Evidence of repeated long-distance movements by lake charr Salvelinus namaycush in Lake Huron

Environmental Biology of Fishes
By: , and 

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Abstract

Movements and dispersal distances of acoustically-tagged adult lake charr Salvelinus namaycush were estimated based on detections at acoustic receivers in Lake Huron during 2010–2014. Most lake charr were detected only at receivers proximate to their release location or were not detected at all, but 3–9% of tagged lake charr were detected at receivers located over 100 km from their release location. Several fish made extensive repeated migrations within the lake, some at the scale of the entire main basin. Our observations show that some lake charr individuals repeat a similar pattern each year of moving long distances, and some fish were observed to show annual fidelity to presumed foraging sites in the spring at a spatial scale of approximately 200 km. Our telemetry-based estimates were minimum estimates of dispersal, as the placement of receivers within Lake Huron was not optimal for detection of lake charr and did not cover the majority of the lake. Further study of long-distance movement in lake charr is necessary to fully understand the implications of this behavior to lake charr ecology, population dynamics, and management in the Great Lakes.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Evidence of repeated long-distance movements by lake charr Salvelinus namaycush in Lake Huron
Series title Environmental Biology of Fishes
DOI 10.1007/s10641-018-0714-6
Volume 101
Issue 4
Year Published 2019
Language English
Publisher Springer
Contributing office(s) Great Lakes Science Center
Description 15 p.
First page 531
Last page 545
Country United States, Canada
Other Geospatial Lake Huron