Multimodal begging signals reflect independent indices of nestling condition in European starlings
Parental food allocation decisions are based on information about nestling condition conveyed by begging signals. It is expected that parents should have evolved the ability to obtain detailed information about their nestlings' condition through multiple independent signals, thus allowing them to use optimal food allocation strategies depending on resource availability. In this study, we explore 1) which components of acoustic and visual begging signals produced by European starling nestlings (Sturnus vulgaris) vary independently from each other and consequently have evolved as separate signals and 2) whether these multimodal signals convey multiple or redundant information about nestling condition. We measured nestling stature and an estimate of lipid reserves, 2 independent indices of nestling phenotypic quality that have been suggested to be used in parental food allocation decisions. In multivariate analyses, we show that 1) acoustic and visual begging signals consist of several components that vary independently from each other and that 2) begging components correlated with nestling lipid reserves were different from those correlated with stature. Our results show that nestling begging signals include independent components in multimodal sensory channels that can provide parents with information about 2 independent indices of nestling condition that could be used by parents for flexible allocation strategies when facing changing environmental conditions. Copyright 2011, Oxford University Press.
If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.
Volume (Year): 22 (2011)
Issue (Month): 6 ()
|Contact details of provider:|| Postal: |
Fax: 01865 267 985
Web page: http://beheco.oxfordjournals.org/
|Order Information:||Web: http://www.oup.co.uk/journals|
When requesting a correction, please mention this item's handle: RePEc:oup:beheco:v:22:y:2011:i:6:p:1249-1255. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Oxford University Press)or (Christopher F. Baum)
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If references are entirely missing, you can add them using this form.
If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.
Please note that corrections may take a couple of weeks to filter through the various RePEc services.