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Generation times in wild chimpanzees and gorillas suggest earlier divergence times in great ape and human evolution
- K. Langergraber, Kay Prüfer, L. Vigilant
- BiologyProceedings of the National Academy of Sciences
- 13 August 2012
The human–chimpanzee split is dated to at least 7–8 million years and the population split between Neanderthals and modern humans to 400,000–800,000 y ago, which suggests that molecular divergence dates may not be in conflict with the attribution of 6- to 7-million-y-old fossils to the human lineage and 400,,000-Y-old bones to the Neanderthal lineage.
Diana monkey long-distance calls: messages for conspecifics and predators
It is concluded that, in addition to their function in perception advertisement, diana monkey long-distance calls function as within-group semantic signals that denote different types of predators.
A syntactic rule in forest monkey communication
- K. Zuberbühler
- BiologyAnimal Behaviour
- 1 February 2002
It is indicated that wild Diana monkeys, Cercopithecus diana, may comprehend the semantic changes caused by a combinatory rule present in the natural communication of another primate, the Campbell's monkey, C. campbelli.
Campbell's Monkeys Use Affixation to Alter Call Meaning
It is concluded that, when referring to specific external events, non-human primates can generate meaningful acoustic variation during call production that is functionally equivalent to suffixation in human language.
Food sharing is linked to urinary oxytocin levels and bonding in related and unrelated wild chimpanzees
- R. Wittig, C. Crockford, T. Deschner, K. Langergraber, T. Ziegler, K. Zuberbühler
- Biology, PsychologyProceedings of the Royal Society B: Biological…
- 7 March 2014
It is proposed that food-sharing events co-opt neurobiological mechanisms evolved to support mother–infant bonding during lactation bouts, and may act as facilitators of bonding and cooperation between unrelated individuals via the oxytocinergic system across social mammals.
Leopard predation and primate evolution.
It is suggested that the principal effect of leopard predation has been on primates' cognitive evolution and that predation by leopards did not drive the evolution of these traits in the predicted way.
Wild Chimpanzees Inform Ignorant Group Members of Danger
Chimpanzee Alarm Call Production Meets Key Criteria for Intentionality
The results demonstrate that certain vocalisations of the authors' closest living relatives qualify as intentional signals, in a directly comparable way to many great ape gestures, and support a multimodal origin of human language.
The central importance of information in studies of animal communication
The Predator Deterrence Function of Primate Alarm Calls
It is concluded that the high alarm call rates to leopards are part of an anti-predator strategy in primates that may have evolved to deter predators that depend on surprise.