Results 311 to 320 of about 124,137 (361)
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Nature, 1999
As an increasing number of field studies of chimpanzees (Pan troglodytes) have achieved long-term status across Africa, differences in the behavioural repertoires described have become apparent that suggest there is significant cultural variation. Here we present a systematic synthesis of this information from the seven most long-term studies, which ...
A, Whiten +8 more
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As an increasing number of field studies of chimpanzees (Pan troglodytes) have achieved long-term status across Africa, differences in the behavioural repertoires described have become apparent that suggest there is significant cultural variation. Here we present a systematic synthesis of this information from the seven most long-term studies, which ...
A, Whiten +8 more
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Science, 2023
Signs of menopause in wild chimpanzees provide insights into human ...
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Signs of menopause in wild chimpanzees provide insights into human ...
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1992
Abstract Three subspecies are recognized: P.t. verus, the western chimpanzee; P.t. troglodytes, the central chimpanzee; and P.t. schweinfurthi, the eastern chimpanzee. Lee et al. (1988) and the IUCN (1990) classified the western subspecies, which occurs from Senegal to Nigeria, as endangered, and the other two which are found from ...
James K Kirkwood, Katherine Stathatos
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Abstract Three subspecies are recognized: P.t. verus, the western chimpanzee; P.t. troglodytes, the central chimpanzee; and P.t. schweinfurthi, the eastern chimpanzee. Lee et al. (1988) and the IUCN (1990) classified the western subspecies, which occurs from Senegal to Nigeria, as endangered, and the other two which are found from ...
James K Kirkwood, Katherine Stathatos
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Nature, 2005
There are thousands of fossils of hominins, but no fossil chimpanzee has yet been reported. The chimpanzee (Pan) is the closest living relative to humans. Chimpanzee populations today are confined to wooded West and central Africa, whereas most hominin fossil sites occur in the semi-arid East African Rift Valley.
Sally, McBrearty, Nina G, Jablonski
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There are thousands of fossils of hominins, but no fossil chimpanzee has yet been reported. The chimpanzee (Pan) is the closest living relative to humans. Chimpanzee populations today are confined to wooded West and central Africa, whereas most hominin fossil sites occur in the semi-arid East African Rift Valley.
Sally, McBrearty, Nina G, Jablonski
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Theoretical Medicine and Bioethics, 2014
Literature on the mental capacities and cognitive mechanisms of the great apes has been silent about whether they can act autonomously. This paper provides a philosophical theory of autonomy supported by psychological studies of the cognitive mechanisms that underlie chimpanzee behavior to argue that chimpanzees can act autonomously even though their ...
Tom L, Beauchamp, Victoria, Wobber
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Literature on the mental capacities and cognitive mechanisms of the great apes has been silent about whether they can act autonomously. This paper provides a philosophical theory of autonomy supported by psychological studies of the cognitive mechanisms that underlie chimpanzee behavior to argue that chimpanzees can act autonomously even though their ...
Tom L, Beauchamp, Victoria, Wobber
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Electroencephalography and Clinical Neurophysiology, 1971
The electroencephalogram and electro-oculogram of two unrestrained juvenile chimpanzees was monitored for 7 consecutive nights using telemetry methods. Of the sleeping time, 23% was spent in the rapid eye movement of REM type of sleep, whereas 8, 4, 15, and 10% were spent in non-REM stages 1 through 4, respectively.
F R, Freemon, J J, McNew, W R, Adey
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The electroencephalogram and electro-oculogram of two unrestrained juvenile chimpanzees was monitored for 7 consecutive nights using telemetry methods. Of the sleeping time, 23% was spent in the rapid eye movement of REM type of sleep, whereas 8, 4, 15, and 10% were spent in non-REM stages 1 through 4, respectively.
F R, Freemon, J J, McNew, W R, Adey
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Inclusive chimpanzee conservation
Science, 2019![Figure][1] The proximity of chimpanzee populations to human activity is just one factor in conservation priorities. PHOTO: © SHAH, ANUP/ANIMALS ANIMALS In their Report “Human impact erodes chimpanzee behavioral diversity” (29 March, p. [1453][2]), H. S. Kuhl et al.
Kimberley J, Hockings +1 more
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Chimpanzee ethnography reveals unexpected cultural diversity
Nature Human Behaviour, 2020C. Boesch +36 more
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Journal of Applied Animal Welfare Science, 1999
The subject of sanctuaries for chimpanzees has lately become the topic of a great deal of discussion (Brent, Butler, & Haberstroh, 1997; Committee on Long-Term Care of Chimpanzees, 1997; Dyke, Williams-Blangero, Mamelka, & Goodwin, 1995; Peterson & Goodall, 1993).
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The subject of sanctuaries for chimpanzees has lately become the topic of a great deal of discussion (Brent, Butler, & Haberstroh, 1997; Committee on Long-Term Care of Chimpanzees, 1997; Dyke, Williams-Blangero, Mamelka, & Goodwin, 1995; Peterson & Goodall, 1993).
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Trends in Cognitive Sciences, 2001
In the late 1970s, Premack and Woodruff asked whether chimpanzees had a theory of mind. The answer to this question has remained elusive. Whereas some authors argue that chimpanzees are capable of mental state attribution, others maintain that they simply learn certain cues in ertain situations. Recent studies challenge both views.
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In the late 1970s, Premack and Woodruff asked whether chimpanzees had a theory of mind. The answer to this question has remained elusive. Whereas some authors argue that chimpanzees are capable of mental state attribution, others maintain that they simply learn certain cues in ertain situations. Recent studies challenge both views.
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