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Vol. 36, No. 2 April 1995
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| Nishihara, Tomoaki: Feeding Ecology of Western Loeland Gorillas in the Nouabale-Ndoki National Park, Congo..........151
Key Words: Ndoki, Western lowland gorilla, Feeding behavior, Fruits, Swamp. |
| Takahata, Yukio; Koyama, Naoki; Suzuki, Shigeru: Do the Old Aged Females Experience a Long Post-reproductive Life Span?: The Ceses of Japanese Macaques and Chimpanzees..........169
Key Words: Post-reproductive life span, Aging, Japanese macaque, Chimpanzee, Menopause. |
| Tutin, Caroline E. G.; Ham, Rebecca; Wrogemann, Dorothea: Tool-use by Chimpanzees (Pan troglodytes ) in the Lope Reserve, Gabon..........181
Key Words: Chimpanzee, Tool-use, Insect-eating, Cultural variation, Technology. |
| Sugiyama, Yukimaru: Tool-use for Catching Ants by Chimpanzees at Bossou and Monts Nimba, West Africa..........193
Key Words: Tool-using behavior, Ant-catching wand, Zingiberales, Culture, Dorylus (Dorylus ) molestus. |
| Nishida, Toshisada; Hosaka, Kazuhiko; Nakamura, Miho; Hamai, Miya: A Within-group Gang Attack on a Young Adult Male Chimpanzee: Ostracism of an Ill-mannered Menber?..........207
Key Words: Chimpanzee, Mahale Mountains, Gang attack, Pant-grunt, Ostracism. |
| Markus, Nicola; Croft, David B.: Play Behaviour and Its Effects on Social Development of Common Chimpanzees (Pan trodlodytes )..........213
Key Words: Chimpanzee, Play behaviour, Social development, Individual differences, Captivity. |
| Lefebvre, Louis: Culturally-trnsmitted Feeding Behaviour in Primates: Evidence for Accelerating Learning Rates..........227
Key Words: Cultural transmission, Social learning, Learning curve, Logistic. |
| McGrew, William C.; Webster, Joanne: Birth Seasonality in Cotton-top Tamarins (Saginus oedipus ) Despite Constant Food Supply and Body Weight..........241
Key Words: Cotton-top tamarin, Callitrichidae, Birth, Seasonality, Body-weight. |
| Moro, Makoto; Torii, Ryuzo; Koizumi, Hitoshi; Inada, Yoichi; Etoh, Yasuo; Miyata, Hiroshi; Tanioka, Yoshikuni: Serum Levels of Prolactin During the Ovarian Cycle, Pregnancy, and Lactation in the Common Marmoset (Callithrix jacchus )..........249
Key Words: Common marmoset, Prolactin, Ovarian cycle, Pregnancy, Lactation. |
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Short Communications
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| Heymann, Eckhard W.: Urine Washing and Related Behaviour in Wild Moustached Tamarins, Saginus sytax (Callitrichidae)..........259
Key Words: Red-handed tamarin, Urine washing, Urinating onto hand, Thermoregulation, Communication. |
| Brent, Linda; Bloomsmith, Mollie A.; Fisher, Stanley D.: Factors Determining Tool-using Ability in Two Captive Chimpanzee (Pan troglodytes ) Colonies..........265
Key Words: Tool-use, Chimpanzee, Rearing, Experience, Reaching tool. |
| Mason, Angela M.; Wolfe, Linda D.; Johnson, Jeffery C.: Hand Preference in the Sifaka (Propithecus verreauxi coquereli ) During Feeding in Captivity..........275
Key Words: Coquerel's sifaka, Handedness. |
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Researach Reports
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| Puertas, Pablo E.; Aquino, Rolando; Encarnación, Filomeno: Sharing of Sleeping Sites Between Aotus vociferans with Other Manmmals in the Peruvian Amazon..........281 Key Words: Owl monkey, Cohabitation, Cooccupation, Sleeping sites. |
| Ferrari, Stephen F.: Observation on Chiropotes albinasus from the Rio dos Marmelos, Amasonas, Brazil..........289 Key Words: Bearded saki, Body size, Diet, Gut morphology, Geophagy. |
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Book Reviews..........295
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