摘要:

An eastern gorilla group of the Mt. Kahuzi region (République du Zaire) was studied over 15 months. Its migration route was determined, and the various biotopes it visited are described. A record was made of its main food plants, and of the plant parts eaten. For nine important food plants the protein content, the concentration of the individual amino acids and the water content were measured for the plant parts eaten and for those not eaten. For some of these plant parts the Na, K, Ca and Mg content were also determined. No general correlation between food selection and one or several of these factors could be found. The development and value of a traditionally determined mixed diet is discussed

ISSN:0015-5713    

DOI:10.1159/000155686

出版商:S. Karger AG    

年代:1975

数据来源: Karger

摘要:

The taxonomic appraisal of Brazilian marmosets, genus Callithrix, by Coimbra-Filho and Mittermeier is critically examined. It is shown that their assertions are not supported by the evidence.

ISSN:0015-5713    

DOI:10.1159/000155687

出版商:S. Karger AG    

年代:1975

数据来源: Karger

摘要:

26 specimens of Presbytis entellus were examined for a variety of blood proteins. In contrast to previous studies of other species of leaf monkeys, our P. entellus sample proved to be very heterogeneous. Polymorphisms were found in the third component of complement, group-specific component, glycine-rich β-glycoprotein, α1-antitrypsin, phosphoglucomutase, 6-phosphogluconate dehydrogenase, adenylate kinase, superoxide dismutase, malate dehydrogenase, and phosphohexose isomerase. Variable band strengths that might represent polymorphism were found in acid phosphatase and lactate dehydrogenase. Further analyses of the P. cristatus sample studied by Barnicot and Hewett-Emmett failed to disclose variation. The interpretation of blood protein variability in relation to sample collection and population structure is discusse

ISSN:0015-5713    

DOI:10.1159/000155688

出版商:S. Karger AG    

年代:1975

数据来源: Karger

摘要:

The denticles of the sublinguae of Galago crassicaudatus and G. senegalensis are studied histologically. There are, at the oral end of the sublingua, main or primary denticles which bear on their surface the much smaller secondary denticles. Spine-like small denticles occur on the surface of the ventromedian keel also. The structure of the primary denticles is the same as of the secondary ones. The rigidity of the denticles is due to the filling of the vessels with blood. It is suggested that the denticles act as sense organs of touch as well as papillae operariae. In the latter functions they clean the lower procumbent incisors like a toothbrush.

ISSN:0015-5713    

DOI:10.1159/000155689

出版商:S. Karger AG    

年代:1975

数据来源: Karger

摘要:

Under natural light in Portland, Oreg., captive ring-tailed lemurs (Lemur catta) experience a breeding season that differs by nearly half a year from the season in Madagascar. A series of experimental day length changes from 1971 to 1974 demonstrated the ability of both temperate and tropical photoperiod cycles to induce estrous cycles in quiescent animals. After photoperiodic activation, most impregnated females failed to resume estrous cycles even after infant separations unless they received additional photo-period changes. Unimpregnated females, on the other hand, showed no significant decline in the incidence of estrous cycles under prolonged exposure to a constant day length regimen (12.0L: 12.0D) for over a year.

ISSN:0015-5713    

DOI:10.1159/000155690

出版商:S. Karger AG    

年代:1975

数据来源: Karger

摘要:

Carrying and nursing of infants were recorded in 7 groups during the first 40 days postpartum. All members of all groups participated in carrying the infants. Dominant males tended to carry most frequently, followed by mothers and nonbreeding, mostly juvenile individuals. The role of early experience in caring for infants in the development of adequate parental behavior and rearing success is discussed.

ISSN:0015-5713    

DOI:10.1159/000155691

出版商:S. Karger AG    

年代:1975

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000155692

出版商:S. Karger AG    

年代:1975

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000155693

出版商:S. Karger AG    

年代:1975

数据来源: Karger