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Influence of water regulation and water flow on noble crayfish (Astacus astacus) catch in the River Ljungan, Sweden
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (Zooekologi)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.ORCID iD: 0000-0003-1894-6059
2008 (English)In: International association of Astacology, IAA18 konferens in Kuopio, August 2008. / [ed] Japo Jussila, James M. Furse & James W. Fetzner Jr, 2008, 141-144 p.Conference paper, Published paper (Refereed)
Abstract [en]

Free-flowing water is thought to be of importance for reproduction and body growth of noble crayfish, Astacus astacus (Linnaeus), in the northern edge of its distribution area. A hydroelectric power plant with a bypass tunnel was built in the River Ljungan, Sweden, in 1976. This reduced the mean water flow in the old river bed from about 60 m3 s-1 to 3 m3 s-1. The sites with the largest reduction of water flow had the largest decline in catch per unit effort of crayfish. At one site the catches were reduced by > 60%, but the catch success varied between locations. At all sites, water regulation seemed to have an effect, even though catch per unit effort was possibly affected by a number of other factors. © 2010 International Association of Astacology.

Place, publisher, year, edition, pages
2008. 141-144 p.
National Category
Microbiology
Identifiers
URN: urn:nbn:se:miun:diva-8171Scopus ID: 2-s2.0-79956322175ISBN: 978-951271322-6 (print)OAI: oai:DiVA.org:miun-8171DiVA: diva2:133398
Conference
International Association of Astacology Biennual Symposium No 17
Available from: 2009-01-09 Created: 2009-01-09 Last updated: 2016-12-15Bibliographically approved

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