Heritage Large Fowl - Phase II

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Here, Sarah,
Circadian Incubation is an interesting topic. If you aren't interested in this, don't worry,
it will not make or break your hatching season. Just another arrow in the quiver. The
question here is if the exactness of temperature change can even be used in the
incubators the average breeder uses today. If not, this whole conversation is mute.
Basically....well I will let the experts explain it better than I:

Circadian incubation for broiler quality and robustness
http://www.worldpoultry.net/Breeder...erature-training-for-robust-chicks-WP010270W/
-------------------------
“Temperature training” during the last days of incubation: a new method to improve poultry
performance Barbara Tzschentke, Berlin and Ingrid Halle, Braunschweig
http://www.lohmann-information.com/content/l_i_45_artikel6.pdf
-----------------------
Thermal manipulations in late-term chick embryos have immediate and longer term effects
on myoblast proliferation and skeletal muscle hypertrophy Yogev Piestun1,2, Michal Harel1,
Miriam Barak1, Shlomo Yahav2, and Orna Halevy1 http://www.jappl.org/content/106/1/233.full
-----------------
124 The Open Ornithology Journal, 2010, Volume 3 Editorial Open Access Editorial
Early Development and Epigenetic Programming of Body Functions in Birds
http://benthamscience.com/open/tooenij/articles/V003/SI0124TOOENIJ/124TOOENIJ.pdf
=====================

In ovo temperature manipulation influences embryonic motility and
growth of limb tissues in the chick (Gallus gallus)
Christina L. Hammond*, Biggy H. Simbi and Neil C. Stickland Department of Veterinary
Basic Sciences, The Royal Veterinary College, Royal College Street, London,
NW1 0TU, UK *Author for correspondence (e-mail: [email protected]) Accepted 16 May 2007
http://jeb.biologists.org/content/210/15/2667.full.pdf
Summary The chick embryo, developing in the egg, is an ideal system in which to investigate the
effects of incubation environment on the development of the embryo. We show that raising the
temperature of the eggs by just one degree, from 37.5°C to 38.5°C, during embryonic days
(ED) 4–7 causes profound changes in development. We demonstrate that embryonic movement
is significantly increased in the chicks raised at 38.5°C both during the period in which they are
at the higher temperature but also 4·days after their return to the control temperature. Concomitant
with this increase in embryonic activity, the embryos raised at higher temperature grow to significantly
heavier weights and exhibit significantly longer leg bones (tibia and tarsus) than the controls from
ED12 onwards, although mineralization occurs normally. Additionally, the number of leg myonuclei
is increased from ED12 in the embryos raised at the higher temperature. This is likely to promote
greater leg muscle growth later in development, which may provide postural stability to the chicks
posthatch. These changes are similar to those seen when drugs are injected to increase embryonic
activity. We therefore believe that the increased embryonic activity provides a mechanism that can
explain the increased growth of leg muscle and bone seen when the eggs are incubated for 3·days
at higher temperature.
===============
Circadian incubation - Pas Reform *
http://www.pasreform.com/spanish/descargas/folettos/doc_download/137-incubacion-circadiana.html
Use "Search" window and keywords " Circadian incubation" , then download PDF to view.
The question here is if the exactness of temperature change can even be used in the
incubators the average breeder uses today. If not, this whole conversation is mute.
===================
http://positiveaction.info/pdfs/articles/hp26.4p11.pdf
synopsis of the entire topic from this URL:
Conclusions The ultimate goal of modern hatchery
management is to produce uniform, robust day old chicks. Robustness is a health criterion that
originates in the embryonic lifestage of the chicken and correlates directly with the performance
and resistance of individual chicks under differing farm conditions. Robustness requires a specific
incubation trigger during so-called critical periods, for example stimulation by heat or cold, to
physiologically imprint the embryo such that the chicken thrives in its farm environment. Short term
thermo-conditioning using Circadian incubation improves hatching results and produces long lasting
effects, with 1-2% increase in final body weight and 1-2 points better feed conversion rates. Batches
of uniform, robust day old chicks improve uniformity at slaughter age and thereby improve efficiency
and performance throughout the entire production chain. However, to support the use of Circadian
incubation, the incubator should provide accurate climate control, to promote tight temperature uniformity.
Each egg must receive a consistent flow of conditioned air for optimum thermal conditioning.
 
Last edited:
American Poultry Advocate, Volume 18 September 1910 , Page 624
Feather of the Barred Pullet. A Portrayal of the Defects of the Barred Plymouth Rock Pullet Feather
in a Way That Will Delight Every Breeder of This Variety. The Proper Length, Width, and Barring of
the Feather, Together With the Proper Spacing and Width of Bars Are Fully Explained.
By S. T. DIVINIA, St. Joseph, Mo.
http://tinyurl.com/k4dvqc2
 
Last edited:
Are my Leghorns even close to type? I only have the two, but they are the only chickens I have that are not TSC.

My rooster has some frostbite on his comb due to the recent cold weather.

