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Growth-temperature relation for young-of-the-year ruffe

Journal of Great Lakes Research

By:
, , , and
DOI: 10.1016/S0380-1330(93)71247-2

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Abstract

The ruffe (Gymnocephalus cernuus) was accidentally introduced into the Great Lakes basin from Eurasia and has established a breeding population in the St. Louis River, a major tributary to western Lake Superior. We captured young-of-the-year ruffe in the St. Louis River; acclimated groups of 90-91 fish to test temperatures of 7, 10, 15, 20, and 25°C; and fed them ad libitum for 42 days at those temperatures. Ruffe grew at all five temperatures, but the optimum temperature for growth was about 21°C. Because the optimum temperature for growth of walleye (Stizostedion vitreum), sauger (Stizoste-dion canadense), and yellow perch (Perca flavescens) is about 22°C, ruffe will probably attempt to share their thermal habitat. A recent survey of the St. Louis River revealed that yellow perch and small forage fish declined sharply as ruffe abundance increased. A similar decline in yellow perch abundance in Lakes Michigan, Huron, and Erie would seriously affect the fisheries in these lakes.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Growth-temperature relation for young-of-the-year ruffe
Series title:
Journal of Great Lakes Research
DOI:
10.1016/S0380-1330(93)71247-2
Volume:
19
Issue:
3
Year Published:
1993
Language:
English
Publisher:
Elsevier
Contributing office(s):
Great Lakes Science Center
Description:
4 p.
First page:
630
Last page:
633
Online Only (Y/N):
N
Additional Online Files (Y/N):
N