Temporal pattern of exploratory behavior during 24-hour sessions in a Japanese monkey (Macaca fuscata) troop

Jun'ichi Yamamoto, Yoshiharu Higuchi, Toshio Asano

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1 Citation (Scopus)


The temporal pattern of exploratory behavior of a troop of Japanese monkeys to a novel apparatus introduced into their habitat was examined during four successive 24-hour periods. An "exploratory behavior" was defined as a press to a transilluminated panel within the apparatus. These presses had no scheduled consequences. The results showed that: (1) there was no responding from 1900 to 0600 hours; and (2) that day-time responding was bimodal, with activity peaking between 1000 and 1100, and 1600 and 1700 hours. These findings were discussed in terms of field studies and operant-based research which have studied diurnal processes in monkeys.

Original languageEnglish
Pages (from-to)217-223
Number of pages7
JournalBehavioural Processes
Issue number2
Publication statusPublished - 1987 Apr



  • 24-hour experiment
  • Japanese monkey troop
  • bar-press
  • diurnality
  • exploratory behavior

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Behavioral Neuroscience

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