using extremely high temps to hatch only females

[HuffleClaw]

Amother (and more researched) experiment would be to hatch refrigerated eggs. That has also been said to kill male embryos. Of course, that may be completely false.

 

[Nebraska islander]

Eggs being set (in temperature controlled location) must be at 60 to 65 degrees, 55 is assured infertility. Eggs continue to develop at 70 degrees or warmer although at a slower rate than your 99,7 optimal temp for incubation . I have eggs survive overheating temps up past the alarm setting of 101.5 alarm setting in heat of summer but at 50% less hatch rate down from 89.7% average at controlled setting of 99.7. I don't even collect eggs from birds for incubating until overnight temps stay above 60 degrees.
I have had malfunctions to temp controlled setting device allowing refrigerator to dip below 55 degrees(more times than I care to admit when controller probe dies) and have never been able to hatch a single egg out of futility since its generally a entire week of hatching eggs.
You can set a egg for up to 10 days if necessary but throws off the production line space for myself. All my eggs in my incubator will all hatch in a couple hour time span like clock work if done correctly.
I have never seen any temp vs sex correlation and if your egg is refrigerated less than 60 degrees don't waste your time, This is a income conclusion for me, experimentation without a valid reason doesn't feed my family. If you have time to waste, good for you , but It is food on my table and can't make assumptions and you know " like getting hit over the head with a hammer" when temperatures at night dip below 60 at night when your hatching season is over. You can go from 750 chicks down to maybe 12 when it happens.

That speaks volumes in itself. Doesn't matter if its chickens, turkeys, pheasants or quail. Been doing this for 20 plus years...
I'm just saying, experimentation doesn't pay my bills..

 

[BreezyBre]

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1629050/
Some science on the topic ...

 

[cooingdove]

Has anyone tried this, or read any articles on it?
yes, yes, I know roosters are important- but as a person who always gets 80% roosters I am wondering if this has been done. I know with other species (human for example) female sperm can survive less than ideal conditions much better than male- so I was hoping someone else had done an experiment.... otherwise I might.

ok I have a few questions, 1 are you using the broody hen hatch method? 2how many roosters do you have? 3 what brand of incubator do you use?

 

[JacinLarkwell]

ok I have a few questions, 1 are you using the broody hen hatch method? 2how many roosters do you have? 3 what brand of incubator do you use?

What do those questions have to do with the sex ratio?

 

[NatJ]

ok I have a few questions, 1 are you using the broody hen hatch method? 2how many roosters do you have? 3 what brand of incubator do you use?

Answers in previous posts:

hatch 1 (under broody- my eggs) 9 eggs hatched, 6 roosters
hatch 2 (under broody- my eggs) 6 eggs hatched, 5 roosters
hatch 3 (under broody- my eggs) 6 eggs hatched, 5 roosters
hatch 4 (under broody- my eggs) 4 eggs hatched, 3 roosters
hatch 5 (incubator- all bought eggs) 33 eggs hatched, 19 roosters
hatch 6 (incubator- mine & bought eggs) 32 eggs hatched, 17 roosters
hatch 7 (under broody) 8 eggs hatched, I think 6 are roosters (maybe only 5)
hatch 8 (incubator-my eggs) 13 eggs hatched -I think 8 are roosters but they will have pea combs and its too early to tell...but I think 8 because of their legs and stance.

So..now you see why I want to find a way to get less roosters.

( by the way each year has been a different rooster ) I’ve never had same rooster for more than one season )

my flock is 25 but I usually pick different hens to hatch from depending on what im trying to achieve. ID say maybe 10 of the 25 I've hatched eggs from

If the brand of incubator was listed, I must have missed that one.
But since most of the really weird sex ratios are under broody hens, the incubator can't be causing those.

And there are a number of different hens and roosters involved (hen determines the sex of the chick--birds are backwards from how mammals do it.)

 

[cooingdove]

What do those questions have to do with the sex ratio?

well I've heard that if you hatch under a chicken there are more roosters, I don't know I'm just trying to figure out why @Minky gets so many roosters.

 

[cooingdove]

hatch 1 (under broody- my eggs) 9 eggs hatched, 6 roosters
hatch 2 (under broody- my eggs) 6 eggs hatched, 5 roosters
hatch 3 (under broody- my eggs) 6 eggs hatched, 5 roosters
hatch 4 (under broody- my eggs) 4 eggs hatched, 3 roosters
hatch 5 (incubator- all bought eggs) 33 eggs hatched, 19 roosters
hatch 6 (incubator- mine & bought eggs) 32 eggs hatched, 17 roosters
hatch 7 (under broody) 8 eggs hatched, I think 6 are roosters (maybe only 5)
hatch 8 (incubator-my eggs) 13 eggs hatched -I think 8 are roosters but they will have pea combs and its too early to tell...but I think 8 because of their legs and stance.

So..now you see why I want to find a way to get less roosters.

yes I totally do!

 

[JacinLarkwell]

well I've heard that if you hatch under a chicken there are more roosters, I don't know I'm just trying to figure out why @Minky gets so many roosters.

No. That's completely false. The hen determines gender at conception and a broody hen is at the perfect temperature and humidity. I have one hen that is always skewd towards more females (latest batch was like 9 gals and just a little boy) and another that had 3 males and 1 girl. All were broody hatxbed and the others in that flock are usual pretty 50 50

 

[cooingdove]

Amother (and more researched) experiment would be to hatch refrigerated eggs. That has also been said to kill male embryos. Of course, that may be completely false.

that interesting!