 and 1998 which used hydroacoustic methods to study the behavior of migrating salmon in response to navigation channel maintenance activities in the lower Columbia River near river mile 45. Differences between daytime and nighttime behavior and fish densities were noted. Comparisons were made of fish distribution across the river (in the channel, channel margin or near shore) and fish depth upstream and downstream of dikes, dredges, and pile driving areas.