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Swimming performance and metabolism of 0+ year Thymallus arcticus

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The prolonged swimming speed and metabolic rate of 0+ year Arctic grayling Thymallus articus were examined with respect to current velocity, water temperature and fish size, and compared to conditions fish occupy in the river. Oxygen consumption (mg O2 h−1) increased with fish mass and temperature (6–23° C), with a steep increase in metabolic rate between 12 and 16° C. Absolute prolonged swimming speed (cm s−1) increased rapidly with fish size (total length, LT, and mass), however, fish in the natural stream habitat occupied current velocities between 15 and 25 cm s−1 or 4 LT s−1, approximately half their potential prolonged swimming speed (10 LT s−1).
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Keywords: fish metabolism; habitat use; swimming performance

Document Type: Regular Paper

Affiliations: 1: The Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA 02543, U.S.A., 2: Institute of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901, U.S.A. and 3: Lockeed Martin/REAC, 2890 Woodbridge Avenue, Edison, NJ 08837, U.S.A.

Publication date: 2005-10-01

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