Funding for this research was provided by:
Leakey Foundation
Wenner-Gren Foundation (20110146)
National Science Foundation (1122321)
Article History
Received: 5 June 2015
Accepted: 30 August 2015
First Online: 19 September 2015
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.