Formation of Categories Based on Functions in a Chimpanzee (Pan troglodytes )

Numerical competence in a chimpanzee (Pan troglodytes).

A chimpanzee (Pan troglodytes), trained to count foods and objects by using Arabic numbers, demonstrated the ability to sum arrays of 0-4 food items placed in 2 of 3 possible sites. To address representational use of numbers, we next baited sites with Arabic numbers as stimuli. In both cases performance was significantly above chance from the first sessions, which suggests that without explicit...

A case of maxillary sarcoma in a chimpanzee (Pan troglodytes).

Oral malignancy is rare in chimpanzees. A 34-year-old female chimpanzee (Pan troglodytes) at Kumamoto Sanctuary, Japan, had developed it. Treatment is technically difficult for chimpanzees while malignant neoplasm is seemingly rising in captive populations. Widespread expert discussion, guidelines for treatment, especially for great apes in terminal stages is urgently needed.

Impact of Captivity on Social Bahaviour of Chimpanzee (pan Troglodytes)

Chimpanzee is the most intellectual species among the animal kingdom. One-year (2009-2010) study on Chimpanzee was conducted to access the impact of captivity on their social behavior at Lahore Zoo. The group consisted of two pairs; one adult and other sub-adult housed in two separate cages. The data was recorded by instantaneous point-sampling technique to determine the frequency, prevalence a...

Chimpanzee (Pan troglodytes) Counting in a Computerized Testing Paradigm

Uterine leiomyoma in chimpanzee (Pan troglodytes) [Leiomioma uterino em chimpanzé (Pan troglodytes)]

Recebido em 22 de julho de 2004 Aceito em 5 de setembro de 2005 *Corresponding author (autor para correspondência) E-mail: [email protected] Reports of tumors of the reproductive tract in female non-human primates are not frequent. In the literature some cases were observed in females, and they included a cervical leiomyoma, an uterine carcinoma (Mcclure and Guilloud, 1971), four ute...