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Survival costs of reproduction in the blue tit (Parus caeruleus): a role for blood parasites?

Stjernman, Martin LU ; Råberg, Lars LU and Nilsson, Jan-Åke LU (2004) In Royal Society of London. Proceedings B. Biological Sciences 271(1555). p.2387-2394
Abstract
One of the central tenets in life-history theory is that there is a trade-off between current and future reproduction (i.e. a cost of reproduction). The mechanism for this cost of reproduction is, however, largely unknown. One hypothesis is that the high workload during reproduction compromises resistance to parasites and that the resulting increase in parasitaemia has negative effects on the prospects of future survival. Although empirical evidence for a negative relationship between reproductive effort and parasite resistance exists, the causal relationships between reproductive effort, parasite resistance and future reproduction are still unclear. We use a path analytical approach to investigate whether a change in parasite resistance... (More)
One of the central tenets in life-history theory is that there is a trade-off between current and future reproduction (i.e. a cost of reproduction). The mechanism for this cost of reproduction is, however, largely unknown. One hypothesis is that the high workload during reproduction compromises resistance to parasites and that the resulting increase in parasitaemia has negative effects on the prospects of future survival. Although empirical evidence for a negative relationship between reproductive effort and parasite resistance exists, the causal relationships between reproductive effort, parasite resistance and future reproduction are still unclear. We use a path analytical approach to investigate whether a change in parasite resistance (as measured by intensities of infections by the blood parasite Haemoproteus) after manipulation of reproductive effort, translates into altered survival in female blue tits. Our results show a negative relationship between reproductive effort and parasite resistance, although evident only in first-year breeders. Moreover, we found survival costs of reproduction in first-year breeders. These costs were, however, not mediated by the blood parasite studied. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
in
Royal Society of London. Proceedings B. Biological Sciences
volume
271
issue
1555
pages
2387 - 2394
publisher
Royal Society
external identifiers
  • pmid:15556892
  • wos:000225645500011
  • scopus:16644377499
ISSN
1471-2954
DOI
10.1098/rspb.2004.2883
language
English
LU publication?
yes
id
1f4e5d93-e4c9-4db3-a62f-9f8e4e34e6a5 (old id 145418)
date added to LUP
2007-06-25 13:57:21
date last changed
2017-10-29 03:32:24
@article{1f4e5d93-e4c9-4db3-a62f-9f8e4e34e6a5,
  abstract     = {One of the central tenets in life-history theory is that there is a trade-off between current and future reproduction (i.e. a cost of reproduction). The mechanism for this cost of reproduction is, however, largely unknown. One hypothesis is that the high workload during reproduction compromises resistance to parasites and that the resulting increase in parasitaemia has negative effects on the prospects of future survival. Although empirical evidence for a negative relationship between reproductive effort and parasite resistance exists, the causal relationships between reproductive effort, parasite resistance and future reproduction are still unclear. We use a path analytical approach to investigate whether a change in parasite resistance (as measured by intensities of infections by the blood parasite Haemoproteus) after manipulation of reproductive effort, translates into altered survival in female blue tits. Our results show a negative relationship between reproductive effort and parasite resistance, although evident only in first-year breeders. Moreover, we found survival costs of reproduction in first-year breeders. These costs were, however, not mediated by the blood parasite studied.},
  author       = {Stjernman, Martin and Råberg, Lars and Nilsson, Jan-Åke},
  issn         = {1471-2954},
  language     = {eng},
  number       = {1555},
  pages        = {2387--2394},
  publisher    = {Royal Society},
  series       = {Royal Society of London. Proceedings B. Biological Sciences},
  title        = {Survival costs of reproduction in the blue tit (Parus caeruleus): a role for blood parasites?},
  url          = {http://dx.doi.org/10.1098/rspb.2004.2883},
  volume       = {271},
  year         = {2004},
}