MacDonald S
Parasitology. 1975 Oct;71(2):211-28. doi: 10.1017/s0031182000046667.
Eggs of three species of Diclidophora were incubated in alternating 12 h periods of light and darkness at 13 degrees C. Eggs of D. merlangi collected at Arbroath hatched during the illumination period with most larvae being recovered in the first 4-6 h; some evidence of a seasonal difference in hatching of these eggs was found. Eggs of D. merlangi collected at Plymouth hatched with a peak of larval recovery in the 2 h period before the light came on. Eggs of D. luscae hatched over 'dusk' while those of D. denticulata hatched after the light was switched off. Neither mechanical disturbance nor the proximity of host tissue caused hatching in D. merlangi or D. luscae. Observations on the behaviour of the host fishes suggest that the hatching rhythms are adapted to specific host behaviour patterns.
将三种双盘吸虫的虫卵置于13摄氏度、12小时光照与12小时黑暗交替的环境中进行孵化。在阿伯丁采集的梅氏双盘吸虫的虫卵在光照期孵化，大部分幼虫在前4至6小时孵出；发现这些虫卵的孵化存在一定的季节差异。在普利茅斯采集的梅氏双盘吸虫的虫卵在光照来临前2小时出现幼虫孵出高峰。卢氏双盘吸虫的虫卵在“黄昏”时孵化，而具齿双盘吸虫的虫卵在灯光关闭后孵化。对于梅氏双盘吸虫和卢氏双盘吸虫，机械干扰或宿主组织的接近均不会导致虫卵孵化。对宿主鱼类行为的观察表明，孵化节律与特定的宿主行为模式相适应。
