Skip to Main Content
Characteristics of pools used by adult summer steelhead oversummering in the New River, CaliforniaAuthor(s): Rodney J. Nakamoto
Source: Transactions of the American Fisheries Society 123(5): 757-765.
Publication Series: Miscellaneous Publication
PDF: View PDF (188 KB)
DescriptionAbstract - 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.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- 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.
CitationNakamoto, 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.
KeywordsPSW4351, steelhead, fish, Oncorhynchus mykiss, pools, New River, California
- Water velocity influences prey detection and capture by drift-feeding juvenile coho salmon (Oncorhynchus kisutch) and steelhead (Oncorhynchus mykiss irideus)
- Temperature-dependent interactions between juvenile steelhead and Sacramento pikeminnow in laboratory streams
- Effects of steelhead density on growth of Coho salmon in a small coastal California stream
XML: View XML