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Landlocked atlantic salmon in a large river-lake ecosystem: Managing an endemic, large-bodied population of high conservation value
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences (from 2013).ORCID iD: 0000-0002-3191-7140
Gammelkroppa Lax AB.
County Administrative Board of Värmland.
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences (from 2013).ORCID iD: 0000-0003-2220-1615
2021 (English)In: Canadian Journal of Fisheries and Aquatic Sciences, ISSN 0706-652X, E-ISSN 1205-7533, Vol. 78, no 6, p. 787-796Article in journal (Refereed) Published
Abstract [en]

Managing and conserving threatenedmigratory salmonid populations in large river-lake ecosystems is challenging not only because of the ecosystems’ large size, but also because there is often more than one anthropomorphic stressor. The River Klarälven - Lake Vänern ecosystem, situated in Norway and Sweden, is a large, highly modified ecosystem, home to a threatened, endemic, large-bodied population of landlocked Atlantic salmon (Salmo salar). With 11 dams, the salmon population has been maintained through extensive stocking and a truck and transport system for spawners. Here we review what we have learned about the salmon after 15 years of research, highlighting the major findings for each life stage. Our studies indicate that the salmon population is below carrying capacity, and we suggest measures to increase the number of spawners and downstream passage success. Habitat restoration to compensate for losses from former log-driving activities is expected to further increase carrying capacity. Re-establishing salmon in Klarälven’s upper reaches in Norway, while possible, is fraught with both ecological and legislative hurdles. Substantial long-termfunding is needed to foster co-management and ensure a sustainable fishery.

Place, publisher, year, edition, pages
Canadian Science Publishing , 2021. Vol. 78, no 6, p. 787-796
Keywords [en]
anthropogenic effect, conservation status, echinoderm fishery, endangered species, endemic species, fishery, fishery management, lake ecosystem, salmonid, sustainability, Klar River, Norway, Salmo salar, Salmonidae
National Category
Ecology
Research subject
Biology
Identifiers
URN: urn:nbn:se:kau:diva-85361DOI: 10.1139/cjfas-2020-0163ISI: 000672233700015Scopus ID: 2-s2.0-85107480203OAI: oai:DiVA.org:kau-85361DiVA, id: diva2:1577505
Available from: 2021-07-02 Created: 2021-07-02 Last updated: 2022-01-13Bibliographically approved

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