Fitness and fur colouration: Testing the camouflage and thermoregulation hypotheses in an Arctic mammal
Abstract Selection for crypsis has been recognized as an important ecological driver of animal colouration, whereas the relative importance of thermoregulation is more contentious with mixed empirical support. A potential thermal advantage of darker individuals has been observed in a wide range of a...
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Online Access: | http://dx.doi.org/10.1111/1365-2656.13457 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13457 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2656.13457 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13457 |
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crwiley:10.1111/1365-2656.13457 2024-06-02T08:00:11+00:00 Fitness and fur colouration: Testing the camouflage and thermoregulation hypotheses in an Arctic mammal Di Bernardi, Cecilia Thierry, Anne‐Mathilde Eide, Nina E. Bowler, Diana E. Rød‐Eriksen, Lars Blumentrath, Stefan Tietgen, Lukas Sandercock, Brett K. Flagstad, Øystein Landa, Arild Norges Forskningsråd Miljødirektoratet 2021 http://dx.doi.org/10.1111/1365-2656.13457 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13457 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2656.13457 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13457 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Journal of Animal Ecology volume 90, issue 5, page 1328-1340 ISSN 0021-8790 1365-2656 journal-article 2021 crwiley https://doi.org/10.1111/1365-2656.13457 2024-05-03T10:55:31Z Abstract Selection for crypsis has been recognized as an important ecological driver of animal colouration, whereas the relative importance of thermoregulation is more contentious with mixed empirical support. A potential thermal advantage of darker individuals has been observed in a wide range of animal species. Arctic animals that exhibit colour polymorphisms and undergo seasonal colour moults are interesting study subjects for testing the two alternative hypotheses: demographic performance of different colour morphs might be differentially affected by snow cover with a cryptic advantage for lighter morphs, or conversely by winter temperature with a thermal advantage for darker morphs. In this study, we explored whether camouflage and thermoregulation might explain differences in reproduction and survival between the white and blue colour morphs of the Arctic fox Vulpes lagopus under natural conditions. Juvenile and adult survival, breeding propensity and litter size were measured for 798 captive‐bred and released or wild‐born Arctic foxes monitored during an 11‐year period (2007–2017) in two subpopulations in south‐central Norway. We investigated the proportion of the two colour morphs and compared their demographic performance in relation to spatial variation in duration of snow cover, onset of snow season and winter temperatures. After population re‐establishment, a higher proportion of blue individuals was observed among wild‐born Arctic foxes compared to the proportion of blue foxes released from the captive population. Our field study provides the first evidence for an effect of colour morph on the reproductive performance of Arctic foxes under natural conditions, with a higher breeding propensity of the blue morph compared to the white one. Performance of the two colour morphs was not differentially affected by the climatic variables, except for juvenile survival. Blue morph juveniles showed a tendency for higher survival under colder winter temperatures but lower survival under warmer temperatures ... Article in Journal/Newspaper Arctic Fox Arctic Vulpes lagopus Wiley Online Library Arctic Norway Journal of Animal Ecology 90 5 1328 1340 |
institution |
Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Selection for crypsis has been recognized as an important ecological driver of animal colouration, whereas the relative importance of thermoregulation is more contentious with mixed empirical support. A potential thermal advantage of darker individuals has been observed in a wide range of animal species. Arctic animals that exhibit colour polymorphisms and undergo seasonal colour moults are interesting study subjects for testing the two alternative hypotheses: demographic performance of different colour morphs might be differentially affected by snow cover with a cryptic advantage for lighter morphs, or conversely by winter temperature with a thermal advantage for darker morphs. In this study, we explored whether camouflage and thermoregulation might explain differences in reproduction and survival between the white and blue colour morphs of the Arctic fox Vulpes lagopus under natural conditions. Juvenile and adult survival, breeding propensity and litter size were measured for 798 captive‐bred and released or wild‐born Arctic foxes monitored during an 11‐year period (2007–2017) in two subpopulations in south‐central Norway. We investigated the proportion of the two colour morphs and compared their demographic performance in relation to spatial variation in duration of snow cover, onset of snow season and winter temperatures. After population re‐establishment, a higher proportion of blue individuals was observed among wild‐born Arctic foxes compared to the proportion of blue foxes released from the captive population. Our field study provides the first evidence for an effect of colour morph on the reproductive performance of Arctic foxes under natural conditions, with a higher breeding propensity of the blue morph compared to the white one. Performance of the two colour morphs was not differentially affected by the climatic variables, except for juvenile survival. Blue morph juveniles showed a tendency for higher survival under colder winter temperatures but lower survival under warmer temperatures ... |
author2 |
Norges Forskningsråd Miljødirektoratet |
format |
Article in Journal/Newspaper |
author |
Di Bernardi, Cecilia Thierry, Anne‐Mathilde Eide, Nina E. Bowler, Diana E. Rød‐Eriksen, Lars Blumentrath, Stefan Tietgen, Lukas Sandercock, Brett K. Flagstad, Øystein Landa, Arild |
spellingShingle |
Di Bernardi, Cecilia Thierry, Anne‐Mathilde Eide, Nina E. Bowler, Diana E. Rød‐Eriksen, Lars Blumentrath, Stefan Tietgen, Lukas Sandercock, Brett K. Flagstad, Øystein Landa, Arild Fitness and fur colouration: Testing the camouflage and thermoregulation hypotheses in an Arctic mammal |
author_facet |
Di Bernardi, Cecilia Thierry, Anne‐Mathilde Eide, Nina E. Bowler, Diana E. Rød‐Eriksen, Lars Blumentrath, Stefan Tietgen, Lukas Sandercock, Brett K. Flagstad, Øystein Landa, Arild |
author_sort |
Di Bernardi, Cecilia |
title |
Fitness and fur colouration: Testing the camouflage and thermoregulation hypotheses in an Arctic mammal |
title_short |
Fitness and fur colouration: Testing the camouflage and thermoregulation hypotheses in an Arctic mammal |
title_full |
Fitness and fur colouration: Testing the camouflage and thermoregulation hypotheses in an Arctic mammal |
title_fullStr |
Fitness and fur colouration: Testing the camouflage and thermoregulation hypotheses in an Arctic mammal |
title_full_unstemmed |
Fitness and fur colouration: Testing the camouflage and thermoregulation hypotheses in an Arctic mammal |
title_sort |
fitness and fur colouration: testing the camouflage and thermoregulation hypotheses in an arctic mammal |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/1365-2656.13457 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13457 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2656.13457 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13457 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Fox Arctic Vulpes lagopus |
genre_facet |
Arctic Fox Arctic Vulpes lagopus |
op_source |
Journal of Animal Ecology volume 90, issue 5, page 1328-1340 ISSN 0021-8790 1365-2656 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1111/1365-2656.13457 |
container_title |
Journal of Animal Ecology |
container_volume |
90 |
container_issue |
5 |
container_start_page |
1328 |
op_container_end_page |
1340 |
_version_ |
1800744179182075904 |