Belozerov V N
Biological Research Institute of St Petersburg University, Old Peterhof, Russia.
Exp Appl Acarol. 1995 Sep;19(9):523-8. doi: 10.1007/BF00052921.
Egg batches laid by females of Ixodes persulcatus (maintained under a photoperiod of L:D 20:4 before feeding) contained eggs of two sizes: numerous normal eggs of 0.578 x 0.421 mm and some giant eggs of 0.776 x 0.515 mm. Giant eggs were 32-34% greater in length and 22-24% greater in width than normal eggs. Females maintained under a short-day photoperiod (L:D 12:12) laid only normal eggs (0.588 x 0.417 mm). There were no differences between these eggs in viability and developmental time, but larvae hatched from giant eggs were larger (length of body 23-28% greater and of gnathosoma 12-15% greater) than larvae from normal eggs. This dimorphism of eggs and larvae was not sex determined, but may be a maternal photoperiodic effect.
全沟硬蜱雌蜱（在喂食前保持20:4的光周期）产下的卵块包含两种大小的卵：大量大小为0.578×0.421毫米的正常卵和一些大小为0.776×0.515毫米的巨型卵。巨型卵的长度比正常卵长32 - 34%，宽度比正常卵宽22 - 24%。在短日照光周期（12:12）下饲养的雌蜱只产下正常卵（0.588×0.417毫米）。这些卵在活力和发育时间上没有差异，但从巨型卵孵化出的幼虫比从正常卵孵化出的幼虫更大（体长长出23 - 28%，颚体长出12 - 15%）。卵和幼虫的这种二态性不是由性别决定的，可能是母体光周期效应。
