Abstract
Locations of potential spawning areas for lake trout (Salvelinus namaycush) were predicted in Lake Opeongo, Ontario, Canada using information gained via acoustic telemetry and geographic information system (GIS) technologies. From 1998 to 2000, 18 adult lake trout (mean fork length 553 mm) implanted with acoustic transmitters (battery life 2 years) were manually tracked. For evening fall locations within the erosive zone of the lake (determined using an existing sedimentation model), habitat variables (slope, depth, and effective fetch) were summarised using GIS. Sites selected by lake trout during the spawning window were in areas of mean fetch equal to 1.5 km and mean slope of 10.6% (n = 50 fixes). We used GIS to identify areas that matched the mean habitat criteria and thus locate potential spawning areas. This model correctly identified 19 of 21 known spawning sites, as well as additional sites used by spawning females in an earlier telemetry study. Depths of traditional fall netting sites are shallow compared to areas in which telemetered lake trout were found during evenings of the spawning period (means 3.1 vs. 5.1 m, respectively). Through the use of information on spawning habitat selection gained through telemetry and knowledge of the physical characteristics of the lake, we provide an alternative means of identifying potential spawning habitat for lake trout.
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Flavelle, L.S., Ridgway, M.S., Middel, T.A., McKinley, R.S. (2002). Integration of acoustic telemetry and GIS to identify potential spawning areas for lake trout (Salvelinus namaycush). In: Thorstad, E.B., Fleming, I.A., Næsje, T.F. (eds) Aquatic Telemetry. Developments in Hydrobiology, vol 165. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0771-8_16
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DOI: https://doi.org/10.1007/978-94-017-0771-8_16
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