Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Causes and consequences of life-history variation: The effects of parasites, glucocorticoids, and environmental conditions in the collared flycatcher (Ficedula albicollis)
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Animal ecology.
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Life-history is the study of all the different stages of life that affect reproductive success and survival between the birth and death of an organism. The reproductive output of an organism is constrained by many things including time, resource, disease agents and environmental conditions. In addition, lineage-specific traits and the limitations of the physiological systems can limit how an organism responds to ecological processes, and thus constrains the variation of life histories represented in nature. Central to the theory of life history are the trade-offs that organisms make during their lifetime to maximise their reproductive potential. In this thesis, I focus on the effect of haemosporidian blood parasites on host life history, in relation to the glucocorticoid response and environmental conditions. The host study species is a population of collared flycatchers (Ficedula albicollis), a species that provides bi-parental care, located in the south of Gotland. We show that nestling condition predicts parasite infection and that parasite-mediated selection can start early on in the birds’ life. We also found a link between Lower levels of glucocorticoids and parasite infection, which might indicate a trade-off between immunity and reproductive effort. Adult birds’ upregulated glucocorticoids in response to an increase in reproductive effort and a predictable change in energy demand during reproduction. I also show that glucocorticoids respond to changing environmental conditions. These results together accentuate the importance of the plasticity of the glucocorticoid response to reproductive success. Moreover, higher levels of hormone during reproduction predicted survival to the next breeding season. In nestlings, glucocorticoid levels increased as a consequence of parent infection status and an increase in reproductive effort. Overall, our results indicate that the glucocorticoid response is context dependent. Finally, female collared flycatchers might pay a fitness cost as a consequence of parasite infection, but can still reproduce successfully suggesting that they can tolerate the parasite. To further our understanding of costs related to parasite infection, we must understand better the mechanisms that enable the host to tolerate infection. This study indicates that glucocorticoids provide a useful tool to detect how wild birds respond to predictable and unpredictable challenges.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2017. , 38 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1569
Keyword [en]
Collard flycatcher, Haemosporidian blood parasite, glucocorticoid, life history
National Category
Evolutionary Biology
Identifiers
URN: urn:nbn:se:uu:diva-330848ISBN: 978-91-513-0091-7 (print)OAI: oai:DiVA.org:uu-330848DiVA: diva2:1147143
Public defence
2017-11-24, Zootissalen, Norbyvägen 18D, Uppsala, 10:00 (English)
Opponent
Supervisors
Available from: 2017-10-30 Created: 2017-10-05 Last updated: 2017-11-01
List of papers
1. The pattern of haemosporidian blood parasite infection in collared flycatchers during their lifetime
Open this publication in new window or tab >>The pattern of haemosporidian blood parasite infection in collared flycatchers during their lifetime
(English)Manuscript (preprint) (Other academic)
Keyword
Haemosporidian blood parasite, collared flycatcher nestlings, recruitment, body condition index, survival
National Category
Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-330842 (URN)
Available from: 2017-10-04 Created: 2017-10-04 Last updated: 2017-10-12
2. Experimental brood size manipulation and parental infection status affect development stress as revealed by nestling feather corticosterone
Open this publication in new window or tab >>Experimental brood size manipulation and parental infection status affect development stress as revealed by nestling feather corticosterone
(English)Manuscript (preprint) (Other academic)
Keyword
Corticosterone, development stress, reproductive effort, bi-parental care, intergenerational costs, recruitment, long-term effects, haemosporidian blood parasites
National Category
Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-330843 (URN)
Available from: 2017-10-04 Created: 2017-10-04 Last updated: 2017-10-05
3. Upregulation of baseline corticosterone in response to the life-history stage and a brood experiment detected in the droppings of a wild bird
Open this publication in new window or tab >>Upregulation of baseline corticosterone in response to the life-history stage and a brood experiment detected in the droppings of a wild bird
(English)Manuscript (preprint) (Other academic)
Keyword
Life history, metabolized corticosterone, glucocorticoid, reproductive investment, weather conditions, collared flycatcher
National Category
Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-330844 (URN)
Available from: 2017-10-04 Created: 2017-10-04 Last updated: 2017-10-05
4. Glucocorticoid level during reproduction predicts survival but is suppressed in response to parasite infection in collared flycatchers
Open this publication in new window or tab >>Glucocorticoid level during reproduction predicts survival but is suppressed in response to parasite infection in collared flycatchers
(English)Manuscript (preprint) (Other academic)
Keyword
Metabolised corticosterone, Haemosporidian blood parasite, survival, trade-off
National Category
Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-330845 (URN)
Available from: 2017-10-04 Created: 2017-10-04 Last updated: 2017-10-05
5. Methods of glucocorticoid sampling in a natural population
Open this publication in new window or tab >>Methods of glucocorticoid sampling in a natural population
(English)Manuscript (preprint) (Other academic)
Keyword
Circulating corticosterone, metabolised corticosterone, feather corticosterone, condition index, collared flycatcher nestling
National Category
Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-330846 (URN)
Available from: 2017-10-04 Created: 2017-10-04 Last updated: 2017-10-05

Open Access in DiVA

fulltext(845 kB)111 downloads
File information
File name FULLTEXT01.pdfFile size 845 kBChecksum SHA-512
14b32a1ec588f63f97dea7cd269725fc4afe18b35deca7a6e8ba81073788a4eacbc1504c33999155aac607855e6215954c41c43e1c03418f2931ad9d264865b2
Type fulltextMimetype application/pdf

Authority records BETA

Fletcher, Kevin

Search in DiVA

By author/editor
Fletcher, Kevin
By organisation
Animal ecology
Evolutionary Biology

Search outside of DiVA

GoogleGoogle Scholar
Total: 111 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 330 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf