Rodent population cycle as a determinant of gastrointestinal nematode abundance in a low-arctic population of the red fox
We analyzed an 11-year time series (2005–2015) of parasite abundance for three intestinal nematode species in the red fox (Vulpes vulpes) as a function of the multi-annual rodent population cycle in low-arctic Norway, while correcting for other potential covariates that could influence prevalence an...
Published in: | International Journal for Parasitology: Parasites and Wildlife |
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ftdoajarticles:oai:doaj.org/article:070734cf68324bde801412117274feff 2023-05-15T14:51:35+02:00 Rodent population cycle as a determinant of gastrointestinal nematode abundance in a low-arctic population of the red fox Torill Mørk Rolf A. Ims Siw T. Killengreen 2019-08-01T00:00:00Z https://doi.org/10.1016/j.ijppaw.2019.03.002 https://doaj.org/article/070734cf68324bde801412117274feff EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S221322441830169X https://doaj.org/toc/2213-2244 2213-2244 doi:10.1016/j.ijppaw.2019.03.002 https://doaj.org/article/070734cf68324bde801412117274feff International Journal for Parasitology: Parasites and Wildlife, Vol 9, Iss , Pp 36-41 (2019) Zoology QL1-991 article 2019 ftdoajarticles https://doi.org/10.1016/j.ijppaw.2019.03.002 2022-12-31T09:47:26Z We analyzed an 11-year time series (2005–2015) of parasite abundance for three intestinal nematode species in the red fox (Vulpes vulpes) as a function of the multi-annual rodent population cycle in low-arctic Norway, while correcting for other potential covariates that could influence prevalence and abundance. Rodents are paratenic and facultative intermediate hosts for the two Ascarididae species Toxascaris leonina and Toxocara canis, respectively and key prey for the red fox. Still the relative importance of indirect transmission through rodents and direct transmission through free-living stages is unclear. Abundance of these Ascarididae species in individual red foxes (N = 612) exhibited strongly cyclic dynamics that closely mirrored the 4-year rodent cycle. Negative binomial models provided evidence for a direct proportional increase in Ascarididae abundance with rodent density suggesting that predator functional response to rodent prey is the key transmission mechanism. In contrast, no cycles and constantly very low abundance were apparent for Uncinaria stenocephala – a third nematode species recorded without paratenic or intermediate stages. Keywords: Arctic host-parasite system, Red fox, Intestinal nematodes, Rodent population cycles Article in Journal/Newspaper Arctic Arctic Population Directory of Open Access Journals: DOAJ Articles Arctic Norway International Journal for Parasitology: Parasites and Wildlife 9 36 41 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Zoology QL1-991 |
spellingShingle |
Zoology QL1-991 Torill Mørk Rolf A. Ims Siw T. Killengreen Rodent population cycle as a determinant of gastrointestinal nematode abundance in a low-arctic population of the red fox |
topic_facet |
Zoology QL1-991 |
description |
We analyzed an 11-year time series (2005–2015) of parasite abundance for three intestinal nematode species in the red fox (Vulpes vulpes) as a function of the multi-annual rodent population cycle in low-arctic Norway, while correcting for other potential covariates that could influence prevalence and abundance. Rodents are paratenic and facultative intermediate hosts for the two Ascarididae species Toxascaris leonina and Toxocara canis, respectively and key prey for the red fox. Still the relative importance of indirect transmission through rodents and direct transmission through free-living stages is unclear. Abundance of these Ascarididae species in individual red foxes (N = 612) exhibited strongly cyclic dynamics that closely mirrored the 4-year rodent cycle. Negative binomial models provided evidence for a direct proportional increase in Ascarididae abundance with rodent density suggesting that predator functional response to rodent prey is the key transmission mechanism. In contrast, no cycles and constantly very low abundance were apparent for Uncinaria stenocephala – a third nematode species recorded without paratenic or intermediate stages. Keywords: Arctic host-parasite system, Red fox, Intestinal nematodes, Rodent population cycles |
format |
Article in Journal/Newspaper |
author |
Torill Mørk Rolf A. Ims Siw T. Killengreen |
author_facet |
Torill Mørk Rolf A. Ims Siw T. Killengreen |
author_sort |
Torill Mørk |
title |
Rodent population cycle as a determinant of gastrointestinal nematode abundance in a low-arctic population of the red fox |
title_short |
Rodent population cycle as a determinant of gastrointestinal nematode abundance in a low-arctic population of the red fox |
title_full |
Rodent population cycle as a determinant of gastrointestinal nematode abundance in a low-arctic population of the red fox |
title_fullStr |
Rodent population cycle as a determinant of gastrointestinal nematode abundance in a low-arctic population of the red fox |
title_full_unstemmed |
Rodent population cycle as a determinant of gastrointestinal nematode abundance in a low-arctic population of the red fox |
title_sort |
rodent population cycle as a determinant of gastrointestinal nematode abundance in a low-arctic population of the red fox |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://doi.org/10.1016/j.ijppaw.2019.03.002 https://doaj.org/article/070734cf68324bde801412117274feff |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Arctic Population |
genre_facet |
Arctic Arctic Population |
op_source |
International Journal for Parasitology: Parasites and Wildlife, Vol 9, Iss , Pp 36-41 (2019) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S221322441830169X https://doaj.org/toc/2213-2244 2213-2244 doi:10.1016/j.ijppaw.2019.03.002 https://doaj.org/article/070734cf68324bde801412117274feff |
op_doi |
https://doi.org/10.1016/j.ijppaw.2019.03.002 |
container_title |
International Journal for Parasitology: Parasites and Wildlife |
container_volume |
9 |
container_start_page |
36 |
op_container_end_page |
41 |
_version_ |
1766322716040757248 |