#Western lowland gorilla intelligence plus#

Self-recognition in chimpanzees and orangutans but not gorillas. Anthropologie Naïve, Anthropologie Savante. Reaching into Thought: The Minds of the Great Apes Cambridge Univ. In: Selfawareness in Animals and Humans: Developmental Perspectives, Parker, S. Self-recognition and self-awareness in lowland gorillas. Object manipulation, tool use and sensorimotor intelligence as feeding adaptations in Cebus monkeys and great apes. In: Self-awareness in Animals and Humans: Developmental Perspectives, Parker, S. Incipient mirror-self-recognition in zoo gorillas and chimpanzees. The behaviour and ecology of wild orangutans ( Pongo pygmaeus). Food exchange strategies in an infant chimpanzee. In: Primate Biosocial Development, Chevalier-Skolnikoff, S. Orangutan maturation: growing up in a female world. Variation in subsistence activities of female and male pongids. Observations of spontaneous tool making and tool use in a captive group of Western Lowland Gorillas ( Gorilla gorilla gorilla). Western lowland gorillas, G.g.gorilla, have suffered exceptionally high. Preliminary data on voluntary food sharing in brown capuchin monkeys. their size, strength and intelligence, gorillas face almost no major threats. Appeasement, celebration, and food sharing in the two Pan species. Food sharing and reciprocal obligations among chimpanzees. Influences sociales sur l'acquisition et l'utilisation d'informations relatives à la recherche de nourriture dans un groupe de Cercocèbes ( Cercocebus t. Inter-individual spatial proximity in two captive groups of western lowland gorillas (Gorilla g. Cooperative problem solving by orangutans ( Pongo pygmaeus). Cooperation in primates: critical analysis of behavioural criteria. Do chimpanzees cooperate in a learning task? Primates, 35: 385–392.Ĭhalmeau, R. In: Reaching into Thought: The Minds of the Great Apes, Russon, A. The misunderstood ape: cognitive skills of the gorilla. Gorillas were previously thought to be a single species with three subspecies (Western lowland, eastern lowland, and mountain gorillas), but it is now agreed that there are two main species, the Western gorilla, (Gorilla gorilla) and the Eastern gorilla (Gorilla beringei), and they each have two subspecies. Hunting behavior of wild chimpanzees in the Taï national park. Acquisition by a pigtail macaque of behavior patterns beyond the natural repertoire of the species. Garland STPM Press, New York.īertrand, M. Animal Tool Behavior: The Use and Manufacture of Tools by Animals. In: “Language” and Intelligence in Monkeys and Apes, Parker, S. “Social tool use” by free-ranging orangutans: a Piagetian and developmental perspective on the manipulation of an animate object. Results showed that (1) naive gorillas are able to get a reward (D) in an experimental exchange situation and (2) the complex rules of multiple successive exchanges were not easily understood by gorillas.īard, K. Different types of errors were scored, as well as social constraints on learning. Double exchange (give B to receive C, then give back C to obtain D) was performed only by three individuals and triple exchange (give A to receive B, give back B to receive C, then give back C to obtain D) was performed only by two individuals. Simple exchange (give C to obtain D) was the first procedure and six gorillas out of nine succeeded. After that familiarization with giving behaviour, two kinds of exchanges, of increasing complexity, were tested with gorillas. The use of tools by gorillas was first recorded in 2005 and this involved the western lowland gorillas in the Republic of the Congo. Four individuals out of nine performed active giving. Gorilla intelligence can be measured using their ability to turn natural materials into tools that can assist them in performing different roles. Before the exchange itself, individuals had to learn to give an item to the experimenter.

gorilla) to exchange objects with a human partner. Learn more about how we are helping western lowland gorillas.An experiment was carried out to assess the ability of captive western lowland gorillas ( Gorilla g. Additionally, through the Saint Louis Zoo WildCare Institute Center for the Conservation of Congo Apes, we are developing conservation policies and local leadership to ensure the long-term survival of chimpanzees and gorillas in the Congo Basin. This is a cooperative breeding program, with a number of zoos working together to ensure the survival of the species. The Saint Louis Zoo also participates in the Species Survival Plan for western lowland gorillas. We support a bachelor troop of gorillas at the Saint Louis Zoo. Habitat destruction, the bushmeat trade, and the spread of disease are some of the problems affecting gorillas.

#Western lowland gorilla intelligence plus#

Western gorillas number only about 110,000 – most of them the western lowland subspecies, plus a few hundred of the other western subspecies, the Cross River gorilla. All types of gorillas are in serious danger of extinction in the wild.