Juvenile infection and male display

Testing the bright male hypothesis across individual life histories

Gerald Borgia, Marc Egeth, J. Albert Uy, Gail L. Patricelli

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Current tests of the bright male hypothesis focus on assays of adult disease resistance and their relation to male trait development and female choice. We suggest that if parasites have significant harmful effects on juvenile stages of a host, then females selecting males that effectively signal juvenile parasite resistance may gain a significant "good genes" benefit. Currently, there is no information on juvenile and adult infection or resistance in the same male and whether adult male displays signal juvenile parasite resistance. In the present study, we measure infection of the ectoparasitic louse, Myrsidea ptilonorhynchi, in individual male satin bowerbirds (Ptilonorhynchus violaceus) both as juveniles and nine or more years later as adults. We test hypotheses that examine the role of juvenile parasite infection in mediating sexual selection. We found that (1) juvenile infection is higher than adult infection in the same individuals, (2) adult males able to hold display sites have lower juvenile infection, and (3) juvenile and adult infection in the same individuals are not significantly correlated. In addition, comparisons among a larger set of individuals from a single year show that blood and ectoparasite infections are highly correlated, and both decrease with male age and are inversely related to male courtship success. These results, combined with the evidence that females mate exclusively with bower-holding males support the hypothesis that females use adult male display traits to identify males with a high level of juvenile disease resistance. We suggest that effective tests of the bright male hypothesis should include (1) assessment of infection resistance in both subadult and adult life history stages, (2) tests of whether differences in age-specific resistance are indicated in adult male displays, and (3) tests to determine if females attend to these traits in mate choice. Although these requirements increase the difficulty of testing the bright male hypothesis, they are necessary for a more accurate assessment of the effects of parasites on male display and female choice.

Original languageEnglish
Pages (from-to)722-728
Number of pages7
JournalBehavioral Ecology
Volume15
Issue number5
DOIs
StatePublished - Sep 1 2004
Externally publishedYes

Fingerprint

life history
Infection
infection
testing
Parasites
parasites
parasite resistance
parasite
Disease Resistance
disease resistance
Phthiraptera
Courtship
Parasitic Diseases
louse
ectoparasite
lice
mate choice
courtship
ectoparasites
sexual selection

Keywords

  • Bright male hypothesis
  • Mate choice
  • Parasites
  • Sexual selection

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Ecology
  • Behavioral Neuroscience

Cite this

Juvenile infection and male display : Testing the bright male hypothesis across individual life histories. / Borgia, Gerald; Egeth, Marc; Uy, J. Albert; Patricelli, Gail L.

In: Behavioral Ecology, Vol. 15, No. 5, 01.09.2004, p. 722-728.

Research output: Contribution to journalArticle

Borgia, Gerald ; Egeth, Marc ; Uy, J. Albert ; Patricelli, Gail L. / Juvenile infection and male display : Testing the bright male hypothesis across individual life histories. In: Behavioral Ecology. 2004 ; Vol. 15, No. 5. pp. 722-728.
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