Habitat use and fish activity of landlocked Atlantic salmon and brook charr in a newly developed habitat compensation facility |
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Authors: | Eva C Enders Karen E Smokorowski Curtis J Pennell Keith D Clarke Brent Sellars David A Scruton |
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Institution: | (1) Ecological Sciences Section, Fisheries and Oceans Canada, 80 East White Hills Road, P. O. Box 5667, A1C 5X1 St. John’s, NL, Canada;(2) Great Lakes Laboratory for Fisheries and Aquatic Sciences, Fisheries and Oceans Canada, 1 Canal Drive, P6A 6W4 Sault Ste. Marie, ON, Canada;(3) Newfoundland and Labrador Hydro, Columbus Drive, P. O. Box 12400, A1B 4K7 St. John’s, NL, Canada |
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Abstract: | Degradation and destruction of valuable spawning and rearing habitat due to anthropogenic changes (e.g., flow modification
and channelisation) is known to have dramatic impacts on fish populations. To compensate for habitat losses due to hydropower
development, an artificial fluvial habitat channel (‘Compensation Creek’) was constructed in south-central Newfoundland, Canada.
The creek was designed to include appropriate habitat features for the two dominant salmonid fish species, landlocked Atlantic
salmon (Salmo salar L.) and brook charr (Salvenius fontinalis Mitchell). The study examines the habitat use of landlocked Atlantic salmon and brook charr in the Compensation Creek using
electromyogram (EMG) radio telemetry. Ten landlocked Atlantic salmon and eight brook charr were captured and tagged with EMG
transmitters. In laboratory swimming experiments, the EMG values were calibrated against swimming speed. Fish were then released
in the Compensation Creek and tracked on a daily basis. The results show that (1) during residence in the creek, both species
used preferentially the habitat features designed to match their rearing habitat preferences, and (2) swimming speed did not
vary among habitat types for either species. |
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Keywords: | Habitat restoration Fish activity Spawning EMG radio telemetry Salmonid |
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