論文

査読有り
2016年9月

Activity patterns of the Ryukyu flying fox on a subtropical island: responses to seasonal changes in night length

JOURNAL OF ETHOLOGY
  • Atsushi Nakamoto
  • ,
  • Kazumitsu Kinjo
  • ,
  • Masako Izawa

34
3
開始ページ
321
終了ページ
328
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1007/s10164-016-0478-4
出版者・発行元
SPRINGER JAPAN KK

Almost all chiropteran species are nocturnal, but some species are occasionally active during the daytime. We conducted radio-tracking surveys and direct observations of the Ryukyu flying fox, Pteropus dasymallus, in two different habitats-urbanized and forested areas-on a subtropical island from April 2002 to January 2006. We recorded the departure time and return time from/to day roosts as well as behavioral time budgets during the night. The departure and return times shifted in correspondence with seasonal changes in sunset and sunrise times. The Ryukyu flying fox tended to depart earlier in summer when the night length was shorter, suggesting that it adjusts its active period by departing earlier. On the contrary, the amount of foraging performed by the bats in urbanized areas decreased in the summer when fruits of Ficus microcarpa were more abundant, suggesting that the bats adjust their behavioral time budgets in line with local food availability. Daytime activity was observed only in the forested area. In conclusion, the duration of Ryukyu flying fox activity was found to primarily depend on seasonal changes in the light-dark cycle, and this bat may adjust its behavioral time budget according to local food availability and the intensity of human activities.

Web of Science ® 被引用回数 : 1

リンク情報
DOI
https://doi.org/10.1007/s10164-016-0478-4
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000388838800014&DestApp=WOS_CPL