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Effects of Fall-to-Winter Changes in Habitat and Frazil Ice on the Movements and Habitat Use of Juvenile Rainbow Trout in a Wyoming Tailwater

2000; Wiley; Volume: 129; Issue: 1 Linguagem: Inglês

10.1577/1548-8659(2000)129 2.0.co;2

1548-8659

Darin G. Simpkins, Wayne A. Hubert, Thomas A. Wesche,

Marine and fisheries research

Transactions of the American Fisheries SocietyVolume 129, Issue 1 p. 101-118 Article Effects of Fall-to-Winter Changes in Habitat and Frazil Ice on the Movements and Habitat Use of Juvenile Rainbow Trout in a Wyoming Tailwater Darin G. Simpkins, Corresponding Author Darin G. Simpkins [email protected] U.S. Geological Survey, Wyoming Cooperative Fish and Wildlife Research Unit, University of Wyoming, Laramie, Wyoming, 82071-3166 USA[email protected]Search for more papers by this authorWayne A. Hubert, Wayne A. Hubert U.S. Geological Survey, Wyoming Cooperative Fish and Wildlife Research Unit, University of Wyoming, Laramie, Wyoming, 82071-3166 USASearch for more papers by this authorThomas A. Wesche, Thomas A. Wesche Department of Renewable Resources, University of Wyoming, Laramie, Wyoming, 82071-3354 USASearch for more papers by this author Darin G. Simpkins, Corresponding Author Darin G. Simpkins [email protected] U.S. Geological Survey, Wyoming Cooperative Fish and Wildlife Research Unit, University of Wyoming, Laramie, Wyoming, 82071-3166 USA[email protected]Search for more papers by this authorWayne A. Hubert, Wayne A. Hubert U.S. Geological Survey, Wyoming Cooperative Fish and Wildlife Research Unit, University of Wyoming, Laramie, Wyoming, 82071-3166 USASearch for more papers by this authorThomas A. Wesche, Thomas A. Wesche Department of Renewable Resources, University of Wyoming, Laramie, Wyoming, 82071-3354 USASearch for more papers by this author First published: 09 January 2011 https://doi.org/10.1577/1548-8659(2000)129 2.0.CO;2Citations: 29 The Unit is jointly supported by the University of Wyoming, Wyoming Game and Fish Department, U.S. Geological Survey, and Wildlife Management Institute. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Overwinter declines in the abundance of small rainbow trout Oncorhynchus mykiss have been observed in a section of the Big Horn River that lies downstream from Boysen Reservoir, where reservoir releases prevent surface ice formation. To provide insight into the possible causes of these declines in abundance, radiotelemetry was used to determine movement and microhabitat use of juvenile (20–25 cm total length) rainbow trout during the fall and winter of 1995–1996. Throughout the fall and winter, both stocked (hatchery) and naturally spawned (wild) fish were generally found in main-channel pools with cover that reduced current velocities to less than 2 cm/s near the bottom and with nearby (<2 m) water velocities that were greater than 15 cm/s. These locations provided refuges from the current, with adjacent flowing water that could deliver drifting aquatic invertebrates. The fish were generally associated with cover that was formed by aquatic vegetation early in the fall, but they shifted to cobble and boulder cover (in deeper water) as the aquatic vegetation decomposed and as winter progressed. Episodes of frazil ice in January and early February were associated with movements of wild fish in the upstream portion of the study area—from normal activity areas to refuges at the bottom of deep pools or under shelf ice in shallow water near shore. Frazil-ice episodes often initiated long-term movements among fish. Our results suggest that changing habitat features from fall to winter and frazil-ice episodes can cause juvenile rainbow trout to move and to modify their habitat use, depending on their location in a tailwater. References Analytical Software., 1995. In STATISTIX 4.1 manual., Analytical Software, Tallahassee, Florida. Google Scholar R. A. Bachman, 1984 Foraging behavior of free-ranging wild and hatchery brown trout in a stream., Transactions of the American Fisheries Society, 113, Pages 1–32. 10.1577/1548-8659(1984)113 2.0.CO;2 Web of Science®Google Scholar D. M. Baltz, B. Vondracek, L. R. Brown and P. B. 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Google Scholar Citing Literature Volume129, Issue1January 2000Pages 101-118 ReferencesRelatedInformation