Comparison of several techniques for mobility and activity estimates of smallmouth bass in lentic environments |
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Authors: | S. J. Cooke C. M. Bunt J. F. Schreer D. H. Wahl |
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Affiliation: | Department of Biology, University of Waterloo, Waterloo, Ontario, N2L 3G1 Canada;Center for Aquatic Ecology, Illinois Natural History Survey, Champaign, Illinois 61820, U.S.A. |
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Abstract: | Mean daily mobility estimates for smallmouth bass Micropterus dolomieu from mark-recapture (47·5±12·5 m) were less than from conventional telemetry (77·1±10·6 m). The relationship developed in a respirometer between the activity transmitter and swimming speed ( r 2=0·99, P < 0·001, n =6) when applied to field activity data estimated mean daily movement at 27 408±4085 m, i.e. >100 times mark/recapture or telemetry estimates. Using these estimates in the activity parameter of a bioenergetics model resulted in different model outputs. These results highlight the potential underestimates in activity associated with using traditional mark-recapture and locational telemetry and reaffirm that fish expend a significant portion of their activity budgets undertaking localized movements. |
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Keywords: | smallmouth bass movement telemetry anchor tags EMGi activity bioenergetics |
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