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

Technical Report ·
DOI:https://doi.org/10.2172/6823284· OSTI ID:6823284
This is the second annual progress report for studies conducted by the Nez Perce Tribe to evaluate the potential for increasing fall chinook salmon (Oncorhynchus tshawytscha) populations and establishing summer chinook salmon spawning in the lower 57.5 km of the mainstem Clearwater River (LMCR) of Idaho. The report presents study methods and preliminary results for the 1988--1989 phase of the study. The overall study plan was designed to quantitatively evalulate the available spawning, incubation and rearing habitat for fall and summer chinook salmon. We also studied steelhead trout (O. mykiss) rearing habitat since there is a stable population of these fish in the LMCR's tributaries and their parr are known to rear periodically in the mainstem. Resident fish were studied to assess the potential for habitat overlap with that of anadromous fish. Based on these findings the Nez Perce Tribe could determine chinook salmon habitat conditions for selected stocks under existing flow and temperature regimes and consult with the US Army Corps of Engineering concerning the effects of Dworshak Dam operation on flows and measures to restore or establish stocks identified in this study. 38 refs., 25 figs., 4 tabs.
Research Organization:
Nez Perce Tribe Dept. of Fisheries Management (USA); EBASCO Environmental (USA)
Sponsoring Organization:
United States. Bonneville Power Administration.
DOE Contract Number:
AI79-87BP37474
OSTI ID:
6823284
Report Number(s):
DOE/BP-37474-2; ON: DE91000156
Country of Publication:
United States
Language:
English