Host-Parasite Interactions and Population Dynamics of Rock Ptarmigan.
Populations of rock ptarmigan (Lagopus muta) in Iceland fluctuate in multiannual cycles with peak numbers c. every 10 years. We studied the ptarmigan-parasite community and how parasites relate to ptarmigan age, body condition, and population density. We collected 632 ptarmigan in northeast Iceland...
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ftdoajarticles:oai:doaj.org/article:2beba723a90d4adfa7c07f80b6386385 2023-05-15T16:48:44+02:00 Host-Parasite Interactions and Population Dynamics of Rock Ptarmigan. Ute Stenkewitz Ólafur K Nielsen Karl Skírnisson Gunnar Stefánsson 2016-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0165293 https://doaj.org/article/2beba723a90d4adfa7c07f80b6386385 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC5117593?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0165293 https://doaj.org/article/2beba723a90d4adfa7c07f80b6386385 PLoS ONE, Vol 11, Iss 11, p e0165293 (2016) Medicine R Science Q article 2016 ftdoajarticles https://doi.org/10.1371/journal.pone.0165293 2022-12-31T14:51:44Z Populations of rock ptarmigan (Lagopus muta) in Iceland fluctuate in multiannual cycles with peak numbers c. every 10 years. We studied the ptarmigan-parasite community and how parasites relate to ptarmigan age, body condition, and population density. We collected 632 ptarmigan in northeast Iceland in early October from 2006 to 2012; 630 (99.7%) were infected with at least one parasite species, 616 (98%) with ectoparasites, and 536 (85%) with endoparasites. We analysed indices for the combined parasite community (16 species) and known pathogenic parasites, two coccidian protozoans Eimeria muta and Eimeria rjupa, two nematodes Capillaria caudinflata and Trichostrongylus tenuis, one chewing louse Amyrsidea lagopi, and one skin mite Metamicrolichus islandicus. Juveniles overall had more ectoparasites than adults, but endoparasite levels were similar in both groups. Ptarmigan population density was associated with endoparasites, and in particular prevalence of the coccidian parasite Eimeria muta. Annual aggregation level of this eimerid fluctuated inversely with prevalence, with lows at prevalence peak and vice versa. Both prevalence and aggregation of E. muta tracked ptarmigan population density with a 1.5 year time lag. The time lag could be explained by the host specificity of this eimerid, host density dependent shedding of oocysts, and their persistence in the environment from one year to the next. Ptarmigan body condition was negatively associated with E. muta prevalence, an indication of their pathogenicity, and this eimerid was also positively associated with ptarmigan mortality and marginally inversely with fecundity. There were also significant associations between fecundity and chewing louse Amyrsidea lagopi prevalence (negative), excess juvenile mortality and nematode Capillaria caudinflata prevalence (positive), and adult mortality and skin mite Metamicrolichus islandicus prevalence (negative). Though this study is correlational, it provides strong evidence that E. muta through time-lag in prevalence ... Article in Journal/Newspaper Iceland Lagopus muta rock ptarmigan Mite Directory of Open Access Journals: DOAJ Articles PLOS ONE 11 11 e0165293 |
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Medicine R Science Q Ute Stenkewitz Ólafur K Nielsen Karl Skírnisson Gunnar Stefánsson Host-Parasite Interactions and Population Dynamics of Rock Ptarmigan. |
topic_facet |
Medicine R Science Q |
description |
Populations of rock ptarmigan (Lagopus muta) in Iceland fluctuate in multiannual cycles with peak numbers c. every 10 years. We studied the ptarmigan-parasite community and how parasites relate to ptarmigan age, body condition, and population density. We collected 632 ptarmigan in northeast Iceland in early October from 2006 to 2012; 630 (99.7%) were infected with at least one parasite species, 616 (98%) with ectoparasites, and 536 (85%) with endoparasites. We analysed indices for the combined parasite community (16 species) and known pathogenic parasites, two coccidian protozoans Eimeria muta and Eimeria rjupa, two nematodes Capillaria caudinflata and Trichostrongylus tenuis, one chewing louse Amyrsidea lagopi, and one skin mite Metamicrolichus islandicus. Juveniles overall had more ectoparasites than adults, but endoparasite levels were similar in both groups. Ptarmigan population density was associated with endoparasites, and in particular prevalence of the coccidian parasite Eimeria muta. Annual aggregation level of this eimerid fluctuated inversely with prevalence, with lows at prevalence peak and vice versa. Both prevalence and aggregation of E. muta tracked ptarmigan population density with a 1.5 year time lag. The time lag could be explained by the host specificity of this eimerid, host density dependent shedding of oocysts, and their persistence in the environment from one year to the next. Ptarmigan body condition was negatively associated with E. muta prevalence, an indication of their pathogenicity, and this eimerid was also positively associated with ptarmigan mortality and marginally inversely with fecundity. There were also significant associations between fecundity and chewing louse Amyrsidea lagopi prevalence (negative), excess juvenile mortality and nematode Capillaria caudinflata prevalence (positive), and adult mortality and skin mite Metamicrolichus islandicus prevalence (negative). Though this study is correlational, it provides strong evidence that E. muta through time-lag in prevalence ... |
format |
Article in Journal/Newspaper |
author |
Ute Stenkewitz Ólafur K Nielsen Karl Skírnisson Gunnar Stefánsson |
author_facet |
Ute Stenkewitz Ólafur K Nielsen Karl Skírnisson Gunnar Stefánsson |
author_sort |
Ute Stenkewitz |
title |
Host-Parasite Interactions and Population Dynamics of Rock Ptarmigan. |
title_short |
Host-Parasite Interactions and Population Dynamics of Rock Ptarmigan. |
title_full |
Host-Parasite Interactions and Population Dynamics of Rock Ptarmigan. |
title_fullStr |
Host-Parasite Interactions and Population Dynamics of Rock Ptarmigan. |
title_full_unstemmed |
Host-Parasite Interactions and Population Dynamics of Rock Ptarmigan. |
title_sort |
host-parasite interactions and population dynamics of rock ptarmigan. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2016 |
url |
https://doi.org/10.1371/journal.pone.0165293 https://doaj.org/article/2beba723a90d4adfa7c07f80b6386385 |
genre |
Iceland Lagopus muta rock ptarmigan Mite |
genre_facet |
Iceland Lagopus muta rock ptarmigan Mite |
op_source |
PLoS ONE, Vol 11, Iss 11, p e0165293 (2016) |
op_relation |
http://europepmc.org/articles/PMC5117593?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0165293 https://doaj.org/article/2beba723a90d4adfa7c07f80b6386385 |
op_doi |
https://doi.org/10.1371/journal.pone.0165293 |
container_title |
PLOS ONE |
container_volume |
11 |
container_issue |
11 |
container_start_page |
e0165293 |
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