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A simple management tool for planning the restoration of river longitudinal connectivity at watershed level: priority indexes for fish passes
Karlstad University, Faculty of Social and Life Sciences, Department of Biology. (Naturresurs rinnande vatten)ORCID iD: 0000-0002-8738-8815
2009 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The fragmentation of the longitudinal connectivity of rivers due to man-made obstacles causes relevant impacts upon fish migrations and therefore the reopening of fish migration routes through the construction of fish passes is a key issue which should be planned at watershed level. The competent watershed Authorities need to prioritize the interventions, addressing the often limited resources to the sites where the construction of a fish pass can have the higher benefit/cost ratio. The present study was therefore aimed at identifying a simple management tool, based on already available or easily collectable data, which could support and address decisional processes in watershed planning. The proposed priority indexes for fish passes, based on obstacle characteristics, length of the potential reopened reach and fish species distribution and migratory capabilities, were tested in 2 Italian watershed (Arno and Magra rivers) over a total river length of more than 400 km. The results (priority lists) coming from the application of such indexes can be considered a preliminary step for the definition of a restoration plan which could help the competent Authorities to address the available resources towards more detailed studies to be carried out at sites classified with the higher priority levels. This is the case of the Regional Natural Park Monte Marcello-Magra, where within a LIFE+ project (P.A.R.C. Petromyzon And River Continuity) recently funded, the first results of the priority indexes application will be analyzed in greater detail and will consequently lead to the design and construction of fish passes with a particular focus on sea lamprey (Petromyzon marinus) migration routes restoration

Place, publisher, year, edition, pages
Düsseldorf, Germany, 2009.
National Category
Biological Sciences
Research subject
Biology
Identifiers
URN: urn:nbn:se:kau:diva-11184OAI: oai:DiVA.org:kau-11184DiVA, id: diva2:494753
Conference
International Workshop on the Restoration of Fish Populations
Available from: 2012-02-08 Created: 2012-02-08 Last updated: 2019-07-12Bibliographically approved

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