2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2018 | 2:45 PM - 3:00 PM | SPATIAL AND TEMPORAL MOVEMENTS OF BROOK TROUT IN A SOUTHERN LAKE SUPERIOR TRIBUTARY | 430 B
SPATIAL AND TEMPORAL MOVEMENTS OF BROOK TROUT IN A SOUTHERN LAKE SUPERIOR TRIBUTARY
A migratory life-history form of Brook Trout, Salvelinus fontinalis, known as Coasters, flourished in Lake Superior until the early 1900s. In Michigan tributaries, only one viable population is confirmed, although unidentified populations may persist. Restoration efforts are limited by this lack of data on existing populations. The Pilgrim River in Houghton County, Michigan flows into the Keweenaw waterway of Lake Superior and is known to support a robust Brook Trout population, however no data exist on possible movements between the river and lake habitats. We implanted Brook Trout in the Pilgrim River with PIT tags and operated four antenna stations to monitor their movements. Since 2014, we have tagged approximately 450 Brook Trout ranging from 15 to 420cm total length. We have documented extensive in-river movements of up to 14 kilometers and movements from the Pilgrim River into the Keweenaw waterway. At least 20 individuals made a complete late fall-winter outmigration and adfluvial spring return, thus displaying the Coaster life history. Documenting Coasters in the Pilgrim River and understanding how existing habitat is being utilized is important to justify and inform management actions aimed at preserving and expanding Coaster populations.
- Life History
- Behavior
- Watershed
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Presenters/Authors
Christopher Adams
(), Michigan Technological University, ccadams@mtu.edu;
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Casey Huckins
(), Michigan Technological University, cjhuckin@mtu.edu;
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Amy Marcarelli
(), Michigan Technological University, ammarcar@mtu.edu;
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