Linked Life Data

15555511

Source:http://linkedlifedata.com/resource/pubmed/id/15555511

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2004-11-23
pubmed:abstractText
Natural variation in circulating testosterone is thought to play a role in creating inter- and intraspecific variation in paternal care in birds. Experimental elevation of plasma testosterone in males has reduced rates of male care in many species. However, a small number of studies suggest that male care is not inhibited by testosterone when there appears to be strong selection for male care. Both genetic monogamy and male incubation are thought to be the result of selection for biparental care, yet the sensitivity of male care to inhibition by T had not been examined in a species with both characteristics. Male blue-headed vireos have been shown to be strictly monogamous and provide extensive parental care, including incubation. Males received subcutaneous implants of testosterone, flutamide (an anti-androgen), or empty controls. Consistent with previous studies, testosterone treatment decreased the relative contribution to incubation by males and increased the average duration that the nest was left unattended during incubation, relative to control and flutamide treatments. The relative and absolute rates of feeding offspring and nest sanitation by T-treated males also decreased relative to controls. Flutamide-treated males incubated eggs and brooded young more than testosterone-treated males, with control males performing at intermediate values. Testosterone-treated males sang more often and at higher rates, and flutamide-treated males sang less often, than controls. These results demonstrate that even in a strictly monogamous songbird with biparental incubation, all forms of paternal care remain sensitive to elevated plasma testosterone, suggesting a shift from parental effort to mating effort.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0018-506X
pubmed:author
pubmed:issnType
Print
pubmed:volume
46
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
678-83
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Exogenous testosterone inhibits several forms of male parental behavior and stimulates song in a monogamous songbird: the blue-headed vireo (Vireo solitarius).
pubmed:affiliation
Department of Biology, Framingham State College, Framingham, MA 01701, USA. bvanroo@frc.mass.edu
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't