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Periodicity of the behaviour of common marmosets Callithrix jacchus in semi-free conditions Periodizitat des Verhaltens von Weissbuschelaffen Callithrix jacchus unter Semifreiland-Bedingungen

Suchi, S.; Rothe, H.

Zoologische Garten. Januar; 701: 21-38

2000


Accession: 038534752

The influence of abiotic environmental factors on the time budget and periodicity of the behaviour of a group of common marmosets (Callithrix jacchus) was investigated under semi-free conditions. A group of eight members had a home-range consisting of a heated wooden hut with veranda and an adjacent cage, surrounded by an open area with a few trees (ca. 3,5 m high) and three runways made out of roofing slats, on which feeding places, sitting boards and sleeping boxes were fixed. The ainmals were fed twice daily. The food supply was held constant throughout the observation period with respect to amount, composition and spatial distribution. From July to November 1995, the behaviour and the location of the group members was recorded during the whole daily activity period using an instantaneous-sampling method. 265 hours of observation could be evaluated. An electronic weather station recorded the temperature, humidity, air pressure, wind speed, wind direction, precipitation, and light intensity at intervals of 5 min. The time budget of the focus-group was similar to that in the natural habitat. There were maxima of food comsumption and locomotion in the morning and in the evening as well as an extended period of resting and allogroomiug during the late morning. Intensive play and exploratory behaviour was observed in the afternoon. The distribution of the feeding behaviour of the focus-group differed from that of wild groups; this is eventually due to the specific experimental design used in the present investigation. Except for "preying on insects" the time budget of the group members was synchronized.

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