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jbrd

Gromphadorhina portentosa

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I have some general questions on the colony of Gromphadorhina portentosa we have.

How old are they usually when they get prego?

How long is the gestatation period?

When the egg case is out and being aired is this a sign the nymphs will be born soon and about how long before birth?

Does anyone know where i could get information on a natural type set up for them?

How long do they live?

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I have some general questions on the colony of Gromphadorhina portentosa we have.

How old are they usually when they get prego?

How long is the gestatation period?

When the egg case is out and being aired is this a sign the nymphs will be born soon and about how long before birth?

Does anyone know where i could get information on a natural type set up for them?

How long do they live?

Hi: Female hissing roaches can mature at 5-6 months.

They can have baby's one month after reaching maturity.

The gestation period can be anywhere between 3 to 5 months.

When the female eggcase comes out, in a sense it can be used to say she will give birth shortly,

allthough it may be another month before the baby's are actually born.

Actually what she will do is when the eggcase comes out she will flip it over, turn it around,

and draw it back in.

She does this to make sure the eggcase is thoughly incubated evenly.

Hissing roaches are known to live up to ten years in captivity.

Ken

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Hi: Female hissing roaches can mature at 5-6 months.

They can have baby's one month after reaching maturity.

The gestation period can be anywhere between 3 to 5 months.

When the female eggcase comes out, in a sense it can be used to say she will give birth shortly,

allthough it may be another month before the baby's are actually born.

Actually what she will do is when the eggcase comes out she will flip it over, turn it around,

and draw it back in.

She does this to make sure the eggcase is thoughly incubated evenly.

Hissing roaches are known to live up to ten years in captivity.

Ken

Thanks for the information on the Gromphadorhina portentosa.

Very interesting on the flipping over of the egg case, i have not seen any of them do this yet :(

Now do both the male and female have the same life expectancy?

How long does it take the males to mature?

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Actually the males take less time to mature, than the females.

The males can mature in less time, given proper care, they may try to mate with females, regardless of if the female is mature.

Males don't live quite as long as females, given they are under more stress, involving male combat over dominance and territory.

Anytime!!

Ken

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Actually the males take less time to mature, than the females.

The males can mature in less time, given proper care, they may try to mate with females, regardless of if the female is mature.

Males don't live quite as long as females, given they are under more stress, involving male combat over dominance and territory.

Anytime!!

Ken

Thanks again, we watch our males battle for territory all the time :lol: It is especially interesting when the 3+ inch males are doing it lol

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Nearly all of the blaberids (Blaberus, Panchlora, Eublaberus, Hormetica, Nauphoeta, etc.) do the same thing with the eggcase. They form the eggcase upright like egg laying speices. However, as soon as it's done it is flipped it on it's side and then drawn back in for gestation. If it's sticking out upright for a while it's likely being formed but if it's sticking out sideways for any length of time it's being aborted.

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In the abdomen, along the top is the common oviduct, spermethecal glands and other glands. These all squeeze together to make the eggs/ootheca. Once this is formed, it is extruded in order to be retracted into a brood sac which is located below the ovaries/oviduct in the lower part of the abdomen. They can then form new eggs while the previous ones complete developement in the brood sac. Sometimes stress, poor diet, or dehydration can cause the roach to expell what is in the broodsac. Kind oflike an overhead compartment doing one thing and a lower compartment doing something else. Or in baking terms, blender on top mixing ingredients and oven on the bottom baking them off!

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Thanks for all the great info! VERY helpful.... B)

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