Funding for this research was provided by:
U.S. Fish and Wildlife Service (AFE-0534)
Robert G. and Jane V. Engle Foundation
Lisa Yang
Article History
Received: 8 September 2017
Revised: 22 January 2018
Accepted: 24 January 2018
First Online: 8 February 2018
Compliance with ethical standards
:
: This work was carried out using a non-invasive method, which required no direct observations or contact with the animals. This research was conducted in accordance with the national laws of the Republic of Gabon. Research clearance was approved by the Gabon government’s Centre National de la Recherché Scientifique et Technologique.
: The authors declare that they have no conflicts of interest.