Woma sex ratios

[JasonL]

Just a question... anyone had any very lop sided sex ratio's with Womas? As my first clutch of 9 eggs have all probed males... they all went over 70 days and hatched as very large robust healthy critters, as I have a few things in my inc I had it on the cool side, around 30 - 31.5 (never over that temp)... any Ideas? surely thought even with my bad luck there would be at least one of the opposite sex in there......

 

[billiemay]

Hasn't anyone done research into this? It's really odd for the majority to be males in a species, you only need one . Are ones found in the wild mainly males as well?

 

[zulu]

re Woma

Just a question... anyone had any very lop sided sex ratio's with Womas? As my first clutch of 9 eggs have all probed males... they all went over 70 days and hatched as very large robust healthy critters, as I have a few things in my inc I had it on the cool side, around 30 - 31.5 (never over that temp)... any Ideas? surely thought even with my bad luck there would be at least one of the opposite sex in there......

Happens with stimsons also jason,studys are supposed to show otherwise ime told,but yeh,in practice with some of these species temperature plays a part in the sex ratio it seems.

 

[orientalis]

Hi Jason,

I think you will find that the majority of records available for Aspidites Ramsayi with regard to breeding results and sex ratio's, Males tend to be the higher ratio.

In my experiences this has also been the case, overall.

Not sure of any single sex clutches personally, but obviously it would be a possibility.

One of my woma's i let do a meternal incubation this year, she was basking every morning and got her body temp up to 41 and raised the surface temp of the eggs to 36.6, they all hatched without defect, 56/57 days and i am holding these to breed from, mostly females was my result.

I think that if you calculated say 100 clutches and averaged the stats, you would end up around 1m : 0.8 f, obviously each clutch can range and have extremes.


Hope this helps

will you be raising or selling your animals??

 

[Helikaon]

yeah i have had almost the same in my stimsons, last year 80 percent girls 20 percent boys, this year had some hot days and had 80% boys 20 % girls.

 

[JasonL]

Yes, I know some people who breed 90 - 100% same sex clutches from stims... though havn't heard of it happening with womas as yet, not 100% out of a sizable clutch anyway, though I'm sure it does from time to time..... just not happy it happened to me :lol:....
Orientalis, think I will be selling them as I don't need 9 males :lol: , though I will keep at least 1 back as I only have the 1 adult male now.... in no hurry to sell them though, happy if it takes 12 months to move them, they are really nice coloured large animals and look just fine sitting in my rack , just hope the next clutch has some girls so I can pair them up....

 

[PilbaraPythons]

Jason
Great topic and one I have been thinking about lately myself.
Anyway, I actually get far more females out than males but all my friends seem to get a huge proportion of males as you have experienced. The clear difference however between what I do and my associates, is that I normally use maternal incubation. What part this plays in the end result is so far a mystery but surely worthy of further understanding. In my opinion a huge proportion of males would not be the normal in the wild because if this was the case they would eventually wipe themselves out.

Cheers Dave

 

[JasonL]

I agree Dave, it really does not add up as "natural" in my head either...

 

[bigguy]

Jason

Snakes are born with a sex gene and are not determined by temperature at all. Crocs,turtles, tortises,that funny New Zealand thing, and some lizards(like few Ausie Dragons) are effected by temp, but not snakes.

Many times I have had 1 sex majorities from a clutch, only to find other clutches in the same incubator to be average, or even majorities of the opposite sex. Its just the luck of the draw.

 

[CodeRed]

Try another male.

One of my jungles has had predominantly male clutches for the previous 2 seasons. This year I used another male and got 11 females and only 4 males. Same thing happened with a stimmy female. For the previous 3 seasons she had nearly all females. This season I bred her with her son and out poped a clutch of nearly all males. The same incubator and temps where used for all the clutches.

 

[JAS101]

.

This season I bred her with her son and out poped a clutch of nearly all males. The same incubator and temps where used for all the clutches.

i thought inbreeding was a big NONO in the snake world?

 

[CodeRed]

i thought inbreeding was a big NONO in the snake world?

Are you kidding. i suggest you read around a bit more. That topic has been done to death. Its common practice and has been shown to have no side effects for quite a few generations. How do you think we got the thousands of albino darwins from one female?

 

[Poggle]

ive had that prob with stimmies but never bred or even owned womas. and as far as inbreeding well personally i wouldnt do it...... but jason... i believe you now have some womas for sale lol

 

[Sock Puppet]

Recently picked up my first Woma from a clutch of 5 - 4x female, 1x male

 

[JasonL]

Jason

Snakes are born with a sex gene and are not determined by temperature at all. Crocs,turtles, tortises,that funny New Zealand thing, and some lizards(like few Ausie Dragons) are effected by temp, but not snakes.

Many times I have had 1 sex majorities from a clutch, only to find other clutches in the same incubator to be average, or even majorities of the opposite sex. Its just the luck of the draw.

Yeah Bob, I am well aware of how it is supposed to work, though I still question most facts out of interest... Bearded Dragons weren't supposed to be effected at all, that was untill a couple of years back when they found that high temps can turn male sex genes into females...

 

[JasonL]

Try another male.
QUOTE]

:lol: OK, in 18 months

 

[pythons73]

It would be a fascinating topic to determine if temperature was the reason in some clutches as to why theres so many females-males.I would imagine that the temperature would be a factor as to why the sex ratio is alot higher with more males-females..MARK

 

[JasonL]

Well the male in question is my favorite coloured woma, so I'll be sure to use him many times over the next umteen years, I guess I'll just have to wait and see eh...

 

[bigguy]

If you had numerous clutches of the same species in the same incubator, and they all hatched the same sex, then it would be interesting. But when theres several clutches, and only one produces the same sex, then its just the parents with a dominent sex gene. As code red stated, try another male.

 

[Serpentes]

You need to have split-clutches in several different incubators to take into account both maternal and incubation effects. So it takes a large number of eggs to check for TSD. Anyway, Aspidites don't have TSD, or if they do it is overrridden by GSD or incubation requirements (ie steady temperature), and not functional. The incubation requirements for Australian pythons just don't lend themselves to TSD. You would get dead eggs before any developmental changes.

There's always the chance you just fluked males, they probed weird, otherwise you've got a man-loving male (genetically; he can't help it ).