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Wetlands for northern pike (Esox lucius L.) recruitment in the Baltic Sea
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science.
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science.
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science.ORCID iD: 0000-0003-0344-1939
2014 (English)In: Hydrobiologia, ISSN 0018-8158, E-ISSN 1573-5117, Vol. 721, no 1, p. 145-154Article in journal (Refereed) Published
Abstract [en]

In recent decades, wetlands have been constructed or restored around the Baltic sea to counteract the eutrophication of its coastal waters. Some of these wetlands could also be suitable spawning and nursery areas for anadromous northern pike (Esox lucius L.). We studied juvenile pike production in three coastal wetlands along the south-eastern coast of Sweden that were restored in different ways. Where terrestrial vegetation was temporarily flooded, pike larval/juvenile emigration increased from a few thousand individuals before restoration to over a hundred thousand afterwards. We suggest that vegetation was the key to this successful reproduction, as wetlands where vegetation was removed or reduced saw no similar increase in pike production. Flooded vegetation in shallow waters offers optimal spawning conditions, increased food resources, and refuge from predation. The growth and emigration of larvae and juveniles were followed over time, revealing that 80-95% of individuals left the wetlands within 1 month (at a size < 6 cm). This emigration probably represents an adaption to seasonally decreasing water levels but may also be a way to avoid cannibalism.

Place, publisher, year, edition, pages
2014. Vol. 721, no 1, p. 145-154
Keywords [en]
Anadromous, Baltic Sea, Esox lucius, Northern pike, Pike factory, Restoration, Wetlands
National Category
Ecology
Research subject
Natural Science, Aquatic Ecology
Identifiers
URN: urn:nbn:se:lnu:diva-31269DOI: 10.1007/s10750-013-1656-9ISI: 000327129300014Scopus ID: 2-s2.0-84887998080OAI: oai:DiVA.org:lnu-31269DiVA, id: diva2:679595
Available from: 2013-12-16 Created: 2013-12-16 Last updated: 2017-12-06Bibliographically approved

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Nilsson, JonasEngstedt, OlofLarsson, Per

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  • apa
  • harvard1
  • ieee
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  • vancouver
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  • de-DE
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