Does incubation temperature affect sex of developing chick embryo

Chicken Keith

Songster
12 Years
Jun 1, 2007
265
50
186
Huntsville, Alabama (Go Vols)
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?
 

Squishy

Songster
8 Years
Feb 2, 2011
2,428
9
196
Florida
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?
lau.gif
 

deerman

Rest in Peace 1949-2012
11 Years
Aug 24, 2008
9,491
113
293
Southern Ohio
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
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deerman

Rest in Peace 1949-2012
11 Years
Aug 24, 2008
9,491
113
293
Southern Ohio
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

cracked egg
10 Years
Jul 15, 2009
790
32
189
King and Queen Co, Va
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

Rest in Peace 1949-2012
11 Years
Aug 24, 2008
9,491
113
293
Southern Ohio
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....
lau.gif
 

Cass

Songster
9 Years
Jan 6, 2011
2,896
190
198
Albany, NY
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....
lau.gif


yuckyuck.gif


What color eggs are the girls?
 

doxies1

Chirping
9 Years
Nov 16, 2010
210
1
99
West centeral Maryland
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.
 

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