The Library
Yolk androgen deposition without an energetic cost for female rockhopper penguins : a compensatory strategy to accelerate brood reduction?
Tools
Poisbleau, M., Carslake, David, Demongin, L., Eens, M., Chastel, O. and Quillfeldt, P. (2011) Yolk androgen deposition without an energetic cost for female rockhopper penguins : a compensatory strategy to accelerate brood reduction? Biology Letters, Vol.7 (No.4). pp. 605-607. doi:10.1098/rsbl.2010.1134 ISSN 1744-9561.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://dx.doi.org/10.1098/rsbl.2010.1134
Abstract
Whether androgen deposition in eggs is physiologically costly for female birds has remained a crucial but unsolved question, despite a broad use of this assumption in functional studies. We tested whether females depositing high androgen concentrations experienced higher mass losses than females depositing low androgen concentrations. Analysing female body mass change during egg formation in rockhopper penguins (Eudyptes chrysocome chrysocome), we observed no energetic cost to androgen deposition. Nevertheless, lighter females laid eggs with higher yolk androgen concentrations. This relationship existed only for the second-laid egg (B-egg), but not for the first-laid egg (A-egg). Since the B-egg is usually the first to hatch and the only one to produce a fledging chick, we hypothesize that differential yolk androgen deposition may be an adaptive strategy for females to affect brood reduction.
Item Type: | Journal Article | ||||
---|---|---|---|---|---|
Subjects: | Q Science > QL Zoology Q Science > QP Physiology |
||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
Library of Congress Subject Headings (LCSH): | Egg yolk, Androgens, Penguins, Animal clutches | ||||
Journal or Publication Title: | Biology Letters | ||||
Publisher: | Royal Society | ||||
ISSN: | 1744-9561 | ||||
Official Date: | 23 August 2011 | ||||
Dates: |
|
||||
Volume: | Vol.7 | ||||
Number: | No.4 | ||||
Page Range: | pp. 605-607 | ||||
DOI: | 10.1098/rsbl.2010.1134 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Funder: | Deutsche Forschungsgemeinschaft (DFG) | ||||
Grant number: | Qu 148/1-ff (DFG) |
Data sourced from Thomson Reuters' Web of Knowledge
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |