Radiated gender determination

[921]

Hi all,

As title, can you help me to determine the gender of the two radiated tortoise ?

Both of them are about 12～13 inches, thanks.

 

[CampLevi]

Hi all,

As title, can you help me to determine the gender of the two radiated tortoise ?

Both of them are about 12～13 inches, thanks.View attachment 340557View attachment 340558

Males will have much larger tails than females.
The plastron of a male ( the belly of the shell) will be rather concave.
The plastron of a female will be rather flat.

 

[921]

Males will have much larger tails than females.
The plastron of a male ( the belly of the shell) will be rather concave.
The plastron of a female will be rather flat.

Thanks for reply.
So do you think both of them are female ?

 

[CampLevi]

Well I can’t see how concave they are but by how big your saying they are and the scutes at the rear end They both look like males if you ask me.

 

[zovick]

Hi all,

As title, can you help me to determine the gender of the two radiated tortoise ?

Both of them are about 12～13 inches, thanks.View attachment 340557View attachment 340558

Top one looks probable female, but I cannot see the tail very well. Bottom one is harder to tell, but could be a male. Is the plastron at all concave on the either one?

 

[CampLevi]

Here’s a photo I picked up. The one on the right is female. Left is male

 

[921]

Top one looks probable female, but I cannot see the tail very well. Bottom one is harder to tell, but could be a male. Is the plastron at all concave on the either one?

Top one looks probable female, but I cannot see the tail very well. Bottom one is harder to tell, but could be a male. Is the plastron at all concave on the either one?

Thanks for reply.

I have three radiated, all of them are about 13 inches, the tail of the other one is very long and plastron is concave. I know it's a male.

But the other two, make me confused.

 

[zovick]

Thanks for reply.

I have three radiated, all of them are about 13 inches, the tail of the other one is very long and plastron is concave. I know it's a male.

But the other two, make me confused.
View attachment 340560View attachment 340561View attachment 340562View attachment 340563

Both #1 and #2 could be females, but it is still hard to be positive.

 

[dd33]

How old are they? How long have you had them?

 

[921]

How old are they? How long have you had them?

They are about fifteen years old, I got them from my friend only few months.

 

[921]

Both #1 and #2 could be females, but it is still hard to be positive.

Thanks for response.

In your experience, what kind of size and how old are them could be determine gender accurately ?

They are about 13 inches PL, 15 inches SCL and 15 years old now.

 

[zovick]

Thanks for response.

In your experience, what kind of size and how old are them could be determine gender accurately ?

They are about 13 inches PL, 15 inches SCL and 15 years old now.

Normally, I can sex my own Radiated Tortoises by 7 to 10 years of age and about 10" or so in length. Those two should be old enough and large enough now to tell the sexes, but with Radiated Tortoises, there is always a slight chance for error until they either lay eggs or show their penises.

Have you tried running warm water over the plastron to see if either one will evert a penis? This takes a lot of time and patience, but it works. Sometimes you have to do it on a number of different days to get any result.

If you have a known male, has he tried to breed with these two possible females? Are they at all cooperative?

 

[zovick]

Here’s a photo I picked up. The one on the right is female. Left is male

Just FYI, those are my photos of a pair of Burmese Stars in you post #6. They are not Radiated Tortoises, in case you did not realize that.

 

[921]

Normally, I can sex my own Radiated Tortoises by 7 to 10 years of age and about 10" or so in length. Those two should be old enough and large enough now to tell the sexes, but with Radiated Tortoises, there is always a slight chance for error until they either lay eggs or show their penises.

Have you tried running warm water over the plastron to see if either one will evert a penis? This takes a lot of time and patience, but it works. Sometimes you have to do it on a number of different days to get any result.

If you have a known male, has he tried to breed with these two possible females? Are they at all cooperative?

Because I got the two Radiated tortoise only few months, I still not put them together with the known male one.
When I house them together in late April, I will observe their behavior.

Thank you so much for sharing experiences.

 

[921]

Normally, I can sex my own Radiated Tortoises by 7 to 10 years of age and about 10" or so in length. Those two should be old enough and large enough now to tell the sexes, but with Radiated Tortoises, there is always a slight chance for error until they either lay eggs or show their penises.

Have you tried running warm water over the plastron to see if either one will evert a penis? This takes a lot of time and patience, but it works. Sometimes you have to do it on a number of different days to get any result.

If you have a known male, has he tried to breed with these two possible females? Are they at all cooperative?

Finally, I think both of them are females.

Thanks for your advise.

 

[zovick]

Finally, I think both of them are females.

Thanks for your advise.

In the photo of #1, that female is lifting herself up (cooperating) for the male. You may actually have had a successful breeding there. Good luck!

I can't see enough of the rear of the tortoises to tell anything about the #2 animal.

 

[921]

In the photo of #1, that female is lifting herself up (cooperating) for the male. You may actually have had a successful breeding there. Good luck!

I can't see enough of the rear of the tortoises to tell anything about the #2 animal.

Ok, I will keep observing #2.

By the way, could you give me some advice about how to avoid scutation asymmetries of new born tortoise ? Thanks.

 

[zovick]

Ok, I will keep observing #2.

By the way, could you give me some advice about how to avoid scutation asymmetries of new born tortoise ? Thanks.

Yes, do not incubate the eggs at temperatures over 31.5C (88-89F). Safest would be to stay at or below 31C.

 

[921]

Thanks for your kindly help, Bill.

Finally, both of them laid egg, I house them together at late April.

#1 laid two eggs on 16 June, #2 laid six eggs this morning.

 

[TommyTheV]

Thanks for your kindly help, Bill.

Finally, both of them laid egg, I house them together at late April.

#1 laid two eggs on 16 June, #2 laid six eggs this morning.

That is really awesome. Were you able to hatch any of them?