Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations
Seasonal variation in immune function can be attributed to life history trade-offs, and to variation in environmental conditions. However, because phenological stages and environmental conditions co-vary in temperate and arctic zones, their separate contributions have not been determined. We compare...
Published in: | Oecologia |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2021
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Online Access: | https://hdl.handle.net/11370/be339512-43ff-430f-bf34-64dcb381a1ef https://research.rug.nl/en/publications/be339512-43ff-430f-bf34-64dcb381a1ef https://doi.org/10.1007/s00442-021-05052-0 https://pure.rug.nl/ws/files/193918768/Ndithia2021_Article_ImmuneFunctionDiffersAmongTrop.pdf http://www.scopus.com/inward/record.url?scp=85116900872&partnerID=8YFLogxK |
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ftunigroningenpu:oai:pure.rug.nl:publications/be339512-43ff-430f-bf34-64dcb381a1ef 2024-06-23T07:50:45+00:00 Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations Ndithia, Henry K. Matson, Kevin D. Muchai, Muchane Tieleman, B. Irene 2021-11 application/pdf https://hdl.handle.net/11370/be339512-43ff-430f-bf34-64dcb381a1ef https://research.rug.nl/en/publications/be339512-43ff-430f-bf34-64dcb381a1ef https://doi.org/10.1007/s00442-021-05052-0 https://pure.rug.nl/ws/files/193918768/Ndithia2021_Article_ImmuneFunctionDiffersAmongTrop.pdf http://www.scopus.com/inward/record.url?scp=85116900872&partnerID=8YFLogxK eng eng https://research.rug.nl/en/publications/be339512-43ff-430f-bf34-64dcb381a1ef info:eu-repo/semantics/openAccess Ndithia , H K , Matson , K D , Muchai , M & Tieleman , B I 2021 , ' Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations ' , Oecologia , vol. 197 , no. 3 , pp. 599-614 . https://doi.org/10.1007/s00442-021-05052-0 Chick-feeding Environmental conditions Immune function Non-breeding Tropics article 2021 ftunigroningenpu https://doi.org/10.1007/s00442-021-05052-0 2024-06-10T17:10:44Z Seasonal variation in immune function can be attributed to life history trade-offs, and to variation in environmental conditions. However, because phenological stages and environmental conditions co-vary in temperate and arctic zones, their separate contributions have not been determined. We compared immune function and body mass of incubating (female only), chick-feeding (female and male), and non-breeding (female and male) red-capped larks Calandrella cinerea breeding year-round in three tropical equatorial (Kenya) environments with distinct climates. We measured four immune indices: haptoglobin, nitric oxide, agglutination, and lysis. To confirm that variation in immune function between breeding (i.e., incubating or chick-feeding) and non-breeding was not confounded by environmental conditions, we tested if rainfall, average minimum temperature (T min ), and average maximum temperature (T max ) differed during sampling times among the three breeding statuses per location. T min and T max differed between chick-feeding and non-breeding, suggesting that birds utilized environmental conditions differently in different locations for reproduction. Immune indices did not differ between incubating, chick-feeding and non-breeding birds in all three locations. There were two exceptions: nitric oxide was higher during incubation in cool and wet South Kinangop, and it was higher during chick-feeding in the cool and dry North Kinangop compared to non-breeding birds in these locations. For nitric oxide, agglutination, and lysis, we found among-location differences within breeding stage. In equatorial tropical birds, variation in immune function seems to be better explained by among-location climate-induced environmental conditions than by breeding status. Our findings raise questions about how within-location environmental variation relates to and affects immune function. Article in Journal/Newspaper Arctic University of Groningen research database Arctic Oecologia 197 3 599 614 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
Chick-feeding Environmental conditions Immune function Non-breeding Tropics |
spellingShingle |
Chick-feeding Environmental conditions Immune function Non-breeding Tropics Ndithia, Henry K. Matson, Kevin D. Muchai, Muchane Tieleman, B. Irene Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
topic_facet |
Chick-feeding Environmental conditions Immune function Non-breeding Tropics |
description |
Seasonal variation in immune function can be attributed to life history trade-offs, and to variation in environmental conditions. However, because phenological stages and environmental conditions co-vary in temperate and arctic zones, their separate contributions have not been determined. We compared immune function and body mass of incubating (female only), chick-feeding (female and male), and non-breeding (female and male) red-capped larks Calandrella cinerea breeding year-round in three tropical equatorial (Kenya) environments with distinct climates. We measured four immune indices: haptoglobin, nitric oxide, agglutination, and lysis. To confirm that variation in immune function between breeding (i.e., incubating or chick-feeding) and non-breeding was not confounded by environmental conditions, we tested if rainfall, average minimum temperature (T min ), and average maximum temperature (T max ) differed during sampling times among the three breeding statuses per location. T min and T max differed between chick-feeding and non-breeding, suggesting that birds utilized environmental conditions differently in different locations for reproduction. Immune indices did not differ between incubating, chick-feeding and non-breeding birds in all three locations. There were two exceptions: nitric oxide was higher during incubation in cool and wet South Kinangop, and it was higher during chick-feeding in the cool and dry North Kinangop compared to non-breeding birds in these locations. For nitric oxide, agglutination, and lysis, we found among-location differences within breeding stage. In equatorial tropical birds, variation in immune function seems to be better explained by among-location climate-induced environmental conditions than by breeding status. Our findings raise questions about how within-location environmental variation relates to and affects immune function. |
format |
Article in Journal/Newspaper |
author |
Ndithia, Henry K. Matson, Kevin D. Muchai, Muchane Tieleman, B. Irene |
author_facet |
Ndithia, Henry K. Matson, Kevin D. Muchai, Muchane Tieleman, B. Irene |
author_sort |
Ndithia, Henry K. |
title |
Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
title_short |
Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
title_full |
Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
title_fullStr |
Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
title_full_unstemmed |
Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
title_sort |
immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
publishDate |
2021 |
url |
https://hdl.handle.net/11370/be339512-43ff-430f-bf34-64dcb381a1ef https://research.rug.nl/en/publications/be339512-43ff-430f-bf34-64dcb381a1ef https://doi.org/10.1007/s00442-021-05052-0 https://pure.rug.nl/ws/files/193918768/Ndithia2021_Article_ImmuneFunctionDiffersAmongTrop.pdf http://www.scopus.com/inward/record.url?scp=85116900872&partnerID=8YFLogxK |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Ndithia , H K , Matson , K D , Muchai , M & Tieleman , B I 2021 , ' Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations ' , Oecologia , vol. 197 , no. 3 , pp. 599-614 . https://doi.org/10.1007/s00442-021-05052-0 |
op_relation |
https://research.rug.nl/en/publications/be339512-43ff-430f-bf34-64dcb381a1ef |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s00442-021-05052-0 |
container_title |
Oecologia |
container_volume |
197 |
container_issue |
3 |
container_start_page |
599 |
op_container_end_page |
614 |
_version_ |
1802641656417091584 |