Fish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density‐dependent transmission
Abstract Two common Dibothriocephalus (formerly Diphyllobothrium ) tapeworm species were significantly reduced by experimental culling of their fish host Arctic charr ( Salvelinus alpinus ) in a subarctic lake. Between 1984 and 1991, funnel traps were used to cull ~35 metric tons of Arctic charr, re...
Published in: | Journal of Applied Ecology |
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Online Access: | http://dx.doi.org/10.1111/1365-2664.13369 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2664.13369 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.13369 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2664.13369 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.13369 |
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crwiley:10.1111/1365-2664.13369 2024-06-02T08:00:04+00:00 Fish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density‐dependent transmission Henriksen, Eirik H. Frainer, André Knudsen, Rune Kristoffersen, Roar Kuris, Armand M. Lafferty, Kevin D. Amundsen, Per‐Arne Park, Andrew Universitetet i Tromsø Norges Forskningsråd 2019 http://dx.doi.org/10.1111/1365-2664.13369 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2664.13369 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.13369 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2664.13369 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.13369 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Applied Ecology volume 56, issue 6, page 1482-1491 ISSN 0021-8901 1365-2664 journal-article 2019 crwiley https://doi.org/10.1111/1365-2664.13369 2024-05-03T11:12:34Z Abstract Two common Dibothriocephalus (formerly Diphyllobothrium ) tapeworm species were significantly reduced by experimental culling of their fish host Arctic charr ( Salvelinus alpinus ) in a subarctic lake. 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 D. dendriticus (formerly dendriticum ) responding faster than D. ditremus (formerly ditremum ). 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. 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. Synthesis and applications . 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. Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus Subarctic Wiley Online Library Arctic Journal of Applied Ecology 56 6 1482 1491 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Two common Dibothriocephalus (formerly Diphyllobothrium ) tapeworm species were significantly reduced by experimental culling of their fish host Arctic charr ( Salvelinus alpinus ) in a subarctic lake. 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 D. dendriticus (formerly dendriticum ) responding faster than D. ditremus (formerly ditremum ). 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. 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. Synthesis and applications . 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. |
author2 |
Park, Andrew Universitetet i Tromsø Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Henriksen, Eirik H. Frainer, André Knudsen, Rune Kristoffersen, Roar Kuris, Armand M. Lafferty, Kevin D. Amundsen, Per‐Arne |
spellingShingle |
Henriksen, Eirik H. Frainer, André Knudsen, Rune Kristoffersen, Roar Kuris, Armand M. Lafferty, Kevin D. Amundsen, Per‐Arne Fish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density‐dependent transmission |
author_facet |
Henriksen, Eirik H. Frainer, André Knudsen, Rune Kristoffersen, Roar Kuris, Armand M. Lafferty, Kevin D. Amundsen, Per‐Arne |
author_sort |
Henriksen, Eirik H. |
title |
Fish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density‐dependent transmission |
title_short |
Fish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density‐dependent transmission |
title_full |
Fish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density‐dependent transmission |
title_fullStr |
Fish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density‐dependent transmission |
title_full_unstemmed |
Fish culling reduces tapeworm burden in Arctic charr by increasing parasite mortality rather than by reducing density‐dependent transmission |
title_sort |
fish culling reduces tapeworm burden in arctic charr by increasing parasite mortality rather than by reducing density‐dependent transmission |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1111/1365-2664.13369 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1365-2664.13369 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.13369 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2664.13369 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2664.13369 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus Subarctic |
genre_facet |
Arctic charr Arctic Salvelinus alpinus Subarctic |
op_source |
Journal of Applied Ecology volume 56, issue 6, page 1482-1491 ISSN 0021-8901 1365-2664 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/1365-2664.13369 |
container_title |
Journal of Applied Ecology |
container_volume |
56 |
container_issue |
6 |
container_start_page |
1482 |
op_container_end_page |
1491 |
_version_ |
1800744082808504320 |