Daily rhythm and activation mechanism of the oviposition behavior in the cricket.

采用新研制的产卵图系统对蟋蟀的产卵行为进行了记录和分析，该系统通过专用的光电传感器对产卵器的穿透进行计数。同时记录和分析运动活动。实验条件为：27苯甲酸丙酯，12L: 12D。在正常的处女雌性中，第一次穿透出现在成年生活的第4天，而第一次产卵是在第17天。30 d的总产卵活动很低。在第3-5天，他们的运动活动非常高，然后下降并保持不变。作为日常活动，d期运动高，在d期开始后3 h达到高峰；另一方面，产卵没有明显的节律性。在成虫生活的第一天交配的雌虫，第一次穿透发生在第4天，第一个蛋也在第4天产下。8 d前，活性计数和产蛋数均呈上升趋势，随后逐渐下降。产卵主要发生在d期。它们的运动活动远低于处女，并且从第1天到第30天保持不变。运动的节奏很模糊。在去卵巢的雌性中，交配组和处女组的产卵和运动活动特征与正常雌性相似。这些结果表明，交配激活了产卵行为，但抑制了运动活动，而卵巢与这些变化无关。

Oviposition behavior in the cricket was recorded and analyzed by the newly developed actogram system, in which penetration of the ovipositor was counted through the special photo-sensor. Locomotion activity was simultaneously recorded and analyzled. Experimental condition was 27ﾟC and 12L : 12D.In normal virgin females, the first penetration appeared at the day 4 of the adult life, whereas the first egg was laid at the day 17. Total oviposition activity through 30 days was very low. Their locomotion activity was very high at the day 3-5, then it decreased and became constant. As the daily activity, the locomotion was high in D-phase, with the peak at 3 hrs after the beginning of the D-phase ; on the other hand, oviposition showed no distinct diel rhythmicity.In the females mated on the day 1 of the adult life, the first penetration occurred at the day 4, at which the first egg was also laid. The activity counted and eggs laid increased until the day 8 then decreased gradually. The oviposition occurred predominantly in D-phase. Their locomotion activity was much lower than that of virgins and kept constant from the day 1 through 30 days. The diel rhythm of the locomotion was obscure.In the ovariectomized females, characteristics of the oviposition and locomotion activity in mated and virgin groups were similar to those in normal females.These results revealed that the mating activates the oviposition behavior but suppresses the locomotion activity, and that the ovaries do not concern these changes.