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Impacts of Intergroup Interactions on Intragroup Behavioral Changes in Javan Gibbons (Hylobates moloch)

Title
Impacts of Intergroup Interactions on Intragroup Behavioral Changes in Javan Gibbons (Hylobates moloch)
Authors
Yi, YoonjungFichtel, ClaudiaKim, ErickChoe, Jae C.
Ewha Authors
최재천
SCOPUS Author ID
최재천scopusscopus
Issue Date
2020
Journal Title
INTERNATIONAL JOURNAL OF PRIMATOLOGY
ISSN
0164-0291JCR Link

1573-8604JCR Link
Citation
INTERNATIONAL JOURNAL OF PRIMATOLOGY vol. 41, no. 2, pp. 363 - 381
Keywords
Activity budgetGroomingIntergroup avoidanceIntergroup encountersIntragroup affiliative behavior
Publisher
SPRINGER
Indexed
SCIE; SCOPUS WOS
Document Type
Article
Abstract
Agonistic intergroup interactions can cause individual costs such as physical injuries, increased physiological stress, and disrupted intragroup social relationships. Therefore, individuals should employ behavioral strategies to minimize the cost associated with aggressive intergroup encounters (IGEs). We investigated the behavioral strategies of territorial, pair-living Javan gibbons (Hylobates moloch) in response to intergroup aggression, including 1) changes in activity budgets, 2) affiliative behaviors within pairs, and 3) potential intergroup avoidance strategies, such as sleeping tree selection. We observed 129 encounters in three habituated gibbon groups surrounded by four unhabituated groups in Gunung Halimun-Salak National Park, Java, from 2014 to 2016. Overall, gibbons significantly altered their activity budgets during IGEs: they foraged less and were less active than when there was no encounter. We also found a decrease in grooming within pairs following IGEs compared to a matched-control period. However, we did not find any effects of the intensity of aggression, outcome, length of, or female participation in IGEs on grooming within pairs in the hour after an encounter. Male gibbons slept farther away from the IGE location after aggressive IGEs than after neutral encounters. Our results suggest that not only primates living in large groups but also primates living in small groups, such as Javan gibbons, may develop behavioral strategies to deal with direct (during encounters), immediate (within 1 h after encounters), and possibly longer (at the end of a day with encounters) effects of intergroup interactions.
DOI
10.1007/s10764-019-00116-8
Appears in Collections:
자연과학대학 > 생명과학전공 > Journal papers
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