About the Authors

Thomas Breuer

To whom correspondence should be addressed. E-mail: breuer@eva.mpg.de

Affiliations Wildlife Conservation Society, Mbeli Bai Study, Nouabalé-Ndoki Project, Brazzaville, Republic of Congo, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany

Mireille Ndoundou-Hockemba

Affiliation Wildlife Conservation Society, Mbeli Bai Study, Nouabalé-Ndoki Project, Brazzaville, Republic of Congo

Vicki Fishlock

Affiliation Wildlife Conservation Society, Mbeli Bai Study, Nouabalé-Ndoki Project, Brazzaville, Republic of Congo

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

TB conceived and designed the study. TB, MNH, and VF performed the study. TB analyzed the data and contributed reagents/materials/analysis tools. TB and VF wrote the paper.