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Evaluation of nature-like fishways for re-establishing connectivity in fragmented salmonid populations in the River Emån
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences.
Karlstad University, Faculty of Social and Life Sciences, Department of Biology.ORCID iD: 0000-0002-3191-7140
2005 (English)In: Rivers Research and Applications: an international journal devoted to river research and management, ISSN 1535-1459, E-ISSN 1535-1467, Vol. 21, no 9, 951-960 p.Article in journal (Refereed) Published
Abstract [en]

We evaluated the function of two nature-like fishways for re-establishing connectivity for anadromous salmonids in the regulated River Eman. Between 90 and 100% of the salmonids that entered the fishways actually passed through them, with median speeds of 180-190 m h(-1). Only 50% of the anadromous brown trout that passed the first fishway also passed the second one, indicating that the fish might have had problems locating the upstream fishway. The fishways were also observed to function as a passage for downstream post-spawning migrants. The densities of brown trout yearlings upstream of the fishways were higher in 2002, after the fishways were built, than during pre-fishway years. In control sites in other parts of the river as well as in a nearby river, no changes in yearling densities were observed. Thus, the fishways are working for upstream spawners, albeit at a recolonization rate that is slower than expected. Copyright (c) 2005 John Wiley & Sons, Ltd

Place, publisher, year, edition, pages
John Wiley & Sons , 2005. Vol. 21, no 9, 951-960 p.
Keyword [en]
regulated river, connectivity, nature-like fishway, passage efficiency, passive integrated transponder, anadromous brown trout, remedial measure
National Category
Biological Sciences
Research subject
Biology
Identifiers
URN: urn:nbn:se:kau:diva-19059DOI: 10.1002/rra.865ISI: 000233478700001OAI: oai:DiVA.org:kau-19059DiVA: diva2:592701
Projects
Fiskvägar och flödesregimåtgärder i reglerade vatten: konsekvenser för vattendragets produktivitet och för samhällsnyttan
Note

Distrubution: olle.calles@kau.se

Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2015-11-12Bibliographically approved

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Publisher's full texthttp://www3.interscience.wiley.com/cgi-bin/jissue/112133414http://www3.interscience.wiley.com/cgi-bin/fulltext/110575636/PDFSTART

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