About the Authors

Martha M. Robbins

robbins@eva.mpg.de

Affiliation Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany

Markye Gray

Affiliation The International Gorilla Conservation Programme, Kigali, Rwanda

Katie A. Fawcett

Affiliation Dian Fossey Gorilla Fund International, Atlanta, Georgia, United States of America

Felicia B. Nutter

Affiliation Mountain Gorilla Veterinary Program, School of Veterinary Medicine, University of California Davis, Davis, California, United States of America

Prosper Uwingeli

Affiliation Parc National des Volcans, Rwanda Development Board, Gishushu, Kigali, Rwanda

Innocent Mburanumwe

Affiliation Parc National des Virunga-sud, Institut Congolais pour la Conservation de la Nature, IGCP-DRC, Gisenyi, Rwanda

Edwin Kagoda

Affiliation Mgahinga Gorilla National Park, Uganda Wildlife Authority, Kampala, Uganda

Augustin Basabose

Affiliation The International Gorilla Conservation Programme, Kigali, Rwanda

Tara S. Stoinski

Affiliations Dian Fossey Gorilla Fund International, Atlanta, Georgia, United States of America, Zoo Atlanta, Atlanta, Georgia, United States of America

Mike R. Cranfield

Affiliation Mountain Gorilla Veterinary Program, School of Veterinary Medicine, University of California Davis, Davis, California, United States of America

James Byamukama

Affiliation The International Gorilla Conservation Programme, Kigali, Rwanda

Lucy H. Spelman

Affiliation Mountain Gorilla Veterinary Program, School of Veterinary Medicine, University of California Davis, Davis, California, United States of America

Andrew M. Robbins

Affiliation Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany

Competing Interests

One author is affiliated with Zoo Atlanta. Zoo Atlanta is a non-profit 501(c) 3 and therefore there are no competing interests. The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MMR. Analyzed the data: MMR MG AMR FBN. Contributed reagents/materials/analysis tools: KAF TSS PU EK IM MG AB JB MRC FBN LHS. Wrote the paper: MMR AMR.