Results 221 to 230 of about 29,536 (262)
Bioactive properties of plant species ingested by chimpanzees (Pan troglodytes schweinfurthii) in the Kibale National Park, Uganda. [PDF]
, 2006 Sabrina Krief +6 more
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Menstrual Cycles Continue into Advanced Old Age in the Common Chimpanzee(Pan troglodytes)1
, 2008 Agnès Lacreuse +7 more
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Ebola and the decline of gorilla Gorilla gorilla and chimpanzee Pan troglodytes populations in Minkebe Forest, north-eastern Gabon [PDF]
Oryx, 2003 Bas Huijbregts +3 more
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Summation in the chimpanzee (Pan troglodytes).
Journal of Experimental Psychology: Animal Behavior Processes, 1987In this research, we asked whether 2 chimpanzee (Pan troglodytes) subjects could reliably sum across pairs of quantities to select the greater total. Subjects were allowed to choose between two trays of chocolates. Each tray contained two food wells. To select the tray containing the greater number of chocolates, it was necessary to sum the contents of
E. Sue Savage-Rumbaugh +2 more
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Addendum to "Summation in the chimpanzee (Pan troglodytes)."
Journal of Experimental Psychology: Animal Behavior Processes, 1988Rumbaugh, Savage-Rumbaugh, and Hegel (1987) reported that two chimpanzees (Pan troglodytes) could select, with better than 90% accuracy, the greater of two paired quantities of chocolate chips. In that study, no one quantity of chocolates (from 0 through 5) was used in both pairs on a given trial.
E. S. Savage-Rumbaugh +2 more
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The Function and Determinants of Reconciliation in Pan troglodytes [PDF]
International Journal of Primatology, 2009 Reconciliation (the postconflict affiliative reunion between former opponents) may mitigate costs of aggressive conflict by repairing the opponents' relationship and reducing stress. We showed that postconflict levels of self-directed behavior were lower after reconciliation than when reconciliation did not occur in chimpanzees (Pan troglodytes) at ...
Fraser, Orlaith N. +2 more
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Memory of movies by chimpanzees (Pan troglodytes).
Journal of Comparative Psychology, 2001How do animals remember what they see in daily life? The processes involved in remembering such visual information may be similar to those used in interpreting moving images on a monitor. In Experiment 1, 4 adult chimpanzees (Pan troglodytes) were required to discriminate between movies using a movie-to-movie matching-to-sample task.
Naruki Morimura, Tetsuro Matsuzawa
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A vocabulary test for chimpanzees (Pan troglodytes).
Journal of Comparative Psychology, 1984Chimpanzees can communicate in American Sign Language (ASL) to independent human observers whose only source of information is the ASL signs of the chimpanzees. A vocabulary test was presented to 4 cross-fostered chimpanzees (4-6 years old). Thirty-five-millimeter color slides were projected on a screen that could be seen by the chimpanzee subject but ...
R. Allen Gardner, Beatrix T. Gardner
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International Journal of Paleopathology, 2012
The prevalence and pattern of periodontal and periapical dental abscess lesions are examined in 399 wild caught chimpanzee mandibles and maxillae from museum contexts (138 Pan troglodytes troglodytes, 152 Pan troglodytes schweinfurthii and 109 Pan paniscus). This study tests two predictions.
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The prevalence and pattern of periodontal and periapical dental abscess lesions are examined in 399 wild caught chimpanzee mandibles and maxillae from museum contexts (138 Pan troglodytes troglodytes, 152 Pan troglodytes schweinfurthii and 109 Pan paniscus). This study tests two predictions.
openaire +3 more sources