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Personality and innate immune defenses in a wild bird: evidence for the pace-of-life hypothesis

Jacques-Hamilton, Rowan, Hall, Michelle L., Buttemer, William, Matson, Kevin D., da Silva, Anders Goncalves, Mulder, Raoul A. and Peters, Anne 2017, Personality and innate immune defenses in a wild bird: evidence for the pace-of-life hypothesis, Hormones and behavior, vol. 88, pp. 31-40, doi: 10.1016/j.yhbeh.2016.09.005.

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Title Personality and innate immune defenses in a wild bird: evidence for the pace-of-life hypothesis
Author(s) Jacques-Hamilton, Rowan
Hall, Michelle L.
Buttemer, William
Matson, Kevin D.
da Silva, Anders Goncalves
Mulder, Raoul A.
Peters, Anne
Journal name Hormones and behavior
Volume number 88
Start page 31
End page 40
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2017-02-12
ISSN 1095-6867
Keyword(s) Animal personality
coping style;
constitutive innate immunity;
proactive behavior;
stress responsiveness
ecological immunology
H:L ratio
natural antibodies Introduction
Constitutive innate immunity
Coping style
Natural antibodies
Proactive behavior
Summary We tested the two main evolutionary hypotheses for an association between immunity and personality. The risk-of-parasitism hypothesis predicts that more proactive (bold, exploratory, risk-taking) individuals have more vigorous immune defenses because of increased risk of parasite exposure. In contrast, the pace-of-life hypothesis argues that proactive behavioral styles are associated with shorter lifespans and reduced investment in immune function. Mechanistically, associations between immunity and personality can arise because personality differences are often associated with differences in condition and stress responsiveness, both of which are intricately linked with immunity. Here we investigate the association between personality (measured as proactive exploration of a novel environment) and three indices of innate immune function (the non-specific first line of defense against parasites) in wild superb fairy-wrens Malurus cyaneus. We also quantified body condition, hemoparasites (none detected), chronic stress (heterophil:lymphocyte ratio) and circulating corticosterone levels at the end of the behavioral test (CORT, in a subset of birds). We found that fast explorers had lower titers of natural antibodies. This result is consistent with the pace-of-life hypothesis, and with the previously documented higher mortality of fast explorers in this species. There was no interactive effect of exploration score and duration in captivity on immune indices. This suggests that personality-related differences in stress responsiveness did not underlie differences in immunity, even though behavioral style did modulate the effect of captivity on CORT. Taken together these results suggest reduced constitutive investment in innate immune function in more proactive individuals.
Language eng
DOI 10.1016/j.yhbeh.2016.09.005
Field of Research 060201 Behavioural Ecology
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier
Free to Read? No
Free to Read Start Date 2018-03-01
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Created: Mon, 10 Oct 2016, 11:49:59 EST

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