摘要:

The areal patterns of the telencephalic cortices of Galago demidovii and Microcebus murinus were compared. A very similar pattern was found in both species. This striking similarity is considered a further argument for the newly proposed phylogenetic relationship of cheirogaleids and galagos.

ISSN:0015-5713    

DOI:10.1159/000155932

出版商:S. Karger AG    

年代:1980

数据来源: Karger

摘要:

A chimpanzee blood group system is defined by a set of isoimmune antisera, anti-Rc, anti-Cc, anti-Ec, anti-Fc, anti-cc and anti-cc1 that distinguish 19 blood types. Population analysis of 285 unrelated animals and the study of 21 chimpanzee families support the postulated model of inheritance by 9 allelic genes. There is a close relationship between the R-C-E-F blood group system and human Rh-Hr blood groups as indicated by overall structural resemblance of both systems and by serological similarity of their principal antigens, Rc and Rho. There are indications that R-like structures are also present on the red cells of other anthropoid apes, and possibly on those of the Old World monkeys.

ISSN:0015-5713    

DOI:10.1159/000155933

出版商:S. Karger AG    

年代:1980

数据来源: Karger

摘要:

Behaviors in relation with water are described in detail for wild chimpanzees of the Mahale Mountains, Tanzania: drinking, wading streams, feeding, responses to rain, etc. When the results are compared with those of Gombe National Park, some behavioral differences emerge: drinking directly from the lake, feeding on aquatic plants, back/shoulder rubbing behavior by making day-beds, etc. are observed only for chimpanzees of the Mahale Mountains, while sponging to obtain water is observed only for those of Gombe. These may be examples of ‘tradition drift’ in wild chimpanzees. Moreover, it is suggested that there is no innate hydrophobia among any of the African great a

ISSN:0015-5713    

DOI:10.1159/000155934

出版商:S. Karger AG    

年代:1980

数据来源: Karger

摘要:

To date, chimpanzees, orangutans, and humans are the only species which have been shown capable of recognizing themselves in mirrors. In an attempt to make the identity of the reflection more explicit we report two experiments in which rhesus monkeys were given paired access to a common mirror over an extended period. While developmental differences in mirror behavior were obtained, signs of self-recognition failed to emerge. The results were discussed in terms of the absence in monkeys of an essential cognitive category for processing mirrored information about the self.

ISSN:0015-5713    

DOI:10.1159/000155935

出版商:S. Karger AG    

年代:1980

数据来源: Karger

摘要:

Vervet troops are not closed units and migration – both into and out of the troop – occurs regularly. Available data suggest that it is a male phenomenon related to the accessibility of adult females. The process and its implications are discus

ISSN:0015-5713    

DOI:10.1159/000155936

出版商:S. Karger AG    

年代:1980

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000155937

出版商:S. Karger AG    

年代:1980

数据来源: Karger