Food transfers in immature wild western lowland gorillas (Gorilla gorilla gorilla)
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The transfer of food items between individuals has been described in primates as serving an informative purpose in addition to supplementing the diet of immature individuals. This behaviour has yet to be described in western lowland gorillas (Gorilla gorilla gorilla), and results are presented here of observations of food transfers in immature gorillas at Mbeli Bai, Republic of Congo. The frequency of food transfers decreased with increasing immature age, while the frequency of independent feeding and processing of food increased. Transfers between mothers and infants were the most frequent, with infants attempting to take items from the mother. These attempts were not always successful and the item was relinquished on less than 50% of attempts. Mothers also took items from their offspring. The results point to the functional significance of food transfers in western lowland gorillas being informational. In a bai environment, where one species forms the majority of a visiting gorilla’s diet despite other species being available, the initiation of food transfers by immatures is proposed to serve the purpose of familiarising them with which species, and which parts of those species, may be eaten.
KeywordsFeeding behaviour Food transfers Gorilla
We thank the Ministère de l’Economie Forestière of Congo-Brazzaville and the Wildlife Conservation Society for permission to work in the Nouabalé-Ndoki National Park. We thank all staff of the Nouabalé-Ndoki Project, particularly Thomas Breuer, Emma Stokes, Mark Gately and Bryan Curran. A.A. Nowell was funded by a University of Chester Gladstone Fellowship.
- Feistner ATC, McGrew WC (1989) Food sharing in primates: a critical review. In: Seth PK, Seth S (eds) Perspectives in primate biology, vol 3. Today and Tomorrow Printers and Publishers, New Delhi, pp 21–36Google Scholar
- Hashimoto C, Furuichi T (2002) Food sharing between mother and offspring in wild bonobos at Wamba, DR Congo. Anthropol Sci 110:D21Google Scholar
- King BJ (1994) The information continuum—evolution of social information transfer in monkeys, apes, and hominids. School of American Research Press, Santa FeGoogle Scholar
- Nowell AA (2005) Behavioural development in wild western lowland gorillas (Gorilla gorilla gorilla). Unpublished PhD thesis, University of LiverpoolGoogle Scholar
- Parnell RJ (2002b) The social structure and behaviour of western lowland gorillas (Gorilla gorilla gorilla) at Mbeli Bai, Republic of Congo Unpublished PhD thesis, University of StirlingGoogle Scholar
- Pereira ME, Altmann J (1985) Development of social behavior in free-living non-human primates. In: Watts ES (eds) Nonhuman primate models for growth and development. Liss, New York, pp 217–309Google Scholar
- Trivers R (1972) Parental investment and sexual selection. In: Campbell B (eds) Sexual selection and the descent of man 1871–1971. Heinemann, Chicago, pp 136–179Google Scholar