INCUBATING w/FRIENDS! w/Sally Sunshine Shipped Eggs No problem!

[Akrnaf2]

This is a translation of a post that I have written in a forum in Israel that I am one of its admins. I hope it will help thous that cano't see the development of the air cell in a very dark shell eggs:

Anyone who incubate eggs know that one of the most important parameters except the incubation temperature, is the humidity.

The accepted convention says that incubation eggs (in the first 19 days) should have humidity of 50% and during the hatching (days 19-21) humidity should move around the 75%.

I would like to say that such determinations are not absolute!

We must remember that moisture is the only means of bringing the egg weight loss necessary for the development of air cell. Chicken eggs have to lose 11-13 percent of their weight from day 1 to day 19 of incubation. This is the percentage that allows the creation of proper air cell and normal development! If the egg does not lose weight at the appropriate rate that the an air sack will develop properly, mean that the incubator humidity is too high and we need to reduce it! And if it losses weight that is higher than 11-13 percent and the air cell is greater than that needed, means that the humidity in an incubator is lower that what is needed, and we should raise it! The correct way to determine the correct incubation humidity present is to calculate the future weight loss of of the egg.

And the way to calculate this is:

You should weight the egg before entering it to the incubation. After the first 4 days ,in the first candling you weight it again. The gap weight (starting weight less weight on the fourth day), you divide the initial weight of the egg, the result should be multiplied by 100, that is the percentage of weight lost, percentage, for four days. Daily weight loss percentages can be known by dividing the result by 4.

To know the expected rate of weight loss of the entire incubation period you should multiplied the percentage of daily weight loss by 19. and this is the expected weight loss over the incubation. If it is between 11-13 percent humidity you are good, If it do not, you should correct the humidity levels!



for example:

If the initial egg weight is 56 grams

And after 4 days is 54.8 grams.


So: the ratio of weight lost in 4 days is:

0.0214 = (56 - 54.8):56

Multiple the result by 100

And This Is considered the weight loss percentages for 4 days:

0.0214 * 100 = 2.14%


2.14% are weight loss in 4 days. So to know the daily weight loss percentages is:

2.14% : 4 = 0.54%


Calculate the percentage of weight loss per incubation period (first 19 days):

0.54% * 19 = 10.3%


This humidity Value of 10.3% is lower than the minimum of 11% percent required, it means that probably that humidity in the incubator was higher than necessary and you have to reduce it!

Good luck

Thanks for posting.
That's exactly the way I do it. I can't see in most of the eggs anyway.
I don't even use a hygrometer since I threw them all away when they wouldn't stay calibrated. 
I use graph paper and make a chart with starting weight and target weight and draw a straight line between the two. Periodic weighing should be points on the line. That way I don't have to do the calculations each time I weigh.
If they lose too much weight, I increase the humidity and vice versa.
I weigh individual eggs upon collection. Then if only setting a few, I'll have a graph for each egg. If I'm setting a lot. I usually weigh two or 3 dozen at a time. I still spot check individual eggs because occasionally one or two eggs will lose at a much different rate than the rest.

Only one thing more, you should know that the evaporating pace is dependent on the s/v of the eggs! Big eggs have little s/v so they less evaporating than small eggs that have a big s/v, in the same external humidity and temp.

 

[Chaos18]

Quote:

Don't lie...you & Chaos didn't even know I was gone 'til I came back

I cannot tell a lie...........it was her idea.

Might want to remember that spot... in case you ever get locked out of the house... I mean... stuck outside.

This is not a funny joke...........as I did get locked in my turkey coop once. Luckily for me I had my cell phone on me. Otherwise I would have had to repair the door.

I have 17 eggs ready for the incubator. We all know it is unlucky to have an odd number, so I must collect at least seventeen more. Right?

You're so shmart

oh except Miss Mrs or SAL GAL then I have ye head

What about Mommom?

You guys are killing me with the coffee talk. I ran out this morning, and probably will be out for two days to a week longer!

I will file this under the "It Stinks to be you" folder heading

Hard enuf keeping up on this one!
And no fair trying to make off with Sally's minions

Woohoo I'm a minion

ALWAYS have a plan and we also have a electric alarm if we loose electric! you just plug it into an outlet and it sounds when you loose it! and its cheap!

$6.00

http://www.ebay.com/sch/i.html?_fro...tic+Alarm+Warning+Siren+Led+Indicato&_sacat=0

Wait how does an electric alarm work if there ain't no electric to set it off?

Solution is simple.





Send me your legbars

Well, when you stop up to get hers swing by my place and I'll throw mine on the wagon heading south.

Monin

I want coffee! :-((

If you want to drive to my house I'll share mine.

 

[LocalYokel]

Quote:
I cannot tell a lie...........it was her idea.

This is not a funny joke...........as I did get locked in my turkey coop once. Luckily for me I had my cell phone on me. Otherwise I would have had to repair the door.

You're so shmart

What about Mommom?

NO

I will file this under the "It Stinks to be you" folder heading

Woohoo I'm a minion

Wait how does an electric alarm work if there ain't no electric to set it off?

Well, when you stop up to get hers swing by my place and I'll throw mine on the wagon heading south. SHWEET

If you want to drive to my house I'll share mine.

 

[Pensmaster]

Monin

Morning LocalYokel gosh you were on fire last night with all the talk. I checked out at 9:00 turns out I only had to wait another 15 minutes and everybody was gone.
Loved the bear story

 

[Pensmaster]

I want coffee! :-((

I'll go make some right now. Morning motorcyclechick

 

[LocalYokel]

Morning LocalYokel gosh you were on fire last night with all the talk. I checked out at 9:00 turns out I only had to wait another 15 minutes and everybody was gone.

Loved the bear story

I ferget

Monin

 

[Pensmaster]

Morning everyone

 

[Pensmaster]

I ferget

Monin

 

[Chaos18]

Morning everyone

Guten Morgen

 

[Sally Sunshine]

mornin y'all!

Akrnaf2 Chaos18 Pensmaster Ur-ur-ur-urrr azkc scottcaddy










LOCKDOWN !!! mixed bantams from a friend, legbar and 1st gen protect birds!!