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Chimpanzees (Pan troglodytes) often groom in gatherings that cannot simply be divided into unilateral dyadic grooming interactions. This feature of grooming is studied at two different levels: grooming cliques and grooming clusters. Grooming cliques are defined as directly connected configurations of grooming interactions at any given moment, and when any(More)
Observations of chimpanzees (Pan troglodytes) and bonobos (Pan paniscus) provide valuable comparative data for understanding the significance of conspecific killing. Two kinds of hypothesis have been proposed. Lethal violence is sometimes concluded to be the result of adaptive strategies, such that killers ultimately gain fitness benefits by increasing(More)
The temperature dependence of the rat taste response to NaCl was examined by measuring the chorda tympani activities in response to NaCl solution of varying temperatures before and after amiloride treatment. The response to NaCl was composed of 3 components: component I which was not suppressed by amiloride and components II and III which were suppressed by(More)
The temperature dependence of the canine and rat chorda tympani nerve responses to various taste stimuli was examined. The temperature dependence greatly varied with species of stimuli. In the dog, the tonic responses to fructose, sucrose, acetic acid, and guanosine 5'-monophosphate (GMP) and the response induced by the synergism between monosodium(More)
Here we consider the concept of kaluchua (a word adopted from the English "culture") in group-living animals developed by Imanishi in the 1950s. He distinguished it from bunka (the Japanese equivalent to the English "culture") because he thought that bunka had strong connotations of noble and intellectual human-like activities. Although he did not rigidly(More)
Use of leaves or sticks for drinking water has only rarely been observed during long-term study of wild chimpanzees (Pan troglodytes schweinfurthii) at Mahale. Recently, however, we observed 42 episodes of tool-use for drinking water (73 tools and two cases of using "tool-sets") between 1999 and 2004. Interestingly, all of the performers were immature(More)
The purpose of this study is to compare the efficacy of a single administration of dexamethasone (DEX) on day 1 against DEX administration on days 1-3 in combination with palonosetron (PALO), a second-generation 5-HT3 receptor antagonist, for chemotherapy-induced nausea and vomiting (CINV) in non-anthracycline and cyclophosphamide (AC) moderately-emetogenic(More)
Toshisada Nishida, a pioneer in the study of primate behavior, died on June 7, 2011 following a prolonged battle with cancer. He was 70 years old. Nishida began his career while still an undergraduate student at Kyoto University, where he was inspired by Kinji Imanishi. In 1962, he investigated interactions between two groups of Formosan macaques that had(More)
  • Masakazu Kurisu †a, Muneo Fukaishi, Hiroshi Asazawa, Masato Nishikawa, Kazuyuki Nonmembers, Michio Nakamura +1 other
  • 1999
SUMMARY In this paper, we briefly review the recent research on CMOS gigahertz-rate communication circuits. Then, we describe design innovations we have made to overcome limitations on communication speed. Using 0.25-µm CMOS technology , we developed a 4.25-Gb/s Fibre Channel transceiver that features an asynchronous tree-type 1 : 8 demultiplexer and an(More)
We report the physical and behavioral development of one severely disabled female infant chimpanzee (Pan troglodytes schweinfurthii) of the well-habituated M group in the Mahale Mountains National Park. We documented interactions between the infant and its mother and with other group members. Congenital disabilities occur in many primate species, including(More)