摘要:

This study is part of a long-term ecological study of habitat and dietary requirements of the pied bare-face tamarin (Saguinus bicolor bicolor). One group was studied for 11 months in an area of secondary forest in a suburb of Manaus, Amazonas, Brazil. Three main vegetation types occurred inside the group’s home range (12 ha): capoeira, older secondary forest and campinarana (white sand forest). The tamarins ate fruits (21 species), flowers (1 species), exudates (4 species), and arthropods (insects and spiders). They spent 14.3% of total activity time seeking and eating animal prey, and 9.9% feeding on plant material, mostly fruits. In general, fruits consumed were ripe, small and succulent. Trees used for feeding were low and had small crown diameters. Three plant species (Protium aracouchinni, Myrcia cf. fallax, and Couma utilis) were used intensively during the three seasons covered by the study period. The concentrated use of 3 fruit species, each for an extended period (one fruiting species per season), provided the tamarins with a regular food supply. Tamarins consumed exudates from holes in the bark of trees of the families Anacardiaceae and Vochysiaceae, as well as gum exuded from seed pods of Mimosaceae. Exudates were exploited during the dry season and at the beginning of the wet season. Group travel was primarily based on routes connecting the fruiting trees exploited, with foraging for animal prey occurring during travel. Tamarins searched for arthropods on trunks, branches and leaves and in trunk holes. The foraging and feeding tactics displayed by S. b. bicolor are closely linked to morphological characteristics (small size and weight, claw-like nails) that allowed access to energy-rich resources (arthropods and plant exudates) in different strata of the vegetatio

ISSN:0015-5713    

DOI:10.1159/000156644

出版商:S. Karger AG    

年代:1992

数据来源: Karger

摘要:

The immediate effects of female partner preference on male mating behaviors and its potential influence on male reproductive success and conception in the Japanese macaque (Macaca fuscata) were analyzed. Although male dominance interactions probably led to low-ranking males having more single-day consortships and high-ranking males more multi-day consortships, dominant males were unable to prevent females from mating with preferred subordinate males. Ultimately, there was no marked difference in the number of estimated offspring sired. Females chose not to mate with certain males and actively mated with others, suggesting that female partner preferences do affect conception. Evidence for this was found in paternity estimates, which reflected observed preferences for particular middle-ranking young adult males.

ISSN:0015-5713    

DOI:10.1159/000156645

出版商:S. Karger AG    

年代:1992

数据来源: Karger

摘要:

Long-tailed macaques (Macaca fascicularis Raffles, 1821) were captured at various locations in the north of Sumatra as part of a study on social behaviour and genetic relationships. We used individual cage traps, a group trap, a blowpipe and an air-pressure rifle. Provided that the monkeys were willing to take bait, individual cage traps proved most successful; they gave a high capture rate with minimal disturbance of the group. Success with young juveniles and peripheral animals could be improved by placing elevated traps in the centre and in clusters at the periphery of the trapping site. Trapping had no clear lasting effect on the natural behaviour of the animals.

ISSN:0015-5713    

DOI:10.1159/000156646

出版商:S. Karger AG    

年代:1992

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156647

出版商:S. Karger AG    

年代:1992

数据来源: Karger

ISSN:0015-5713    

DOI:10.1159/000156648

出版商:S. Karger AG    

年代:1992

数据来源: Karger