thumbnail

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

Transactions of the American Fisheries Society

None
By:
DOI: 10.1577/1548-8659(1990)119<0996:EOLTSO>2.3.CO;2

Links

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.

Additional Publication Details

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
Number of Pages:
7