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Rick, But what species? Scott

Orin, Let me quote from page 309 of the Encyclopedia of Insects (Resh and Cardé, 2003). Which, by the way, is a well respected publication and was emphatically recommended to me by an Entomologist acquaintance of mine: "The best understood hormonal mechanism regulating embryonic diapause is...

Very nice.... Scott

Rick, What species oothecae did you keep in the dark? Scott

Any insect that enters diapause based on photoperiod cues taken as an embryo. Specific diapause information is hard to find. But here are a few examples I could find: Sarcophaga crassipalpis: this species experiences a diapause in the pupal stage that is induced by experiencing short...

PhilinYuma, I have some comments on your hypothesis: 1. The silkworm (Bombyx mori) diapause is a unique facultative/obligate blend and was referenced because the article cited discussed it in detail. Also, I thought the mechanism was intriguing, but not relevant to Stagmomantis limbata. 2...

Aiko, Blue Bottle flies would be a good choice. They are quite a bit larger than house flies. You can get them (pupae) from Rebecca at Mantis Place. You could also get some wax worms, let them pupate, and feed the moths than emerge. Grubco is a good choice for wax worms. I believe they have...

PhilinYuma, The quality of your experiment depends on the hypothesis you are testing and the variables that you are including in the test. The ideal test only has one variable. I don't know what hypothesis you are testing, but you have several variables. If you are testing the hypothesis that...

Light can penetrate more than 5mm into soil. Does the proteinaceous material oothecae are made of block light or allow light of the appropriate wavelength through? Other insects that go through a diapause have specialized extraretinal photoreceptors. Why not mantid embryos? Temperature is not...

PhilinYuma, I would not publish a scientific paper with the proof available from two different tests done with two different oothecae. That is why I said "Clearly these experiments would need to be repeated many times to verify the results." A little bit of "proof" is still proof. The simple...

PhilinYuma, Why do you assume the embryo in the ootheca would use the photoperiod of the day they were laid as a basis to calculate an environmental cue? The cue would undoubtedly be a critical day length as seen in Sarcophaga bullata. It may not be as sharp a demarcation though. The fact that...

PhilinYuma, This is ridiculous. Let's look at the first definition of "proof" in the American Heritage Dictionary: "The evidence or argument that compels the mind to accept an assertion as true." How about this first definition from Dictionary.com: "evidence sufficient to establish a thing...

Fisherman_Brazil, Is the Mantis religiosa species you have in Taiwan a native species or was it introduced? Scott

I found a reference supporting the idea that successful mating can trigger ootheca oviposition. In The Praying Mantids on page 315 in the chapter titled Rearing and Breeding Mantids, I found this text: "Since females often lay unfertilized eggcases, it is impossible to know until long after the...

No. That's not what I have been discussing anyway. Photoperiod length is the environmental cue, not the fact that there is a gradual decrease in photoperiod. The facultative pupal diapause of Sarcophaga bullata, the Flesh fly I mentioned in a earlier post in this thread, is an example of this...

PhilinYuma, I just read this again and am now quite confused. What do you mean by "consistent amount of light"? Here are my experiments: 1. Take a freshly laid Stagmomantis limbata ootheca and kept it at a temperature warm enough to incubate the eggs (75° F) AND gave it the right kind of...

kamakiri, Well, maybe we should define some terms here so we are clear: Obligate embryonic diapause: This form of diapause happens each generation and is not induced by environmental cues. The diapause is entered at some state in the development of the embryo. This could be at fertilization...

Katnapper, Stagmomantis limbata and Stagmomantis carolina look very similar. But, I very much doubt you have wild S. limbata in Illinois. Their range is the southwest United States. Scott

DARKSPEED, I don't have any experience trying to slow down the hatching of oothecae from tropical species so I can't tell if there are any side effects of using cooler temperatures to in an attempt to do so. Deserts and high deserts get cold at night in the winter months, with high deserts...

PhilinYuma, It will be interesting to see the results of your experiment. I look forward to hearing what happens with the Stagmomantis limbata ootheca that Arkanis has incubating inside as well. As I said, I have suspicions but no facts when it comes to my ideas regarding diapause in S...