Abstract

The temporal activity patterns of individually housed captive southern brown bandicoots (Isoodon obesulus) were recorded using time-lapse infra-red videorecording. Recordings were made over a period of four continuous days per animal under natural lighting and climatic conditions for Perth, Western Australia during March 2002. Analysis showed that all bandicoots were almost entirely nocturnal and spent ~71% (~17 hr day-1) of their time in their nests. The times of onset of activity were remarkably regular, and occurred both following feeding during the late afternoon and again after dusk (average 1841 hrs). Bandicoots were active for an average of ~7 hr night-1. Virtually all activity involved the bandicoots running around their enclosures (~6.5 hr day-1). This running was interspersed with shorter periods spent feeding (~25 min day-1), grooming (~8 min day-1) and drinking (~2 min day-1). No other behaviours were observed. There was a greater degree of variation in the time of cessation of activity between individuals. Time of cessation ranged from 0039 hrs ± 20 min to 0504 hrs ± 25 min. The average time of cessation of activity was 0315 hrs ± 61 min and was not related to either time of onset of activity or sunrise.

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