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Primates

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Reaction to allospecific death and to an unanimated gorilla infant in wild western gorillas: insights into death recognition and prolonged maternal carrying

  • Shelly MasiEmail author
Special Feature: Original Article Responses to Death and Dying: Primates and Other Mammals

Abstract

It is still unclear to what extent animals possess knowledge of death. Primates display a large variety and often contradictory behaviors toward conspecific corpses, particularly those of infants (e.g., prolonged carrying and care). This study reports on reactions in a wild, habituated western gorilla group (Gorilla gorilla, 11–13 individuals) in the Central African Republic to an unanimated conspecific infant, and to an allospecific corpse. Individuals’ reactions were compared to their usual behavior using both continuous focal animal sampling and 10-min instantaneous scan sampling. In the first observation, an infant gorilla fell out of a tree and looked dead. The mother retrieved it and remained unusually close to another adult female, until the infant started to move again, almost 1 h later. Cases of infants regaining consciousness after almost-fatal accidents may act as positive reinforcement for continued carrying by mothers, which might be socially learned. In the second case, three immature gorillas reacted to a dead red river hog. For 20 min they stared at the corpse from tree branches above, while chest beating, defecating, and urinating several times. They showed fear and did not approach the corpse. These observations show that non-predatory species, such as gorillas, may be able to acquire and develop some knowledge about death even though they do not kill other vertebrates.

Keywords

Thanatology Prolong maternal carrying Death consciousness Reaction to dead allospecifics Western gorillas 

Notes

Acknowledgements

I thank Dr. James Anderson for the invitation to contribute to this special issue and for the careful editing of the manuscript. I thank the Ministers of Education and Water and Forests, Fishing and Hunting of the Central African Republic (CAR) government for permission to conduct this research. I am grateful to Angelique Todd of WWF CAR, at that time managing the Primate Habituation Program of Dzanga-Sangha Protected Areas (DSPA) and to the Administration of DSPA, and the Bai-Hokou staff in CAR for facilitating logistics and permissions. I thank Damien Caillaud and an anonymous reviewer for very useful comments on the manuscript. I thank the Muséum national d’Histoire naturelle, ATM (Action Transversale du Muséum), and Sabrina Krief and the ANR JC SAFAPE for their institutional and financial support. Special thanks go to the Aka trackers for their courageous and essential work.

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© Japan Monkey Centre and Springer Japan KK, part of Springer Nature 2019

Authors and Affiliations

  1. 1.UMR 7206 Eco-anthropologieMuséum National d’Histoire Naturelle, CNRS, Université Paris Diderot, Musée de l’HommeParisFrance

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