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Movements of hatchery-reared lake trout in Lake Superior

Journal of the Fisheries Research Board of Canada

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Abstract

The history of stocking of lake trout (Salvelinus namaycush) in the Great Lakes is reviewed. The study of movements is based on capture of 24,275 fin-clipped lake trout taken in experimental gill nets and trawls and commercial gill nets. Yearling lake trout planted from shore dispersed to 15-fath (27-m) depths in 3A? hr. Most fish remained within 2 miles (3.2 km) of the planting site 2 months, but within 4 months some fish had moved as much as 17 miles (27 km). The highest abundance of planted lake trout was in areas 2-4 miles (3.2-6.4 km) from the planting site even 3 years after release. Distance moved and size of fish were not correlated. Dispersal of lake trout begins at planting and probably continues until the fish are mature. Most movement was eastward in southern Lake Superior and followed the counterclockwise surface currents. Movement is most rapid in areas of strong currents and slowest in areas of weak currents or eddies. Movement to areas west of the Keweenaw Peninsula was insignificant from plantings in Keweenaw Bay and nil from other plantings farther east. Lake trout planted in the eastern third of the lake dispersed more randomly than those planted farther west. Few fish moved farther offshore than the 50-fath (91-m) contour. Lake trout planted in Canadian waters made insignificant contributions to populations in US waters.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Movements of hatchery-reared lake trout in Lake Superior
Series title:
Journal of the Fisheries Research Board of Canada
Volume
22
Issue:
4
Year Published:
1965
Language:
English
Contributing office(s):
Great Lakes Science Center
Description:
p. 999-1024
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of the Fisheries Research Board of Canada
First page:
999
Last page:
1024
Number of Pages:
25