Growth-temperature relation for young-of-the-year ruffe
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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.
| 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 |
| Google Analytic Metrics | Metrics page |