Mainstem Clearwater River study: Assessment for Salmonid Spawning, Incubation, and Rearing.

Abstract

our fishery technicians, subjected themselves to long work days and physically trying weather conditions. Kendall Jackson provided additional field assistance when called upon. David Statler provided valuable technical assistance and reviewed manuscripts. John Knutzen, Scott Wilcox, and Ken Winnick assisted during the collection of hydraulic crosssection data and Lisa Russel summarized and entered these data into data base format. Vance Penton assisted in designing and fabricating our freeze-core equipment. Greg Delwitch, Jeff Hanson, Ed Kim, and Mark Lindgren of the U.S. Army Corps of Engineers coordinated controlled dam flows, which were essential to our study. Numerous employees of the U.S. Geological Survey transferred gaging station data to our project personnel. Bill Miller, Travis Coley, and Ralph Roseberg of the U.S. Fish and Wildlife Service, Idaho Fishery Resource Office furnished equipment and were always available for technical questions. Ed Buettner and Lance Nelson of the Idaho Department of Fish and Game assisted in PIT-tagging and Jeff Earhart provided computer uploading assistance. Judy Cress of the Pacific States Marine Fisheries Commission provided computer training and assistance in retrieving PIT tag information. The U.S. Forest Service provided substrate sieves and other equipment when needed. Meetings were held for purposes of peer review and interagency coordination.

Post-Release Attributes and Survival of Hatchery and Natural Fall Chinook Salmon in the Snake River : Annual Report 1999.

“…The emergence date of each fish was back calculated based on fork length at capture, mean observed growth rate (W. P. Connor, unpublished data), and a mean fork length of 38 mm at emergence (Arnsberg et al 1992). The data was grouped into three cohorts per year to approximate the life history of fish from the three spawning areas described previously.…”

Coho Salmon Master Plan, Clearwater River Basin.

“…Dworshak Dam lacks fish passage, resulting in the permanent loss of productive salmonid spawning aggregates and high quality habitat. The lower Clearwater River temperature regime continues to be altered by Dworshak Dam, resulting in warmer water in the winter and cooler water in the summer (Arnsberg et al 1992, Arnsberg andStatler 1995).…”

Nez Perce Tribal Hatchery Program : Draft Environmental Impact Statement.

“…The fish component of the mainstem Clearwater River has been evaluated in recent studies by the Nez Perce Tribe (Connor, 1989, andArnsberg, et al, 1992). Connor (1 989) reported that, in 1989, chinook parr were uncommon.…”