Evidence of a Year-Round Resident Population of Lake Sturgeon in the Kettle River, Minnesota, Based on Radiotelemetry and Tagging

Autor: Heath T. Weaver, Larry M. Schwarzkopf, Al T. Linder, Roger A. Hugill, Mark J. Zacher, John A. Frank, Brian D. Borkholder, Stephen D. Morse, Terry E. Perrault
Rok vydání: 2002
Předmět:
Zdroj: North American Journal of Fisheries Management. 22:888-894
ISSN: 1548-8675
0275-5947
DOI: 10.1577/1548-8675(2002)022<0888:eoayrr>2.0.co;2
Popis: We used radiotelemetry to study the movement of lake sturgeon Acipenser fulvescens in the Kettle River of east-central Minnesota. Our objectives were to determine whether the tracked fish were seasonal or year-round residents of the river and to determine their seasonal movements, responses to changes in discharge, and activity centers. We were also interested in the response of these fish to the removal of a hydroelectric dam that had blocked upstream movement of fish for 87 years. Eight fish received transmitter implants and were tracked for about 7 months, from October 1994 through May 1995. Three tagged fish were not identified or located thereafter, but the remaining five were tracked weekly from April 1995 to September 1996. Lake sturgeon did not move upstream of the former hydroelectric dam or downstream of the Kettle River's confluence with the St. Croix River but rather remained within this 20-mi reach, despite the absence of physical barriers at either end. We found that sturgeon moveme...
Databáze: OpenAIRE
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