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Effect of size on lake trout survival after a single sea lamprey attack

Transactions of the American Fisheries Society
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https://doi.org/10.1577/1548-8659(1990)119<0996:EOLTSO>2.3.CO;2

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Abstract

When lake trout Salvelinus namaycush were subjected to a single attack by a sea lamprey Petromyzon marinus in laboratory tests in 1986, percentage mortality was significantly higher in small fish (64%; 469-557 mm; N = 67) than in medium (44%; 559-643 mm; N = 45) or large fish (43%; 660-799 mm; N = 47). Additional studies conducted in 1987 with 55 medium (559-650 mm) and 52 large (660-825 mm) lake trout confirmed that there was no difference in mortality between the two larger size-groups. Mortality declined in lake trout over 559 mm, but was still greater than 43%. This level of mortality and the sea lampreys' apparently active selection of larger fish indicated that, contrary to previously published opinions, large size in lake trout (up to ∼800 mm in length) might not allow better survival from single sea lamprey attacks.

Suggested Citation

Swink, W.D., 1990, Effect of size on lake trout survival after a single sea lamprey attack: Transactions of the American Fisheries Society, v. 119, no. 6, p. 996-1002, https://doi.org/10.1577/1548-8659(1990)119<0996:EOLTSO>2.3.CO;2.

Publication type Article
Publication Subtype Journal Article
Title Effect of size on lake trout survival after a single sea lamprey attack
Series title Transactions of the American Fisheries Society
DOI 10.1577/1548-8659(1990)119<0996:EOLTSO>2.3.CO;2
Volume 119
Issue 6
Year Published 1990
Language English
Publisher Taylor & Francis
Publisher location Philadelphia, PA
Contributing office(s) Upper Midwest Environmental Sciences Center
Description 7 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Transactions of the American Fisheries Society
First page 996
Last page 1002
Additional publication details