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Chapter
Column: Following Bonobos in the Forest
On my first trip abroad 30 years ago, I walked through the Wamba Forest and followed bonobos almost every day. I still vividly remember the hot air and smell of the forest, which was full of things I did not k...
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Article
The diet and feeding behavior of the black-and-white colobus (Colobus guereza) in the Kalinzu Forest, Uganda
One of the goals for primate feeding ecology is to understand the factors that affect inter- and intra-specific variations. Therefore, a detailed description of basic feeding ecology in as many populations as ...
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Chapter
Long-Term Studies on Wild Bonobos at Wamba, Luo Scientific Reserve, D. R. Congo: Towards the Understanding of Female Life History in a Male-Philopatric Species
Long-term studies on wild bonobos began at Wamba, in the current Luo Scientific Reserve, in 1973. Except for several interruptions due to political instability and civil war, we have been conducting studies of...
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Chapter
Longitudinal Structure of a Unit-group of Bonobos: Male Philopatry and Possible Fusion of Unit-groups
Bonobos and chimpanzees have a male-philopatric social structure (Nishida 1979, Itani 1985, Goodall 1986, Wrangham 1986, Pusey and Packer 1987, Kano 1992, Wallis 1997, Reynolds 2005, Furuichi 2006). Demographi...
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Chapter
Changes in the Status of Bonobos, their Habitat, and the Situation of Humans at Wamba in the Luo Scientific Reserve, Democratic Republic of Congo
Bonobos range over the area between the Congo-Lualaba River and the Kasai-Sankuru River in the Democratic Republic of the Congo (DRC; Kano 1984). Kano et al. (1996) stated that bonobos are more or less continu...
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Chapter
Seasonal Changes in Fruit Production and Party Size of Bonobos at Wamba
Because chimpanzees (Pan troglodytes) have a unique fission-fusion social structure, many researchers have investigated the nature of foraging parties. They have reported that chimpanzees form foraging parties wh...
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Chapter
Relationships among Fruit Abundance, Ranging Rate, and Party Size and Composition of Bonobos at Wamba
As close relatives, chimpanzees (Pan troglodytes) and bonobos (Pan paniscus) share some important characteristics in their social structure. Both species form male philopatric unit-groups, with males remain in th...
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Article
Frequent insectivory by two guenons (Cercopithecus lhoesti and Cercopithecus mitis) in the Kalinzu Forest, Uganda
I investigated the feeding ecology of l’Hoest’s monkeys (Cercopithecus lhoesti) and blue monkeys (Cercopithecus mitis) in the Kalinzu Forest, Uganda. Although forest guenons are generally thought to be frugivores...
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Article
What Factors Affect the Size of Chimpanzee Parties in the Kalinzu Forest, Uganda? Examination of Fruit Abundance and Number of Estrous Females
We examined factors affecting the size of chimpanzee parties in the Kalinzu Forest, Uganda. We found that the number of individuals in a party increased with observation time. Therefore, we employed two method...
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Article
Extended Application of a Marked-Nest Census Method to Examine Seasonal Changes in Habitat Use by Chimpanzees
The Kalinzu Forest Reserve in Uganda comprises various types of vegetation, including mixed mature forest, Parinari-dominated mature and secondary forest, and Musanga-dominated secondary forest. We used a marked-...
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Article
Fruit Availability and Habitat Use by Chimpanzees in the Kalinzu Forest, Uganda: Examination of Fallback Foods
We studied seasonal change in habitat use by chimpanzees in the Kalinzu Forest, Uganda. The forest comprises various types of vegetation. For each vegetation type, we compared number of chimpanzees (per km2) that...
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Article
Monitoring the reproductive status of Japanese monkeys (Macaca fuscata) by measurement of the steroid hormones in fecal samples
The menstrual cycles as well as the pregnancy in female Japanese monkeys (Macaca fuscata) were monitored by measuring the fecal estradiol concentrations and relative amounts of fecal progesterone. Steroids from f...
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Article
Ant dip** and meat eating by wild chimpanzees in the kalinzu forest, uganda
New evidence of ant dip** and meat eating by chimpanzees was recorded in the Kalinzu Forest, Uganda. We found stems and branches at the nests of driver ants,Dorylus molestus, just after chimpanzees had left the...
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Article
Habitat Use and Ranging of Wild Bonobos (Pan paniscus) at Wamba
The relationship between vegetation and ranging patterns of wild bonobos at Wamba, Democratic Republic of the Congo, was examined. Via Landsat data, we distinguished three types of vegetation—dry...