700



700



700



700
 
3riverschick said:
Here, Sarah,
Circadian Incubation is an interesting topic. If you aren't interested in this, don't worry,
it will not make or break your hatching season. Just another arrow in the quiver. The
question here is if the exactness of temperature change can even be used in the
incubators the average breeder uses today. If not, this whole conversation is mute.
Basically....well I will let the experts explain it better than I:

Circadian incubation for broiler quality and robustness
http://www.worldpoultry.net/Breeder...erature-training-for-robust-chicks-WP010270W/
-------------------------
“Temperature training” during the last days of incubation: a new method to improve poultry
performance Barbara Tzschentke, Berlin and Ingrid Halle, Braunschweig
http://www.lohmann-information.com/content/l_i_45_artikel6.pdf
-----------------------
Thermal manipulations in late-term chick embryos have immediate and longer term effects
on myoblast proliferation and skeletal muscle hypertrophy Yogev Piestun1,2, Michal Harel1,
Miriam Barak1, Shlomo Yahav2, and Orna Halevy1 http://www.jappl.org/content/106/1/233.full
-----------------
124 The Open Ornithology Journal, 2010, Volume 3 Editorial Open Access Editorial
Early Development and Epigenetic Programming of Body Functions in Birds
http://benthamscience.com/open/tooenij/articles/V003/SI0124TOOENIJ/124TOOENIJ.pdf
=====================

In ovo temperature manipulation influences embryonic motility and
growth of limb tissues in the chick (Gallus gallus)
Christina L. Hammond*, Biggy H. Simbi and Neil C. Stickland Department of Veterinary
Basic Sciences, The Royal Veterinary College, Royal College Street, London,
NW1 0TU, UK *Author for correspondence (e-mail: [email protected]) Accepted 16 May 2007
http://jeb.biologists.org/content/210/15/2667.full.pdf
Summary The chick embryo, developing in the egg, is an ideal system in which to investigate the
effects of incubation environment on the development of the embryo. We show that raising the
temperature of the eggs by just one degree, from 37.5°C to 38.5°C, during embryonic days
(ED) 4–7 causes profound changes in development. We demonstrate that embryonic movement
is significantly increased in the chicks raised at 38.5°C both during the period in which they are
at the higher temperature but also 4·days after their return to the control temperature. Concomitant
with this increase in embryonic activity, the embryos raised at higher temperature grow to significantly
heavier weights and exhibit significantly longer leg bones (tibia and tarsus) than the controls from
ED12 onwards, although mineralization occurs normally. Additionally, the number of leg myonuclei
is increased from ED12 in the embryos raised at the higher temperature. This is likely to promote
greater leg muscle growth later in development, which may provide postural stability to the chicks
posthatch. These changes are similar to those seen when drugs are injected to increase embryonic
activity. We therefore believe that the increased embryonic activity provides a mechanism that can
explain the increased growth of leg muscle and bone seen when the eggs are incubated for 3·days
at higher temperature.
===============
Circadian incubation - Pas Reform *
http://www.pasreform.com/spanish/descargas/folettos/doc_download/137-incubacion-circadiana.html
Use "Search" window and keywords " Circadian incubation" , then download PDF to view.
The question here is if the exactness of temperature change can even be used in the
incubators the average breeder uses today. If not, this whole conversation is mute.
===================
http://positiveaction.info/pdfs/articles/hp26.4p11.pdf
synopsis of the entire topic from this URL:
Conclusions The ultimate goal of modern hatchery
management is to produce uniform, robust day old chicks. Robustness is a health criterion that
originates in the embryonic lifestage of the chicken and correlates directly with the performance
and resistance of individual chicks under differing farm conditions. Robustness requires a specific
incubation trigger during so-called critical periods, for example stimulation by heat or cold, to
physiologically imprint the embryo such that the chicken thrives in its farm environment. Short term
thermo-conditioning using Circadian incubation improves hatching results and produces long lasting
effects, with 1-2% increase in final body weight and 1-2 points better feed conversion rates. Batches
of uniform, robust day old chicks improve uniformity at slaughter age and thereby improve efficiency
and performance throughout the entire production chain. However, to support the use of Circadian
incubation, the incubator should provide accurate climate control, to promote tight temperature uniformity.
Each egg must receive a consistent flow of conditioned air for optimum thermal conditioning.
Click to expand...

Interesting stuff. I would like to dig into this a little further. But the odds of my being able to regulate incubation temperature that closely - especially with my equipment - are... hmmm... about the same as the earth's magnetic poles flipping tomorrow? Hey, it could happen.

Thanks for the info.

Sarah
 
MagicChicken said:
Interesting stuff. I would like to dig into this a little further. But the odds of my being able to regulate incubation temperature that closely - especially with my equipment - are... hmmm... about the same as the earth's magnetic poles flipping tomorrow? Hey, it could happen.

Thanks for the info.

Sarah
Click to expand...
I agree, Sarah. I have digital auto humidity in my Brinsea Mini Advanced. But I don't think it is adjustable?
If it is adjustable, then one as to be there for the certain hours over the certain days to ramp
it up a degree and then lower it again hours later. Plus, at least 2 of the reference say it results in s much
as 20% more cockerels. Guess that is a good thing if one is raising broilers/roaster?

Hum,
Karen
 
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