Funding for this research was provided by:
National Geographic Society
National Science Foundation (OCE-1536794)
Text and Data Mining valid from 2018-11-20
Received: 19 July 2018
Accepted: 12 November 2018
First Online: 20 November 2018
Compliance with ethical standards
: All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of Silliman University, Arkansas State University, North-West University, and the Government of the Philippines.
: The authors declare that they have no conflict of interest.