摘要:

Information on the chemical composition of baboon foods from the Laikipia Plateau, Kenya, is presented. Despite some differences in methods, results of analyses performed on the same foods at different sites were found to be extremely consistent, encouraging the view that meaningful intra- and interspecific comparisons of diet selection are feasible. Contrary to assumptions in the literature, no relationship between the abundance of food types and their chemical composition was found, nor was the foliage eaten by the baboons found to be a low-quality or high-fibre item in comparison with fruits and storage organs. Emphasis is placed on the need for caution in the use of simplistic dietary taxonomies which imply phyto-chemical and ecological homogeneity within broad food categories. Comparisons between three species revealed marked differences in the chemical composition of their diets; in particular, baboon diets were found to be higher in protein and lower in fibre than those of either lowland gorillas or Malaysian leaf monkeys, and differences in condensed tannin levels were also found. The relationship between these differences and the socio-ecology of the three species is discussed.

ISSN:0015-5713    

DOI:10.1159/000156722

出版商:S. Karger AG    

年代:1993

数据来源: Karger

摘要:

The ecological model of Carel van Schaik provides clear predictions for female-female relationships in relation to scramble or contest within-group competition and contest between-group competition. These predictions were applied to data from a 12-year field study on Hanuman langurs (Presbytis entellus) that ranged freely around Jodhpur (India). It appears that hierarchical relationships between females (unstable, inconsistent, individualistic, with low rates of agonistic coalitions) reflect scramble within-group competition. Such competition, however, results in individual evolutionary advantages (differential feeding time; differential reproductive success) so that dominance effects mirror contest within-group competition. Between-group contest competition at Jodhpur is strong (low predator pressure, high population density, good food defensibility, essential role of females during intergroup encounters, loud vocalization of males). The results are discussed in the light of langur feeding habits.

ISSN:0015-5713    

DOI:10.1159/000156723

出版商:S. Karger AG    

年代:1993

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156724

出版商:S. Karger AG    

年代:1993

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156725

出版商:S. Karger AG    

年代:1993

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156726

出版商:S. Karger AG    

年代:1993

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156727

出版商:S. Karger AG    

年代:1993

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156728

出版商:S. Karger AG    

年代:1993

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156729

出版商:S. Karger AG    

年代:1993

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156730

出版商:S. Karger AG    

年代:1993

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156731

出版商:S. Karger AG    

年代:1993

数据来源: Karger