. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Heft 3—4 30/1979 Ecology and Range of Rousettus 235. Fig. 1: (a) Approximate time of the first emergence of fruit bats from the Matlapitsi Cave (South Africa) in the course of the year (no observations in January and February), Redrawn from Jakobsen and Du Plessis 1976. (b) Pattern of emergence of the fruit bats from the cave on two separate occasions. Redrawn from Jakobsen and Du Plessis 1976. In order to study the locomotor activity of individual Rousettus, Erkert
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Heft 3—4 30/1979 Ecology and Range of Rousettus 235. Fig. 1: (a) Approximate time of the first emergence of fruit bats from the Matlapitsi Cave (South Africa) in the course of the year (no observations in January and February), Redrawn from Jakobsen and Du Plessis 1976. (b) Pattern of emergence of the fruit bats from the cave on two separate occasions. Redrawn from Jakobsen and Du Plessis 1976. In order to study the locomotor activity of individual Rousettus, Erkert (1970) used wooden climbing boxes for registration. The climbing rods were connected to micro-switches which were activated by the moving animal. The boxes were illuminated either artificially or by daylight. The light could be filtered from 1/10 to 1/10 000 by reduction filters. In all cases Rousettus showed a monophasic activity pattern. The main locomotor activity was measured within the second half of the dark period (Fig. 3). Under natural daylight conditions in July, the activity began about 20 minutes after sunset and finished abruptly about 15 minutes before sunrise ( lx). In September the activity be-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zoologisches Forschungsinstitut und Museum Alexander Koenig. Bonn : Das Forschungsinstitut
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