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Immune activity elevates energy expenditure of house sparrows : a link between direct and indirect costs?

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2003

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Martin, Lynn B.
Scheuerlein, Alex

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Proceedings of the Royal Society of London / Series B : Biological Sciences. 2003, 270(1511), pp. 153-158. ISSN 0962-8452. eISSN 1471-2954. Available under: doi: 10.1098/rspb.2002.2185

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The activation of an immune response is beneficial for organisms but may also have costs that affect fitness. Documented immune costs include those associated with acquisition of special nutrients, as well as immunopathology or autoimmunity. Here, we test whether an experimental induction of the immune system with a non-pathological stimulant can elevate energy turnover in passerine birds. We injected phytohaemagglutinin (PHA), a commonly used mitogen that activates the cell-mediated immune response, into the wing web of house sparrows, Passer domesticus. We then examined energetic costs resulting from this immune activity and related those costs to other physiological activities. We found that PHA injection significantly elevated resting metabolic rate (RMR) of challenged sparrows relative to saline controls. We calculated the total cost of this immune activity to be ca. 4.20 kJ per day (29% RMR), which is equivalent to the cost of production of half of an egg (8.23 kJ egg-1) in this species. We suggest that immune activity in wild passerines increases energy expenditure, which in turn may influence important life-history characteristics such as clutch size, timing of breeding or the scheduling of moult.

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570 Biowissenschaften, Biologie

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ISO 690MARTIN, Lynn B., Alex SCHEUERLEIN, Martin WIKELSKI, 2003. Immune activity elevates energy expenditure of house sparrows : a link between direct and indirect costs?. In: Proceedings of the Royal Society of London / Series B : Biological Sciences. 2003, 270(1511), pp. 153-158. ISSN 0962-8452. eISSN 1471-2954. Available under: doi: 10.1098/rspb.2002.2185
BibTex
@article{Martin2003-01-22Immun-42523,
  year={2003},
  doi={10.1098/rspb.2002.2185},
  title={Immune activity elevates energy expenditure of house sparrows : a link between direct and indirect costs?},
  number={1511},
  volume={270},
  issn={0962-8452},
  journal={Proceedings of the Royal Society of London / Series B : Biological Sciences},
  pages={153--158},
  author={Martin, Lynn B. and Scheuerlein, Alex and Wikelski, Martin}
}
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