Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Voice Breaking in Males Results in Sexual Dimorphism of Green Woodhoopoe Calls

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Behaviour

Ontogenetic changes and sexual differences in the acoustic structure of green woodhoopoe (Phoeniculus purpureus) 'kek' calls were investigated in a wild population. At fledging, the calls of males and females were indistinguishable in terms of fundamental frequency, frequency modulation, peak frequency and call duration. After 3-5 months, however, the male voice 'broke' (i.e. underwent a significant decrease in fundamental frequency), while there was no change in female call structure. Consequently, the fundamental frequency of adult male calls was 48% lower than that of adult females, and there was no overlap in the call frequencies of the sexes in adulthood. The change in male voice occurred within a 23 week period and no intermediate call frequencies were recorded. The timing of the voice break did not correspond with a change in overall body size, suggesting that growth of the syrinx was not the proximate cause. However, it did coincide with the stage in development when male bill length grew to exceed that of all females and when males began to lose their distinctive brown throat patch, providing some indirect evidence that hormonal control may be important.

10.1163/1568539041166726
/content/journals/10.1163/1568539041166726
dcterms_title,pub_keyword,dcterms_description,pub_author
6
3
Loading
Loading

Full text loading...

/content/journals/10.1163/1568539041166726
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.1163/1568539041166726
Loading

Article metrics loading...

/content/journals/10.1163/1568539041166726
2004-05-01
2016-12-09

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
     
    Behaviour — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation