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dc.contributor.authorHenriksen, Eirik Haugstvedt
dc.contributor.authorFrainer, André
dc.contributor.authorKnudsen, Rune
dc.contributor.authorKristoffersen, Roar
dc.contributor.authorKuris, Armand M.
dc.contributor.authorLafferty, Kevin D.
dc.contributor.authorAmundsen, Per-Arne
dc.date.accessioned2019-12-04T14:42:25Z
dc.date.available2019-12-04T14:42:25Z
dc.date.issued2019-02-25
dc.description.abstract<ol> <li>Two common <i>Dibothriocephalus</i> (formerly <i>Diphyllobothrium</i>) tapeworm species were significantly reduced by experimental culling of their fish host Arctic charr (<i>Salvelinus alpinus</i>) in a subarctic lake.</li><p> <p><li>Between 1984 and 1991, funnel traps were used to cull ~35 metric tons of Arctic charr, reducing charr density by ~80%. As charr densities decreased, tapeworm prevalence and then intensity also declined over the following three decades, with <i>D. dendriticus</i> (formerly <i>dendriticum</i>) responding faster than <i>D. ditremus</i> (formerly <i>ditremum</i>). The two main hypotheses for how culling a host can decrease parasitism are reductions in parasite transmission due to reduced host density and reductions in parasite survival through increases in host mortality rates.</li><p> <p><li>We found little evidence that charr density was the main driver for reduced parasite transmission. Instead, decreased survivorship in charr, initially, through fishing‐induced changes in charr age structure, and later through increased predation rates by brown trout, led to increased parasite mortality. Although brown trout, which increased significantly after fish culling, are also hosts, they are often too big for the final host birds to eat, thus becoming parasite sinks.</li><p> <p><li><i>Synthesis and applications</i>. Fish populations with heavy parasite burdens constitute a management problem. Our results show how fish culling can indirectly reduce transmitted parasites through increased parasite mortality. Managing overcrowded fish populations by culling can produce two desirable outcomes: an increase in fish growth rates and reduced parasite burdens.</li> </ol>en_US
dc.descriptionThis is the peer reviewed version of the following article: Henriksen, E.H., Frainer, A., Knudsen, R., Kristoffersen, R., Kuris, A.M., Lafferty, K.D. & Amundsen, P-A. (2019). Fish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density-dependent transmission. <i>Journal of Applied Ecology, 56</i>(6), 1482-1491, which has been published in final form at <a href=https://doi.org/10.1111/1365-2664.13369>https://doi.org/10.1111/1365-2664.13369. </a>This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.en_US
dc.identifier.citationHenriksen EH, Frainer A, Knudsen R, Kristoffersen R, Kuris AM, Lafferty KD, Amundsen P-A. Fish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density-dependent transmission. Journal of Applied Ecology. 2019;56(6):1482-1491en_US
dc.identifier.cristinIDFRIDAID 1704957
dc.identifier.doi10.1111/1365-2664.13369
dc.identifier.issn0021-8901
dc.identifier.issn1365-2664
dc.identifier.urihttps://hdl.handle.net/10037/16795
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.ispartofHenriksen, E.H. (2021). Long-term dynamics of metazoan parasites in an age- and size-structured host population. (Doctoral thesis). <a href=https://hdl.handle.net/10037/22728>https://hdl.handle.net/10037/22728</a>.
dc.relation.journalJournal of Applied Ecology
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/FRIMEDBIO/213610/Norway/The role of parasites in food-web topology and dynamics of subarctic lakes//en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920en_US
dc.subjectVDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920en_US
dc.titleFish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density-dependent transmissionen_US
dc.type.versionacceptedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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