"Fancy talk?" "All you need to know?"
I think that you are quite smart enough to understand the difference between "diapause" and cold period, Zoe!
You were right in saying that Stagmomantis carolina doesn't go into diapause -- but a cold period and diapause, at leat in mantid ooths, are not the same thing at all.
Chilling an ooth at above freezing (freeze it and you'll probably kill it), causes quiescence, a passive process in which embryogenesis (thats's the real word!) is slowed down. Doing this somewhat simulates a mild winter ouitside. Some people, including Rick, who has a lot of experience with this technique, claim that the longer incubation time produces better hatches and sturdier fry in species like S. carolina. I have no reason to doubt them.
Diapause in mantids is a dynamic (stuff is going on!) process and overwintering strategy which delays hatching until after there has been a substantial cold period, which ends or breaks the process and the weather has started to warm. The nymphs then emerge into a warm environment with plenty of food.
There are a lot of really cool things about this process. One is that it works in different ways for different insects. In some moth chrysalids, diapause is induced by the cold and broken by the lengthening photoperiod in thew spring. In the grasshoppers by me, the nymphs go into diapause when the grass dries out and there is no nutrition in it. Their growth slows way down until the monsoon comes.
Another is that simple carbohadrates (glucose) in each baby mantis egg, are converted into substances including sorbitol, which acts as antifreeze and stops the fluid in the egg from crystalizing at temps below freezing! Is that cool or what?
I hope that that helps. And yes, I thought that yr Christmas elf look was very cute. Remember that girl elf in that movie, "The Santa Claus"?
Rick. I don't think that you have ever been a true believer in diapause, even after Christian's explanation. Don't make me come up there with a stick. I shall just get injured and you will feel guilty about hurting a poor, crazed old man. :lol: