Portal de Periódicos da CAPES

Lake Trout Spawning in Lake Tahoe: Egg Incubation in Deepwater Macrophyte Beds

1992; Wiley; Volume: 12; Issue: 3 Linguagem: Inglês

10.1577/1548-8675(1992)012 2.3.co;2

1548-8675

David A. Beauchamp, Brant C. Allen, Robert C. Richards, Wayne A. Wurtsbaugh, Charles R. Goldman,

Marine and fisheries research

North American Journal of Fisheries ManagementVolume 12, Issue 3 p. 442-449 Article Lake Trout Spawning in Lake Tahoe: Egg Incubation in Deepwater Macrophyte Beds David A. Beauchamp, David A. Beauchamp Department of Fisheries and Wildlife, Utah State University, Logan, Utah, 84322 USASearch for more papers by this authorBrant C. Allen, Brant C. Allen University of California-Davis, Tahoe Research Group, Post Office Box 633, Tahoe City, California, 95730 USASearch for more papers by this authorRobert C. Richards, Robert C. Richards University of California-Davis, Tahoe Research Group, Post Office Box 633, Tahoe City, California, 95730 USASearch for more papers by this authorWayne A. Wurtsbaugh, Wayne A. Wurtsbaugh Department of Fisheries and Wildlife, and Ecology Center, Utah State University, USASearch for more papers by this authorCharles R. Goldman, Charles R. Goldman Division of Environmental Studies, University of California, Davis, California, 95616 USASearch for more papers by this author David A. Beauchamp, David A. Beauchamp Department of Fisheries and Wildlife, Utah State University, Logan, Utah, 84322 USASearch for more papers by this authorBrant C. Allen, Brant C. Allen University of California-Davis, Tahoe Research Group, Post Office Box 633, Tahoe City, California, 95730 USASearch for more papers by this authorRobert C. Richards, Robert C. Richards University of California-Davis, Tahoe Research Group, Post Office Box 633, Tahoe City, California, 95730 USASearch for more papers by this authorWayne A. Wurtsbaugh, Wayne A. Wurtsbaugh Department of Fisheries and Wildlife, and Ecology Center, Utah State University, USASearch for more papers by this authorCharles R. Goldman, Charles R. Goldman Division of Environmental Studies, University of California, Davis, California, 95616 USASearch for more papers by this author First published: August 1992 https://doi.org/10.1577/1548-8675(1992)012 2.3.CO;2Citations: 16AboutPDF 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 onFacebookTwitterLinkedInRedditWechat Abstract –Although most populations of lake trout Salvelinus namaycush spawn over rocky shoals, use of these substrates by lake trout has not yet been found in Lake Tahoe. Large cobble substrate exists at depths less than 20 m, and steep, fractured, rocky substrate can be found in isolated areas from the surface down to at least 100 m, but no evidence of spawning activity in these areas has been found. Instead, at least a portion of the population spawns on deepwater mounds (40–60 m deep) over beds of the macrophyte Chara delicatula. This is the first known report of lake trout spawning over macrophyte beds. We hypothesize that this population originated from a deep-spawning stock and that the macrophyte beds on these mounds may provide some of the best deepwater incubation habitat in the lake, Although egg predation by intermediate sizes of lake trout (375–500 mm fork length) was substantial, the mounds appeared to be a refuge from the potentially more effective invertebrate and small vertebrate egg predators. The oxygen and temperature regime within the macrophytes was suitable for egg development, and the eggs that infiltrated deeply among the plant strands were anchored against currents and were presumably protected from further predation by lake trout. Citing Literature Volume12, Issue3August 1992Pages 442-449 RelatedInformation