Effects of diet-deprivation and physical stimulation on the feeding behaviour of the larvae of the silkworm, Bombyx mori.
Effects of diet-deprivation and physical stimulation on the feeding behaviour of the larvae of the silkworm, Bombyx mori.
复制标题
DOI：
10.1016/j.jinsphys.2006.04.008
复制
发表时间：
2006-08
影响因子：
2.2
通讯作者：
S. Nagata;H. Nagasawa
中科院分区：
文献类型：
--
作者：
S. Nagata;H. Nagasawa
对家蚕幼虫的连续观察表明，在整个幼虫发育过程中，摄食是有规律的。为了研究影响摄食时间的可能因素，还分析了摄食剥夺的鱼幼虫的行为。饮食剥夺导致饮食替代后的第一餐持续时间较长，但不影响喂养模式。此外，长期的饮食剥夺促进流浪行为和饮食替代后喂养的延迟。在饮食剥夺条件下，进食开始似乎是由排便和物理刺激诱导的。然而，刺激诱导的进餐开始依赖于幼虫的前一餐所经过的时间。如果距上一次进食时间超过1小时，则可通过排便和拍打诱导幼虫进食。在餐后不到1小时，幼虫不太可能在排便或物理刺激后开始进食。激活运动，如游走和喂养观察到在长期的饮食剥夺的幼虫只有在饮食块被替换后，而长期的饮食剥夺的幼虫没有显示激活运动期间的饮食块的情况下。总的来说，这些数据表明，结合运动活动和饮食的存在可能是必要的饮食剥夺的幼虫开始喂养。
Continuous observations of larvae of the silkworm, Bombyx mori, revealed that feeding occurred at regular intervals throughout larval development. To investigate possible factors influencing meal-timing, the behaviours of diet-deprived Bombyx larvae were also analysed. Diet-deprivation resulted in longer durations of the first meals after diet replacement, but did not affect feeding patterns. Furthermore, long-term diet-deprivation promoted wandering behaviour and a consequent delay in feeding after diet replacement. Under diet-deprivation conditions, meal-starts appeared to be inducible by defecation and physical stimulation. However, stimulation-induced meal-starts were dependent on the time elapsed since the larvae's previous meals. Provided that more than 1h had elapsed since their previous meals, larvae could be induced to feed by defecation and tapping. At less than 1h post-meal, larvae were less likely to begin feeding after defecation or physical stimulation. Activated locomotions such as wandering and feeding were observed in the long-term diet-deprived larvae only after diet blocks were replaced, while long-term diet-deprived larvae did not show activated locomotion during the absence of diet blocks. Collectively, these data suggest that a combination of elevated locomotion activity and the presence of diet may be necessary for the initiation of feeding in diet-deprived larvae.