Does incubation temperature affect sex of developing chick embryo

[Chicken Keith]

I'd read something on this before but wasn't sure if the higher temp makes a girl or a boy. I incubated 23 silkie eggs in 2007, 19 hatched and 17 would be cockerels. I think maybe temperature at incubation might've been a factor?

 

[rebelcowboysnb]

Wrong temp will kill more males than females so in a way yes but no it wont turn boy eggs in to girl eggs.

 

[SourRoses]

Nope.... Birds aren't like reptiles that way. The sex of mammals is determined immediately upon fertilization. A result like yours must have been due to genetics. That's a large percentage that hatched... and say they all hatched and the rest were female.. that would be 17 males and 6 females. 75% male to 25% female. A more normal ratio would be 50%/50%. If you don't want yet more Roos, maybe you shouldn't let them fertilize anything?

 

[deerman]

Quote:
no , birds sex determined like mammals not reptiles

normal % are 50 /50 thats over very large number, so make you few bad somewhere , somebody got mostly pullets

 

[SourRoses]

Isen't that what I said? LOL

 

[deerman]

Quote:
No not what you said.....birds aren't like reptile.......but BIRDS ARE NOT MAMMALS.....unless they have fur(hair).....no biggie didn't see where you said birds sex was at fertilization..........

 

[Barred Rocker]

My understanding is unlike mammals. The female (hen) determines the sex at fertilization. I've heard so many wives tales about how to get more hens than roos but it's ultimately going to be whatever the hen produces. I did hear somewhere that the ph level in their drinking water could affect the sex ratio however I'd think if anythings been scientifically proven we'd have heard about it by now.

 

[deerman]

Quote:
Yes sex chromosome are switch from mammals and birds,,,reason albino is carried hiden my women humans and male birds.


Oh just get EE , eat the blue eggs those are the males....

 

[Cass]

Quote:
Yes sex chromosome are switch from mammals and birds,,,reason albino is carried hiden my women humans and male birds.


Oh just get EE , eat the blue eggs those are the males....

What color eggs are the girls?

 

[doxies1]

I read recently, (I think on this forum) of someone doing a study to determine if feeding sorghum increases the ratio of pullets. One would have to raise a lot of fowl to have a significant sample size.