Abstract
Double-choice experiments with three adult males of the little golden-mantled flying fox, Pteropus pumilus, and ten adult greater musky fruit bats, Ptenochirus jagori (both Megachiroptera: Pteropodidae), demonstrate that they are able to discriminate accurately between an empty dish and a dish containing fruits of one of several species by odour alone. Tests were run using fruits of six fruit species for Pteropus pumilus and five fruit species for Ptenochirus jagori. The fruit species used are known to be consumed in the wild by Ptenochirus jagori and are, with two exceptions, species of the natural rain-forest habitat. This is the first study to show that fruit bats are also able to assess the ripeness of a fruit exclusively by its odour. The bats preferred ripe over unripe fruits of the same species. Thus, both Pteropus pumilus and Ptenochirus jagori can not only locate fruits by their odour but can also discriminate between ripe and unripe fruits of the same species by olfaction. The results confirm and expand earlier findings on the role of olfactory cues in the orientation of foraging pteropodids.
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Acknowledgements
This paper is publication no. 20 of the Philippine Endemic Species Project (PESCP). The work of the PESCP is formalised under the aegis of a Memorandum of Agreement with the Department of Environment and Natural Resources (Quezon City, Philippines), and the help of the Protected Area and Wildlife Bureau (Director W.S. Pollisco) is gratefully acknowledged. Both in the field and at the station, we enjoyed the unstinting help of Henry Urbina and Felimon Geronimo. The project is funded by the Frankfurt Zoological Society. Further support was rendered by the German Ornithologists' Society, the European Union, the Andreas Stihl Foundation, the Ministry of Science and Research of North Rhine Westfalia, Daimler–Chrysler, the Vitakraft-Werke, and by the generous donations of Prof. Dr. mult. h.c. Ernst Mayr, Museum of Comparative Zoology, Cambridge, Mass., USA, and Mr. C. Sudhoff, Manila. The experiments performed comply with Philippine laws. The work of S. Luft is supported by a grant of the German Research Society (DFG), file number Cu 4/37-2.
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This research was undertaken under the auspices of the Philippine Endemic Species Conservation Project of the Frankfurt Zoological Society
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Luft, S., Curio, E. & Tacud, B. The use of olfaction in the foraging behaviour of the golden-mantled flying fox, Pteropus pumilus, and the greater musky fruit bat, Ptenochirus jagori (Megachiroptera: Pteropodidae). Naturwissenschaften 90, 84–87 (2003). https://doi.org/10.1007/s00114-002-0393-0
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DOI: https://doi.org/10.1007/s00114-002-0393-0