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Early microhabitat use by age 0 year brook charr Salvelinus fontinalis in lakes

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The early habitat use of age 0 year brook charr Salvelinus fontinalis in three north temperate lakes which differ in terms of shoreline physical habitat is described. In the two lakes, which contained abundant shoreline woody debris and inundated vegetation, brook charr were observed in extremely close proximity with these habitat features, near shore and near the surface. Fish were absent from open areas away from shore unless in close proximity with fallen floating logs near the surface, extending offshore. In a third lake that had no woody debris or inundated shoreline vegetation, brook charr were observed exclusively in close proximity with the shoreline itself, and near the surface. In all three lakes, fish were most closely associated with the shoreline and with woody debris and inundated vegetation (when present) shortly after emergence, and significantly farther from shore and deeper in the water column thereafter.
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Keywords: habitat; habitat selection; nearshore; riparian; woody debris

Document Type: Regular Paper

Affiliations: 1: School of Biological Sciences, University of Sydney, Sydney NSW 2007, Australia 2: Harkness Laboratory of Fisheries Research, Aquatic Research and Development Section, Ontario Ministry of Natural Resources, Trent University, 2140 East Bank Drive Peterborough, Ontario, K9J 7B8 Canada

Publication date: 2008-07-01

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