The feeding pattern of the fruit bat Rousettus aegyptiacus in captivity.

J van der Westhuyzen
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Abstract

An electrical apparatus was designed to record continuously the feeding activity of either a colony of 30 fruit bats (Rousettus aegyptiacus) or single bats in captivity. The endogenous feeding activity rhythm was synchronized by change in the external light-dark cycle. During June to August (winter), the bats consumed an average of 96 g sliced banana, equal to 76 g wet weight/100 g body weight per 24 hours or 15 g dry weight/100 g body weight per 24 hours. The feeding period began shortly after sunset and continued for 10,6 h. Feeding consisted of 6-14 separate small meals. The mean or overall feeding rate was 9,1 g banana/h, and the feeding rate during the first 3 h, 13,1 g/h. The bat regulated its food intake by varying the rate of food consumption and not by changing the duration of the feeding period. It is suggested that clustering of the bats may influence the caloric intake by reducing the energetic cost of thermoregulation.

圈养埃及果蝠的摄食模式。
设计了一种电子设备,用于连续记录30只果蝠(Rousettus aegyptiacus)或单个圈养蝙蝠的摄食活动。内源摄食活动节律与外部光暗周期变化同步。在6月至8月(冬季)期间,蝙蝠平均消耗96克香蕉片,相当于每24小时76克湿重/100克体重或15克干重/100克体重。摄食期在日落后不久开始,持续10.6小时。摄食由6-14次小餐组成。平均或总摄食速度为9.1 g/h,前3 h摄食速度为13.1 g/h。蝙蝠通过改变食物的消耗速度来调节食物的摄入量,而不是通过改变进食时间的持续时间。这表明蝙蝠的聚集可能通过降低体温调节的能量消耗来影响热量摄入。
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