I found some nymphs in the substrate. They are ca. 3 mm long and like to be under the coco husk. I am afraid some have dehydrated from the heat mat, because I did not expect babies now! I have only one adult female.
Can she give birth again in the future?
How hardy is the nymphs of this species?
And what is your experience of this species? (I think this is the most fun arthropod I have!)
I have a male and female that are breeding quite well. I see new nymphs about every 6-8 weeks, and they seem to double in size about every 2 weeks. That's a ballpark as I don't really keep track of the timing, but I saw my first tiny batch in December and she's had at least 3 births total. The first batch is now about 1.5" long - about the same size as B. discoidalis before their final molt.
I've found the nymphs to be very hardy. I haven't seen any dead ones yet (though they probably eat them before I can find them). I see about 10-12 nymphs with each birth. I know that lower temps and lower humidity can really slow their growth, and they grow quicker when living in colonies. Something about being jostled around stimulates their growth and development, like dubias.
I keep mine in a tall pretzel bin with vertical bark and deep moist substrate (with collembola) topped with sphagnum moss. The moss does a nice job of keeping the soil humidity balanced. I've been feeding mine mostly fruit with the occasional roach chow or piece of cooked chicken/cooked hamburger. They freak out over the hamburger, but I don't give it often. I keep some food on the ground and hang some from the lid on a wire. I think the adults like being able to eat while they're on their bark, and it draws out the little ones. I also have some small pieces of rotting oak wood for food. I spray the enclosure every other day at feeding time. Mine are kept at 78-85 F with about 35% humidity. Not sure that that's the ideal condition, but they are making babies faster than I thought they would!
The really interesting thing about their mating is the courting ritual. I haven't seen mine do it yet, but I saw it on a documentary on cave roaches. The males flip their wings up and emit an edible pheromone substance that draws the female. The female climbs up to ingest the substance, and while she's busy the male starts getting down to business. I've read a few journal articles that provide some evidence that males raised on high carb foods are larger, heathier and more appealing to females than those raised on high protein, as food affects the pheromone substance. The female only needs to mate once and she can give birth throughout her life.
Here's my set up (I will be switching them to a larger container as they grow, and removing extra males).