[Baltazaar2010]

Looking to compare notes with other Lygo Breeders
with sex ratio problems of Lygos.
Anybody out there?

[hexentanz]

What kinds of problems are you seeing? What are your incubation temps?

[Baltazaar2010]

I have been experiencing heavy male offspring 99%.At first adults were kept at 86 F.Daytime,76F-78F nightime.All male offspring 30 of them.

Now I keep 82F-83FDaytime,72F-74F nightime,I have 9 offspring from this temp.Most not mature to sex correctly.The oldest 2 also appear male.

I have 11 eggs also,right now just starting to hatch,that I incubated separately.
These at 77F,daytime,69-70F nightime.I have 2 babies just hatch yesterday.

I have produce 40 of them mature enough to sex all male except for 2 females.All these were from 2 pair of animals.

I WISH THEY WERE GUIMBEAUI YA?

[Baltazaar2010]

Forgive me,I forget .All are williamsi

[hexentanz]

82-86F even with drops at night are pretty much fail proof temps for hatching males.

72-77F is perfect for hatching females.

78-82F would be the in between for either or.

Just like with Phelsuma temperatures play a big part in sex ratio.

[Baltazaar2010]

Thanks Maureen,


Hopefully,some of the other eggs and offspring will be female.My biggest worry was that they may be eviromental sex determination.ZW control by the female.

Has anyone found out whether mauritian phelsuma are zz/zw??

Worked with them for years producing tons of females,not to mention drab/pale coloration compared to wildcaught.Used to get all my animals
from Herman Oostveen in Holland.

I know you Euro guys always are on the cutting edge of terrarium culture.
Always have been and always will I think.


Best regards,
Albert

[hexentanz]

Albert,

Some females of Phelsuma do tend to produce offspring which are heavily female no matter the temps used during incubation.

I have yet to hear or run in to this with Lygodactylus yet.

WC animals will always be brighter than CB. Nature provides far more lighting variety than we can provide in captivity. But there is always the possibility to house your CB animals outside (in non direct sun) for a few hours a day during warmer months to make their colors really pop.

[Chum]

Maureen,

Since you have experience with what exact temperatures give what in sex ratios for lygos do you happen to have hatch time data to go with that?

It would be a VERY good information if it was possible to get an idea of the gender based on the hatch time.

I would imagine it could be something like this: 50-70 days males,70-90 females and 90-110 females?
(numbers above are pure guesses and just something I could imagine beeing the actual case - I have no data to support it)

[Baltazaar2010]

Chum's right on it.The cooler incubated eggs of mine are an easy 90-100
days.Just had the first hatch yesterday.We'll see what comes out of them.

On phelsuma though,Not to disagree with anyone,but from my own experience
I don't believe that some species just give lots of female offspring.I believe there is some enviromental que that triggers male production by the female.

I've lived in both Madagascar,Mauritius,visited the Comoro isles and
in the wild the and sex ratios of wild phelsuma are about equal.

Also,Another interesting fact that many breeders probably have already experienced is that...NEWLY IMPORTED WILD CAUGHT FEMALE PHELSUMA OFTEN will throw male offspring in the begining of captivity.After 4-6 months the ratio will turn to 100% female.WE ARE DOING SOMETHING WRONG IN OUR KEEPING.

NEED SOME IMPUT HERE FROM PEOPLE THAT GET FRESH GUIMBEAUI FROM HAWAII.ABOUT PRODUCING MALES IN THE BEGINING OF ACQUISITION OF WILD FEMALES OR PAIRS FRESHLY CAUGHT.

Because of this I bought several extra female Lygos,1 month ago.To pair up all those males I have been producing.THey were terrible shape,had to use pancur,flagyl,albon.have 2 eggbound right now and 4 eggs from the new imports.

So,I have total of 10 pairs,2 original,8 New arrivals,a few eggs from the new arrivals right out of the box from tanzania,So,we have plenty of subjects
to work with.LET's all keep in touch and get the real scoop on these guys.

Maureen is discribing type 2 TSD.Let's see if She's right.I'll put my money on you Maureen!!!!

Albert

[hexentanz]

@Chum - This is honestly something I gave up in calculating long ago with my Lygos. I have a lot of eggs and have hatched out a lot - you could say I have eggs coming out of my ears. Also another problem is many of my females lay eggs all over the place (against my wishes), some get taken out of the tank where possible, but the majority stay in the tank. So I feel the data would never truly be accurate in these settings with them all over the place in various temperatures. That said all I collect now is the date eggs were laid, the days until they hatched as well as date and if both eggs managed to hatch along with temperature (where possible).

The only things I did ever learn when I calculated Male/Female ratios was the temperatures in which to hatch a specific sex and that indeed the speculation of TSD was true with Lygos as well.

I suppose if everyone is really interested I could start calculating this again with the eggs that I have actually managed to remove? This data alone would be far more accurate.

@Baltazaar2010 - Of course WC and CB will always differ on many levels. But for discussing Phelsuma, we should really be doing this in the Phelsuma section of the forum.