Does Blue lighting effect chick sex?

[EggWalrus]

I plan on having my brother to come give me a hand with the scalding and plucking, try to do about 20 one day soon. The last one we eat one at about 16 weeks old looked like a Cornish hen by the time he was on the table. I dressed out an Ameraucana rooster about 10 months old last week that wasn't much bigger than a store bought fryer hen. I guess he was slow growing and all feathers.

 

[WannaBeHillBilly]

Earlier today I read a post that stated hens subjected to blue lighting (like from aquarium light bulbs) will result in more female chicks being hatched. I have goggled, binged, and used other search engines but can't find much on this subject. I know the temp of reptile eggs can effect the sex of the offspring, I have no clue about any correlation in chicken eggs.
If any one has any evidence for lighting or temps leading to more hens instead or roos being hatched, PLEASE post it.
Seems like nearly all my birds that hatch around here are eaters, not layers!

"Blue Light makes more females" sounds like humbug to me!
And you cannot compare birds with reptiles even though they evolved from them. There is an older post here in this site where somebody tried to increase the female to male ratio in favor of females with ducks by increasing the temperature of the incubator to 100F. And voila, more females than males hatched! But that was because most of the male chicks died and not like with reptile eggs the gender was determined by the temperature. Granny once said »if you want a son, wear socks in bed…« - Humbug!

 

[EggWalrus]

"Blue Light makes more females" sounds like humbug to me!
And you cannot compare birds with reptiles even though they evolved from them. There is an older post here in this site where somebody tried to increase the female to male ratio in favor of females with ducks by increasing the temperature of the incubator to 100F. And voila, more females than males hatched! But that was because most of the male chicks died and not like with reptile eggs the gender was determined by the temperature. Granny once said »if you want a son, wear socks in bed…« - Humbug!

It sounded might sketchy to me also. But who knows. I've thought about trying it. I doubt it could hurt them. And if it turns out it works for chickens like Dr Karen Becker's birds, it would be worth the experiment. I'm not saying it will work, just willing to give it a try. I'm sure lots of people thought using light in winter to keep chickens laying was a crazy idea till it was proven. I've also wondered, since diet of the breeder hen effects hatchability, could diet effect sex ratios. If someone could figure out a way to get a higher percentage of females to males it could be a tremendous discovery.