Reduced immune responsiveness contributes to winter energy conservation in an Arctic bird
Animals in seasonal environments must prudently manage energy expenditure to survive the winter. This may be achieved through reductions in the allocation of energy for various purposes (e.g. thermoregulation, locomotion, etc.). We studied whether such trade-offs also include suppression of the inna...
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The Company of Biologists
2020
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Online Access: | https://hdl.handle.net/10037/20185 https://doi.org/10.1242/jeb.219287 |
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ftunivtroemsoe:oai:munin.uit.no:10037/20185 2023-05-15T14:26:08+02:00 Reduced immune responsiveness contributes to winter energy conservation in an Arctic bird Nord, Andreas Arne, Hegemann Folkow, Lars 2020-04-27 https://hdl.handle.net/10037/20185 https://doi.org/10.1242/jeb.219287 eng eng The Company of Biologists Data are available from the figshare digital repository: https://doi.org/10.6084/m9.figshare.11968503.v1 . Journal of Experimental Biology Nord A, Arne, Folkow P. Reduced immune responsiveness contributes to winter energy conservation in an Arctic bird. Journal of Experimental Biology. 2020;223 FRIDAID 1864013 doi:10.1242/jeb.219287 0022-0949 1477-9145 https://hdl.handle.net/10037/20185 openAccess Copyright 2020 The Author(s) VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2020 ftunivtroemsoe https://doi.org/10.1242/jeb.219287 https://doi.org/10.6084/m9.figshare.11968503.v1 2021-06-25T17:57:53Z Animals in seasonal environments must prudently manage energy expenditure to survive the winter. This may be achieved through reductions in the allocation of energy for various purposes (e.g. thermoregulation, locomotion, etc.). We studied whether such trade-offs also include suppression of the innate immune response, by subjecting captive male Svalbard ptarmigan ( Lagopus muta hyperborea ) to bacterial lipopolysaccharide (LPS) during exposure to either mild temperature (0°C) or cold snaps (acute exposure to −20°C), in constant winter darkness when birds were in energy-conserving mode, and in constant daylight in spring. The innate immune response was mostly unaffected by temperature. However, energy expenditure was below baseline when birds were immune challenged in winter, but significantly above baseline in spring. This suggests that the energetic component of the innate immune response was reduced in winter, possibly contributing to energy conservation. Immunological parameters decreased (agglutination, lysis, bacteriostatic capacity) or did not change (haptoglobin/PIT54) after the challenge, and behavioural modifications (anorexia, mass loss) were lengthy (9 days). While we did not study the mechanisms explaining these weak, or slow, responses, it is tempting to speculate they may reflect the consequences of having evolved in an environment where pathogen transmission rate is presumably low for most of the year. This is an important consideration if climate change and increased exploitation of the Arctic would alter pathogen communities at a pace outwith counter-adaption in wildlife. Article in Journal/Newspaper Arctic Arctic Climate change Lagopus muta Lagopus muta hyperborea Svalbard University of Tromsø: Munin Open Research Archive Arctic Svalbard Journal of Experimental Biology 223 8 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 Nord, Andreas Arne, Hegemann Folkow, Lars Reduced immune responsiveness contributes to winter energy conservation in an Arctic bird |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 |
description |
Animals in seasonal environments must prudently manage energy expenditure to survive the winter. This may be achieved through reductions in the allocation of energy for various purposes (e.g. thermoregulation, locomotion, etc.). We studied whether such trade-offs also include suppression of the innate immune response, by subjecting captive male Svalbard ptarmigan ( Lagopus muta hyperborea ) to bacterial lipopolysaccharide (LPS) during exposure to either mild temperature (0°C) or cold snaps (acute exposure to −20°C), in constant winter darkness when birds were in energy-conserving mode, and in constant daylight in spring. The innate immune response was mostly unaffected by temperature. However, energy expenditure was below baseline when birds were immune challenged in winter, but significantly above baseline in spring. This suggests that the energetic component of the innate immune response was reduced in winter, possibly contributing to energy conservation. Immunological parameters decreased (agglutination, lysis, bacteriostatic capacity) or did not change (haptoglobin/PIT54) after the challenge, and behavioural modifications (anorexia, mass loss) were lengthy (9 days). While we did not study the mechanisms explaining these weak, or slow, responses, it is tempting to speculate they may reflect the consequences of having evolved in an environment where pathogen transmission rate is presumably low for most of the year. This is an important consideration if climate change and increased exploitation of the Arctic would alter pathogen communities at a pace outwith counter-adaption in wildlife. |
format |
Article in Journal/Newspaper |
author |
Nord, Andreas Arne, Hegemann Folkow, Lars |
author_facet |
Nord, Andreas Arne, Hegemann Folkow, Lars |
author_sort |
Nord, Andreas |
title |
Reduced immune responsiveness contributes to winter energy conservation in an Arctic bird |
title_short |
Reduced immune responsiveness contributes to winter energy conservation in an Arctic bird |
title_full |
Reduced immune responsiveness contributes to winter energy conservation in an Arctic bird |
title_fullStr |
Reduced immune responsiveness contributes to winter energy conservation in an Arctic bird |
title_full_unstemmed |
Reduced immune responsiveness contributes to winter energy conservation in an Arctic bird |
title_sort |
reduced immune responsiveness contributes to winter energy conservation in an arctic bird |
publisher |
The Company of Biologists |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/20185 https://doi.org/10.1242/jeb.219287 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Arctic Climate change Lagopus muta Lagopus muta hyperborea Svalbard |
genre_facet |
Arctic Arctic Climate change Lagopus muta Lagopus muta hyperborea Svalbard |
op_relation |
Data are available from the figshare digital repository: https://doi.org/10.6084/m9.figshare.11968503.v1 . Journal of Experimental Biology Nord A, Arne, Folkow P. Reduced immune responsiveness contributes to winter energy conservation in an Arctic bird. Journal of Experimental Biology. 2020;223 FRIDAID 1864013 doi:10.1242/jeb.219287 0022-0949 1477-9145 https://hdl.handle.net/10037/20185 |
op_rights |
openAccess Copyright 2020 The Author(s) |
op_doi |
https://doi.org/10.1242/jeb.219287 https://doi.org/10.6084/m9.figshare.11968503.v1 |
container_title |
Journal of Experimental Biology |
container_volume |
223 |
container_issue |
8 |
_version_ |
1766298616243159040 |