Does incubator temperature influence hen/rooster development?

[rhea]

Read somewhere maintaining the temperature one degree higher than called for hens develop/hatch, one degree lower roosters develop/hatch (or was it the other way around?). Theory being the change in temperature supports the particular development of that sex. Anyone heard of or tried this?

 

[Ridgerunner]

I've heard that. Once a myth gets started, it never goes away.

The science is that the hen determines the sex of the chick by which genes she donates to the gene pool. If there were any truth in this myth, we would not be able to make sex links.

BUSTED!!!!!

 

[Lucky1]

I heard that 1 degree above you get more males, and 1 degree less you get more hens, but that is an old wives tale, what actually happens is that when the temp is higher, you kill more females in their shells, and when the temp is lowered more males end up dyeing/ not developing. (From what i have heard)