Linked Life Data

10983830

Source:http://linkedlifedata.com/resource/pubmed/id/10983830

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1451
pubmed:dateCreated
2000-12-11
pubmed:abstractText
Females may favour some offspring over others by differential deposition of yolk hormones. In American kestrels (Falco sparverius), we found that yolks of eggs laid late in the sequence of a clutch had more testosterone (T) and androstenedione (A4) than yolks of first-laid eggs. To investigate the effects of these yolk androgens on nestling 'fitness', we injected both T and A4 into the yolks of first-laid eggs and compared their hatching time, nestling growth and nestling survival with those of first-laid eggs in which we injected vehicle as a control. Compared to controls, injection of T and A4 at a dose intended to increase their levels to those of later-laid eggs delayed hatching and reduced nestling growth and survival rates. Yolk androgen treatment of egg 1 had no effect on survival of siblings hatching from subsequently laid eggs. The adverse actions of yolk androgen treatment in the kestrel are in contrast to the favourable actions of yolk T treatment found previously in canaries (Serinus canaria). Additional studies are necessary in order to determine whether the deposition of yolk androgens is an adaptive form of parental favouritism or an adverse by-product of endocrine processes during egg formation. Despite its adaptive significance, such 'transgenerational' effects of steroid hormones may have helped to evolutionarily shape the hormonal mechanisms regulating reproduction.
pubmed:grant
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/10983830-10506561, http://linkedlifedata.com/resource/pubmed/commentcorrection/10983830-1572286, http://linkedlifedata.com/resource/pubmed/commentcorrection/10983830-2074005, http://linkedlifedata.com/resource/pubmed/commentcorrection/10983830-5875340, http://linkedlifedata.com/resource/pubmed/commentcorrection/10983830-8193216, http://linkedlifedata.com/resource/pubmed/commentcorrection/10983830-8265571, http://linkedlifedata.com/resource/pubmed/commentcorrection/10983830-8900078, http://linkedlifedata.com/resource/pubmed/commentcorrection/10983830-8981585, http://linkedlifedata.com/resource/pubmed/commentcorrection/10983830-9069278, http://linkedlifedata.com/resource/pubmed/commentcorrection/10983830-9140011, http://linkedlifedata.com/resource/pubmed/commentcorrection/10983830-9245527, http://linkedlifedata.com/resource/pubmed/commentcorrection/10983830-9707477
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0962-8452
pubmed:author
pubmed:issnType
Print
pubmed:day
22
pubmed:volume
267
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1451-6
pubmed:dateRevised
2010-9-14
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Yolk androgens reduce offspring survival.
pubmed:affiliation
School of Biological Sciences, Center for Reproductive Biology, Washington State University, Pullman 99164-4236, USA. ksockman@wsu.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't