Sri Suci Utami

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Geographic variation in some aspects of chimpanzee behavior has been interpreted as evidence for culture. Here we document similar geographic variation in orangutan behaviors. Moreover, as expected under a cultural interpretation, we find a correlation between geographic distance and cultural difference, a correlation between the abundance of opportunities(More)
We investigated the effect of the number of faecal samples, ofextracts per sample and of PCRs per extract on the reliability ofgenotypes for a microsatellite locus in free-living orang-utans.For each individual 36 PCRs were performed using DNA extractionsfrom up to four faecal samples. We found a very largeinter-individual variation in positive PCRs (P+)(More)
We conducted a validation of the line transect technique to estimate densities of orangutan (Pongo pygmaeus) nests in a Bornean swamp forest, and compared these results with density estimates based on nest counts in plots and on female home ranges. First, we examined the accuracy of the line transect method. We found that the densities based on a pass in(More)
Sri Suci Utami,a,b Benoı̂t Goossens,c Michael W. Bruford,c Jan R. de Ruiter,d and Jan A.R.A.M. van Hooffa aEthologie & Socio-ecologie, Universiteit Utrecht, PO Box 80086, 3508 TB Utrecht, The Netherlands, bFakultas Biologi, Universitas Nasional, Jl. Sawo manila, Jakarta 12510, Indonesia, cBiodiversity and Ecological Processes Group, School of Biosciences,(More)
Orangutans have the longest immature period and inter-birth interval of all ape species. This may be explained by a slow life history, the need to develop skills or by their relatively solitary lifestyle, which prevents a mother from associating with two offspring. This study of wild immature orangutans at the Ketambe Research Station, Indonesia, describes,(More)
Chitosan, a natural biopolymer derived from chitin, is considered a promising scaffold material for bone tissue engineering. The ability of chitosan to promote the osteogenic differentiation of dental pulp stromal/stem cells (DPSCs) is unknown. We have evaluated the potential of chitosan to induce the osteogenic differentiation of macaque DPSCs in(More)
Orangutans are usually solitary. However, occasionally aggregations are formed, especially in large fruiting fig trees. Individuals in these aggregations may experience scramble or contest competition for food. We investigated the type and strength of food competition in large figs among wild Sumatran orangutans. Adult males foraged more efficiently than(More)
Indonesia has the third highest number of people living with HIV/AIDS (PLWH) and the greatest increase in proportion of AIDS-related mortality in the Asia Pacific region between 2005 and 2013. Longitudinal mortality data among PLWH in Indonesia are limited. We conducted a retrospective cohort study from medical records of antiretroviral treatment (ART)(More)
Research articles Genetic variation and population structure in desert bighorn sheep: implications for conservation Gustavo A. Gutiérrez-Espeleta, Steven T. Kalinowski, Walter M. Boyce & Philip W. Hedrick 3–15 Genetic distinction of pallid, shovelnose, and Alabama sturgeon: emerging species and the US Endangered Species Act Donald E. Campton, Anna L. Bass,(More)