The monkeys' defence alliance

  title={The monkeys' defence alliance},
  author={Robin I. M. Dunbar},

Anxiety Disorders as Evolutionary Adaptations

The chapter examines the thesis, first advanced by clinical psychologists and psychiatrists in the 1970s and 1980s, that psychiatric symptoms are rooted in our evolution history. This premise has

Issues in Development

There is little in the literature that describes the actual field practice of international development assistance. However two books written in the 1990s detailed the disappointing experiences of

Consequential Strangers and Peripheral Ties: The Importance of Unimportant Relationships

Social networks in the 21st century include a wide array of partners. Most individuals report a few core ties (primarily family) and hundreds of peripheral ties. Weak ties differ from intimate ties

Evolutionary, biological origins of morality: implications for research with human embryonic stem cells.

The evolutionary origins of morality arose as a selectively advantageous product of evolution and preceded all religions and philosophies by millions of years and bans and restrictions on research with human embryonic stem cells are patently immoral.



Why Are Diurnal Primates Living in Groups

A critical test is proposed of the hypothesis that increasing group size should lead to reduced predation risk by comparing demographic patterns between areas where predators are still present and where they have disappeared and the results provide strong support for the predation-feeding competition theory.

The formation of red colobus–diana monkey associations under predation pressure from chimpanzees

  • Ronald NoëR. Bshary
  • Biology
    Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 1997
Testing the anti–predation hypothesis with observational and experimental data on mixed–species groups of red colobus and diana monkeys in the Taï National Park, Ivory Coast found that association rates peaked during the chimpanzees' hunting season and playbacks of recordings of chimpanzee sounds induced the formation of new associations and extended the duration of existing associations.

Suppression of oestrogen-induced LH surges by social subordination in talapoin monkeys

Evidence is reported that subordination can prevent the luteinising hormone (LH) surge which is normally induced by giving oestrogen to female monkeys, thus offering an explanation for reduced fertility and suggesting that this can be induced by behavioural interactions.

Hunting behavior of wild chimpanzees in the Taï National Park.

  • C. BoeschH. Boesch
  • Environmental Science, Biology
    American journal of physical anthropology
  • 1989
Forest chimpanzees have a more specialized prey image, intentionally search for more adult prey, and hunt in larger groups and with a more elaborate cooperative level than savanna-woodlands chimpanzees, and tend to share meat more actively and more frequently.

Ecology, feeding competition and social structure in baboons

An ecological model of baboon social structure is presented which incorporates the effects of female-female competition, male-male competition, and predation pressure, and potentially accounts for wide variability in group size, group structure and social relationships within the genus Papio.