File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Scopus: eid_2-s2.0-0034036951
- WOS: WOS:000088445500004
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Ectoparasites of house sparrows (Passer domesticus): An experimental test of the immunocompetence handicap hypothesis and a new model
Title | Ectoparasites of house sparrows (Passer domesticus): An experimental test of the immunocompetence handicap hypothesis and a new model |
---|---|
Authors | |
Keywords | Immunocompetence Sexual selection Steroid hormones Ectoparasites House sparrows |
Issue Date | 2000 |
Citation | Behavioral Ecology and Sociobiology, 2000, v. 47, n. 4, p. 230-242 How to Cite? |
Abstract | Conspicuous secondary sexual traits may have evolved as handicap-revealing signals or as badges of status. We present results of an experiment using males of the sexually dimorphic house sparrow (Passer domesticus), that support the idea that the male-specific bib can be both a handicap-revealing signal and a reliable badge indicating the physical condition of the bird. In a test of the immunocompetence handicap hypothesis, wild-caught adult male house sparrows were studied in captivity. Birds implanted with elevated doses of testosterone were more dominant, had higher circulating levels of both testosterone and corticosterone and they also harboured relatively larger ectoparasite loads. Higher parasite loads were also associated with individuals showing lower immunocompetence and larger changes in bib size. A new model for immunocompetence effects in sexual selection is introduced, integrating actions that the hypothalamopituitary axis exerts on gonads, adrenals and the thyroid gland. The 'integrated immunocompetence model' synthesizes both the 'handicap' (i.e. survival-decreasing) and 'badge of status' (i.e. survival-enhancing) models for evolution of secondary sexual traits. |
Persistent Identifier | http://hdl.handle.net/10722/230701 |
ISSN | 2023 Impact Factor: 1.9 2023 SCImago Journal Rankings: 0.803 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Poiani, A. | - |
dc.contributor.author | Goldsmith, A. R. | - |
dc.contributor.author | Evans, M. R. | - |
dc.date.accessioned | 2016-09-01T06:06:35Z | - |
dc.date.available | 2016-09-01T06:06:35Z | - |
dc.date.issued | 2000 | - |
dc.identifier.citation | Behavioral Ecology and Sociobiology, 2000, v. 47, n. 4, p. 230-242 | - |
dc.identifier.issn | 0340-5443 | - |
dc.identifier.uri | http://hdl.handle.net/10722/230701 | - |
dc.description.abstract | Conspicuous secondary sexual traits may have evolved as handicap-revealing signals or as badges of status. We present results of an experiment using males of the sexually dimorphic house sparrow (Passer domesticus), that support the idea that the male-specific bib can be both a handicap-revealing signal and a reliable badge indicating the physical condition of the bird. In a test of the immunocompetence handicap hypothesis, wild-caught adult male house sparrows were studied in captivity. Birds implanted with elevated doses of testosterone were more dominant, had higher circulating levels of both testosterone and corticosterone and they also harboured relatively larger ectoparasite loads. Higher parasite loads were also associated with individuals showing lower immunocompetence and larger changes in bib size. A new model for immunocompetence effects in sexual selection is introduced, integrating actions that the hypothalamopituitary axis exerts on gonads, adrenals and the thyroid gland. The 'integrated immunocompetence model' synthesizes both the 'handicap' (i.e. survival-decreasing) and 'badge of status' (i.e. survival-enhancing) models for evolution of secondary sexual traits. | - |
dc.language | eng | - |
dc.relation.ispartof | Behavioral Ecology and Sociobiology | - |
dc.subject | Immunocompetence | - |
dc.subject | Sexual selection | - |
dc.subject | Steroid hormones | - |
dc.subject | Ectoparasites | - |
dc.subject | House sparrows | - |
dc.title | Ectoparasites of house sparrows (Passer domesticus): An experimental test of the immunocompetence handicap hypothesis and a new model | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.scopus | eid_2-s2.0-0034036951 | - |
dc.identifier.volume | 47 | - |
dc.identifier.issue | 4 | - |
dc.identifier.spage | 230 | - |
dc.identifier.epage | 242 | - |
dc.identifier.isi | WOS:000088445500004 | - |
dc.identifier.issnl | 0340-5443 | - |