Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

The dark side of the red ape: male-mediated lethal female competition in Bornean orangutans

There are no MPG-Authors in the publication available
External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Marzec, A. M., Kunz, J. A., Falkner, S., Atmoko, S. S. U., Alavi, S. E., Modawer, A. M., et al. (2016). The dark side of the red ape: male-mediated lethal female competition in Bornean orangutans. Behavioral Ecology and Sociobiology, 70(4), 459-466. doi:10.1007/s00265-015-2053-3.

Cite as: https://hdl.handle.net/21.11116/0000-0005-5C7F-7
Female Bornean orangutans (Pongo pygmaeus wurmbii) are mainly solitary and philopatric, leading to adult female relatives sharing adjacent and overlapping home ranges. Females tend to be intolerant of unrelated females, with whom they also may have overlapping home ranges. However, fights that lead to injuries are extremely rare and lethal aggression had never been observed. Here, we report the first case of lethal female-female aggression during over 26,000 h of focal data collected on adult females at Tuanan, Central Kalimantan: A young female, who had recently lost her infant, attacked an old resident female. The interaction’s unique feature was that the attacking female was supported by an unflanged male, who had been in consort with her during the week preceding the attack and was responsible for the lethal injuries to the victim. The victim received protection from a flanged male who was probably attracted to the noise generated by the fight. We conclude that even in a species in which coercion is frequently observed in male-female interactions, female leverage over males can coax males into providing services, such as coalitionary support.