. Bonner zoologische Monographien. Zoology. 257 interviewed local administrators and people in villages using a questionnaire to gather information about baboon (Papio sp.) and Grivet (Cercopithecus a. aethiops) sleeping sites, predator and wildlife presence. The people are normally very well informed about baboons and grivets in their neighbourhood, because in most areas baboons and monkeys are recognized as a threat to crops and gardens. We visited the sleeping sites of the baboons and monkeys to the nearest possible point and recorded their position and altitude by GPS. Whenever possible we


. Bonner zoologische Monographien. Zoology. 257 interviewed local administrators and people in villages using a questionnaire to gather information about baboon (Papio sp.) and Grivet (Cercopithecus a. aethiops) sleeping sites, predator and wildlife presence. The people are normally very well informed about baboons and grivets in their neighbourhood, because in most areas baboons and monkeys are recognized as a threat to crops and gardens. We visited the sleeping sites of the baboons and monkeys to the nearest possible point and recorded their position and altitude by GPS. Whenever possible we tried to estimate the number of primates using the sleeping site and we took notes on the surrounding vegetation for a subsequent food analysis, and the nearest watercourse. Additionally, we recorded all other sites where we found evidence of primates. Primate habitats in Eritrea In our ecological description of primate habitats in Eritrea, we used the following parameters. - Precipitation: data on annual precipitation (mm y"1) derive from the National Map of Eritrea 1:1,000,000 and from meteorological stations of the Ministry of Agriculture. - Altitude: the altitude and position of sleeping sites and other points of interest was directly determined by GPS. Average altitude of home-ranges and maximum elevational difference in home-ranges were calculated from an elevation model of Eritrea (pixel size: x km) to the nearest 100 m ( Geological survey 1997).. : Distribution of Hamadryas and Olive baboons {Papio hamadryas, Papio anubis) in central Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bonn, Zoologisches Forschungsinstitut und Museum Alexander Koenig


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