Yano Y, Shiraishi S, Uchida T A
Zoological Laboratory, Faculty of Agriculture, Kyushu University, Fukuoka, Japan.
Exp Appl Acarol. 1987 Mar;3(1):73-8. doi: 10.1007/BF01200415.
As a part of ecological studies on Haemaphysalis longicornis, the effects of controlled temperatures (12, 15, 20, 25 and 30 degrees C; approximately 100% RH) on development and growth of the tick were investigated and the critical low temperature for each stage in the life cycle was estimated. As the temperature became low, the periods of preoviposition, oviposition, egg hatching (incubation) and moulting were prolonged. At 12 degrees C, however, oviposition, egg hatching and moulting of the larva and nymph did not occur. The critical low temperatures for oviposition, egg hatching (developmental zero) and larval and nymphal moulting, which were calculated theoretically from the regression equations, were 11.1, 12.2, 10.2 and 11.8 degrees C, respectively. The temperature also affected the egg productivity and hatch-ratio. The number of deposited eggs per mg of body weight decreased markedly at 15 degrees C, and the hatch-ratio was lowered with dropped temperatures.
作为长角血蜱生态学研究的一部分，研究了控制温度（12、15、20、25和30摄氏度；相对湿度约100%）对蜱发育和生长的影响，并估算了生命周期各阶段的临界低温。随着温度降低，产卵前期、产卵期、卵孵化（孵化）和蜕皮期延长。然而，在12摄氏度时，幼虫和若虫的产卵、卵孵化和蜕皮均未发生。根据回归方程理论计算得出的产卵、卵孵化（发育起点温度）以及幼虫和若虫蜕皮的临界低温分别为11.1、12.2、10.2和11.8摄氏度。温度还影响产卵量和孵化率。在15摄氏度时，每毫克体重的产卵数显著减少，且孵化率随温度降低而降低。
