Originally Posted by TurkeymanAu
Birdeo-you also repeated my question "How does the bird get the humidity down ? " Can you surmise if and how they do?
My view is that it is impossible for a bird to lessen or create a rel humidity LESS than the ambient rel humidity.
The clutch is always going to be between the ambient humidity and 70% odd when the bird sits full time.
The paranoia on weighing to achieve a 15% weight loss is akin to science and 'experts' running amok-with a total disregard of nature and common sense,
and misunderstanding of all the various monitoring values.
I have never weighed for weight loss or worried about it,nor concerned about room environment-dehumidifiers etc.etc.
Just got the right incubator environment/automatic turning in the setter and good nutrition for breeders.
At 25% rel humidity eggs get dryer-shells get harder and pores close thus actually inhibiting natural weight loss.
As I said the 25% figure should actually be 25*C wet bulb which equates to a rel humidity of around 50%.
Just hang a wet bulb thermometer in your incubator-it should be around 80-82*F
I was repeating what you said, not re-asking the question and I followed with my take on the matter.
The birds in the wild do it , I assume they regulate the humidity in ways such as getting up, shifting around , getting more air to the eggs for example.
like I said....it's hard to beat mother nature. All we're doing is trying to imitate the process , at best.
Exactly what all is involved in HOW they do it is beyond me...never thought much about it but they do it .
The weight loss guides/ suggestions have been studied for many many years, who are we to question the experts/scholars who have shown us them to be very reliable guides to follow and adhere to? IF you want a successful hatch without too many issues such as Dead in shells, sticky chicks, crooked toes, etc. then personally I find it best to follow their guidelines .
I also understand how to figure relative humidity per the wet & dry bulb conversion and understand the importance of how ALL aspects of your ambient temp., humidity, and air flow in your room ( again, it can affect what goes on in your incubator ) AND in you incubator come into play in order to get... yes....proper weight losses.
All those factors are relative, IE: interrelated .
Weighing the eggs work for me , that's my guide to keep close track of what the incubator parameters SHOULD be for proper weight losses .
Been incubating eggs for MANY years...I'm sticking to what the experts suggest and will continue using it as MY game plan.
I suggest... if you want to question some "experts" on the matter... that you may want to contact some authorities at some well known universities that have outstanding agricultural programs for starters but I get the feeling you would take whatever they say as " bunk ".
If 25% is working for 29Palms then that's great for him, I will not challenge that whatsoever and chances are it's a good starting point for most ostrich eggs that don't have extremely overly porous or thick smooth shell textures.
Don't forget again, eggs need to LOSE moisture during incubation, not take it in....this is your weight loss and what it's all about.
Curious also, where did you get the information that "At 25% rel humidity eggs get dryer-shells get harder and pores close thus actually inhibiting natural weight loss." ?
Edited by birdeo - 12/1/15 at 5:32pm