. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 250 E. Kulzer Bonn, zool. Beitr. (Rousettus) in Java were found inseminated or in Puerperium from May to July (Kohlbrügge 1913, cited from Eisentraut 1944). Rousettus with half grown young was also observed in Kamerun by Eisentraut (1944) and on the islands near Timor with young in February and March. Baker and Baker (1936) found that Rousettus at Gizeh (Egypt) has no breeding season: here birth takes place in all months except February, August and December. In cont
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 250 E. Kulzer Bonn, zool. Beitr. (Rousettus) in Java were found inseminated or in Puerperium from May to July (Kohlbrügge 1913, cited from Eisentraut 1944). Rousettus with half grown young was also observed in Kamerun by Eisentraut (1944) and on the islands near Timor with young in February and March. Baker and Baker (1936) found that Rousettus at Gizeh (Egypt) has no breeding season: here birth takes place in all months except February, August and December. In contrast, Coe (1975) in Liberia and Jacobsen and Du Plessis (1976) in South Africa reported distinct seasonal breeding. Mutere (1968) studied the breeding ecology oí Rousettus aegyptiacus in Uganda near Lake Victoria (0°22' S). Within two years 733 bats were caught; the testes of male animals were weighed and dissected, and the females were dissected, too, to deter- mine whether they were pregnant. Fig. 11 shows the bimodal breeding pattern of these bats. Embryos were found with the same frequency in either horn of the bicornuate uterus from December until March when they were born. A break of two months was follo- wed by the June pregnancies. The second period of birth took place in September. The rate of pregnancy at each peak was about 80°/o, suggesting that each female breeds twice a year. From the weight of the testes and from histological studies the two peaks were also found in the Fig. 13: Twins, one to each teat (Kulzer 1969).. 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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