You are here: Home
/ Publication Information
Title: Characteristics of pools used by adult summer steelhead oversummering in the New River, California
Author: Nakamoto, Rodney J.;
Source: Transactions of the American Fisheries Society 123(5): 757-765.
Publication Series: Miscellaneous Publication
Description: Abstract - I assessed characteristics of pools used by oversummering adults of summer steelhead Oncorhynchus mykiss between July and October 1991 in the New River, northwestern California. Most fish occupied channel confluence pools and other pools of moderate size (200-1,200 m 2); these pools had less than 35% substrate embeddedness and mean water depths of about 1.0-1.4 m. Microhabitat occupied during daylight hours included cover provided by bedrock ledges and boulders where water velocity averaged 9.3 cm/s (range, 1-34 cm/s; steelhead densities under this cover were highest at the higher velocities. Fish also occupied areas with riparian shading and waters deeper than 1 m. I observed localized areas of cool water in some of the study pools. The availability of coolwater areas in pools did not increase adult fish use of those pools. The results of this study indicate that the distribution of summer steelhead in the New River during July–October is more strongly controlled by physical habitat characteristics than by the availability of thermal refugia.
Keywords: PSW4351, steelhead, fish, Oncorhynchus mykiss, pools, New River, California
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
XML: View XML
Nakamoto, Rodney J. 1994. Characteristics of pools used by adult summer steelhead oversummering in the New River, California. Transactions of the American Fisheries Society 123(5): 757-765.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility