Cultures in chimpanzees
- A. Whiten, J. Goodall, C. Boesch
- BiologyNature
- 17 June 1999
It is found that 39 different behaviour patterns, including tool usage, grooming and courtship behaviours, are customary or habitual in some communities but are absent in others where ecological explanations have been discounted.
CHARTING CULTURAL VARIATION IN CHIMPANZEES
- A. Whiten, J. Goodall, C. Boesch
- Psychology
- 2001
Cultural variation among chimpanzee communities or unit-groups at nine long-term study sites was charted through a systematic, collaborative procedure in which the directors of the sites first agreed…
Aging and Fertility Patterns in Wild Chimpanzees Provide Insights into the Evolution of Menopause
- M. E. Thompson, J. Jones, R. Wrangham
- BiologyCurrent Biology
- 18 December 2007
Age‐specific birth rate and lifetime reproductive success of chimpanzees at Bossou, Guinea
- Y. Sugiyama
- MedicineAmerican Journal of Primatology
- 1994
Preliminary calculations of the age‐specific birth rate for wild female chimpanzees were based on demographic records from a long‐term study at Bossou, Republic of Guinea, and found that the lifetime reproductive success must be less than the minimum reproductive success required for continued survival of the population.
The Flora of Bossou: Its Utilization by Chimpanzees and Humans
- Y. Sugiyama, J. Koman
- Environmental Science, Biology
- 1 November 1992
Almost 664 plant species from 392 genera have been identified and listed as the flora of Bossou, in the south-eastern corner of the Republic of Guinea, but due to destruction of forest, 60% of the 265 tree species identified were small trees of less than 10m in height.
Carrying of dead infants by Japanese macaque (Macaca fuscata) mothers
- Y. Sugiyama, H. Kurita, Takeshi Matsui, Satoshi Kimoto, T. Shimomura
- Medicine
- 1 August 2009
The quantitative and demographic features of infant-corpse-carrying behavior in Japanese macaques at Takasakiyama, southern Japan, have been studied over 24 years and some females persist in exhibiting behaviors performed towards live infants but the exact reasons for this are unclear at present.
Observations on the population dynamics and behavior of wild chimpanzees at Bossou, Guinea, in 1979–1980
- Y. Sugiyama
- PsychologyPrimates
- 1 October 1981
It is clear that hunting and meateating are not habitual but accidental among the chimpanzees of Bossou and the high social cohesion of this group and related behavior patterns changed little between the studies in spite of the disappearance of dominant and other males.
Demographic parameters and life history of chimpanzees at Bossou, Guinea.
- Y. Sugiyama
- Biology, PsychologyAmerican Journal of Physical Anthropology
- 1 June 2004
The rate of disappearance from Bossou dramatically increases during the adolescent stage, and most young chimpanzees disappear before or around maturation, and the lifetime reproductive success of Bossou chimpanzees is estimated to be highest among long-term study sites.
Behavioural Diversity in Chimpanzees and Bonobos: Multivariate and phylogenetic approaches to understanding chimpanzee and bonobo behavioral diversity
- D. Doran, W. Jungers, Y. Sugiyama, J. Fleagle, C. Heesy
- Biology
- 1 August 2002
To date, no study has quantitatively examined the combined influence of ecology, habitat, demography, and phylogeny on behavior.
Hand preference and tool use in wild chimpanzees
- Y. Sugiyama, T. Fushimi, O. Sakura, T. Matsuzawa
- Psychology, BiologyPrimates
- 1 April 1993
The differential and complementary use of both hands may be a prime factor promoting exclusive hand preference in chimpanzees comparable to that of humans.
...
...