Whitfield P J, Anderson R M, Bundy D A
Parasitology. 1977 Aug;75(1):9-30, passim. doi: 10.1017/s0031182000048307.
The activity patterns of the cercariae of Transversotrema patialense have been examined by monitoring the behaviour of individual larvae. Records of three different behavioural modes, namely active, tail-first swimming, passive dropping and resting periods were made separately. The age- and temperature-dependence of the activity patterns during the spontaneously active life of the cercariae were examined and estimates made of the absolute speeds of swimming and dropping. Through the temperature range 25--32 degrees C, the spontaneously active life of cercariae declined from about 18 h to about 6 h. Within this interval, after an initial period of high activity rates, a gradual decline in activity followed. The decline was a result of a decreasing frequency of swimming events rather than any change in the durations of such events. The neural control and energetic significance of the cercarial activity patterns are discussed.
通过监测单个幼虫的行为，对偏侧横沟吸虫尾蚴的活动模式进行了研究。分别记录了三种不同的行为模式，即主动、尾先游泳、被动掉落和静止期。研究了尾蚴自发活动期活动模式的年龄和温度依赖性，并对游泳和掉落的绝对速度进行了估计。在25-32摄氏度的温度范围内，尾蚴的自发活动期从约18小时缩短至约6小时。在此期间，在最初的高活动率期之后，活动逐渐下降。这种下降是游泳事件频率降低的结果，而不是此类事件持续时间的任何变化。讨论了尾蚴活动模式的神经控制和能量意义。
