Primate Research
Online ISSN : 1880-2117
Print ISSN : 0912-4047
ISSN-L : 0912-4047
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Volume 9, Issue 3
Displaying 1-4 of 4 articles from this issue
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  • Provisioned Monkeys among Wild Population of Japanese Macaques in Yakushima Island
    Hideki SUGIURA, Naoki AGETSUMA, Toshiaki TANAKA
    1993 Volume 9 Issue 3 Pages 225-233
    Published: 1993
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.2354/psj.9.3_225
    JOURNAL FREE ACCESS
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    Wild Japanese macaques (Macaca fuscasta yakui) around the Seiburindo Road in the western area of Yakushima Island have been occasionally provisioned by tourists. We censused the provisioned monkeys along the Seiburindo Road (19.2km) in this area.
    “Orange tests” were conducted for 236 individuals in 86 observation sessions to discriminate provisioned monkeys. Adult male monkeys were more provisioned than adult females or immatures.
    The median time for which they stayed around the road was 26 minutes in 30 minutes observation sessions. They mainly spent time on resting and foraging around the road.
    The areas where provisioned monkeys were observed had significantly larger artificial slopes than those where non-provisioned monkeys were observed. In addition, the number of groups that we found along the road were positively correlated with the height of the slopes. The amount of time for which we observed monkeys along the road also showed significantly positive correlation with the lengths of the slopes.
    These results suggested that, in the area where the artificial slopes were larger, monkeys tended to stay there for longer time and passengers could find monkeys more easily because of high visibility. Therefore, monkeys ranging larger artificial slopes might be more likely to contact with passengers and tend to be provisioned.
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  • Cheek Pouches and Primate Evolution
    Tamaki MARUHASHI
    1993 Volume 9 Issue 3 Pages 235-244
    Published: 1993
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.2354/psj.9.3_235
    JOURNAL FREE ACCESS
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    Primates occupy most of the all biomass of the seed dispersors in tropical forests. Among primates, two main feeding techniques are found; one is a type of processing the fruits with cheek pouches and another is a type of swallowing the fruits without cheek pouches. The cheek pouches are one of the main morphological features of Old World monkeys, however, neither the apes nor New World monkeys have cheek pouches.
    Almost all of Old World monkey species have matrilineal societies, while almost of the primate not having cheek pouches have non-matrilineal societies. Some of apes and atelines have patrilineal societies.
    Since the appearance of Cercopithecoid having cheek pouches in early Miocene, the relative species diversity of the hominoids in the primate community has been decreasing. This dramatic change of primate community in the Old World might be due to the differences in the efficiency of exploitation for the food resources in the forests between primates having and not having cheek pouches.
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  • [title in Japanese]
    [in Japanese]
    1993 Volume 9 Issue 3 Pages 245-249
    Published: 1993
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.2354/psj.9.3_245
    JOURNAL FREE ACCESS
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  • Proceedings of the 9th Anual Meeting of PSJ
    1993 Volume 9 Issue 3 Pages 251-310
    Published: 1993
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.2354/psj.9.3_251
    JOURNAL FREE ACCESS
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