Abstract: We studied the olfactory sensitivity of the short-nosed fruit bat Cynopterus sphinx (Megachiroptera:Pteropodidae),
by selecting six adult individuals and testing their response to differing concentrations of banana juice and controls.
Experiments were conducted indoors on 5 continuous nights. We used banana juice at different concentrations (diluted with water)as the baits (100%, 50%, 25% and 12. 5% ), and used overripe banana juice (OR)and water (W)as controls. Standardized volumes (120 g)of each of the four concentrations of banana juice and two control selections (OR and W) were randomly placed in containers and bats were allowed free access to all for a period of 11. 5 night-time hours. Frequency of visits,amount consumed,and visiting duration were all highest for 100% banana juice. Short-nosed fruit bats appear able to distinguish different concentrations of fruit. We hypothesize that they prefer to select ripe fruits in the field.

Key words: Banana juice, Foraging behaviour, Olfaction, Short-nosed fruit bat(Cynopterus sphinx)

摘要： 为了解犬蝠的嗅觉灵敏度,我们以6 只成年犬蝠对不同浓度的成熟香蕉汁和纯水对照的选择倾向和取食时间各进行了连续5 个夜晚的室内观察。香蕉汁的浓度分别为100% (120 g),50% (60 g 香蕉汁和60 g 纯水),25% (30 g 香蕉汁和90 g 纯水),12. 5% (15 g 香蕉汁和105 g 纯水);另取纯水(W)与熟烂的香蕉汁(OR)各120 g 作为对照。将以上食物和对照随机注入不同的容器内,观察犬蝠对不同浓度的香蕉汁、熟烂香蕉汁和纯水的选择。结果表明,犬蝠对纯成熟香蕉汁的选择性最强,取食次数和取食量均最高,而停留时间也最长;说明犬蝠具有分辨不同浓度的气味差异。我们推测犬蝠在野外觅食时可能优先取食成熟水果。

关键词: 嗅觉, 香蕉汁, 觅食行为, 犬蝠