Geographic and individual variation in haematozoan infections in the greenfinch, Carduelis chloris
Among- and within-population variation in prevalence and intensity of haematozoan infections was studied in blood samples taken from nine geographically widely separated greenfinch (Carduelis chloris) populations. Within populations, there were no consistent differences in prevalence between sexes o...
Published in: | Canadian Journal of Zoology |
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Canadian Science Publishing
1995
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crcansciencepubl:10.1139/z95-212 2024-09-15T18:06:05+00:00 Geographic and individual variation in haematozoan infections in the greenfinch, Carduelis chloris Merilä, Juha Björklund, Mats Bennett, Gordon F. 1995 http://dx.doi.org/10.1139/z95-212 http://www.nrcresearchpress.com/doi/pdf/10.1139/z95-212 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 73, issue 10, page 1798-1804 ISSN 0008-4301 1480-3283 journal-article 1995 crcansciencepubl https://doi.org/10.1139/z95-212 2024-08-15T04:09:33Z Among- and within-population variation in prevalence and intensity of haematozoan infections was studied in blood samples taken from nine geographically widely separated greenfinch (Carduelis chloris) populations. Within populations, there were no consistent differences in prevalence between sexes or between older age-classes, but prevalence was significantly lower among yearling birds (<5 months old) in one population. Individual heterozygosity, as revealed by analysis of five polymorphic protein coding loci, did not differ between infected and noninfected birds. However, significant differences in prevalence between Fennoscandian (high), central European (low), and Iberian (high) populations is consistent with the hypothesis that destruction of natural habitats has led to a significant decline of vector populations in central Europe. Given the high among-populations variation in prevalence, our results point to the need to consider the possibility of sampling bias in studies that seek to test, using avian blood parasites, Hamilton and Zuk's hypothesis that parasite resistance might be the target of female choice and drive the evolution of bright plumage and elaborate ornamentation. Article in Journal/Newspaper Fennoscandian Canadian Science Publishing Canadian Journal of Zoology 73 10 1798 1804 |
institution |
Open Polar |
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Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Among- and within-population variation in prevalence and intensity of haematozoan infections was studied in blood samples taken from nine geographically widely separated greenfinch (Carduelis chloris) populations. Within populations, there were no consistent differences in prevalence between sexes or between older age-classes, but prevalence was significantly lower among yearling birds (<5 months old) in one population. Individual heterozygosity, as revealed by analysis of five polymorphic protein coding loci, did not differ between infected and noninfected birds. However, significant differences in prevalence between Fennoscandian (high), central European (low), and Iberian (high) populations is consistent with the hypothesis that destruction of natural habitats has led to a significant decline of vector populations in central Europe. Given the high among-populations variation in prevalence, our results point to the need to consider the possibility of sampling bias in studies that seek to test, using avian blood parasites, Hamilton and Zuk's hypothesis that parasite resistance might be the target of female choice and drive the evolution of bright plumage and elaborate ornamentation. |
format |
Article in Journal/Newspaper |
author |
Merilä, Juha Björklund, Mats Bennett, Gordon F. |
spellingShingle |
Merilä, Juha Björklund, Mats Bennett, Gordon F. Geographic and individual variation in haematozoan infections in the greenfinch, Carduelis chloris |
author_facet |
Merilä, Juha Björklund, Mats Bennett, Gordon F. |
author_sort |
Merilä, Juha |
title |
Geographic and individual variation in haematozoan infections in the greenfinch, Carduelis chloris |
title_short |
Geographic and individual variation in haematozoan infections in the greenfinch, Carduelis chloris |
title_full |
Geographic and individual variation in haematozoan infections in the greenfinch, Carduelis chloris |
title_fullStr |
Geographic and individual variation in haematozoan infections in the greenfinch, Carduelis chloris |
title_full_unstemmed |
Geographic and individual variation in haematozoan infections in the greenfinch, Carduelis chloris |
title_sort |
geographic and individual variation in haematozoan infections in the greenfinch, carduelis chloris |
publisher |
Canadian Science Publishing |
publishDate |
1995 |
url |
http://dx.doi.org/10.1139/z95-212 http://www.nrcresearchpress.com/doi/pdf/10.1139/z95-212 |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_source |
Canadian Journal of Zoology volume 73, issue 10, page 1798-1804 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z95-212 |
container_title |
Canadian Journal of Zoology |
container_volume |
73 |
container_issue |
10 |
container_start_page |
1798 |
op_container_end_page |
1804 |
_version_ |
1810443591454031872 |