Chick length and Organ development

Forum: Chick length & Organ development

Published on: 08/26/2006
Author/s : Inge Reijrink M.Sc. - Roos Molenaar M.Sc. (HatchTech Incubation Technology)
HatchTech Incubation Technology has put a lot of efforts in research on the relation between chick length at day 0 and the chick weight at day 7. Results showed a positive relation between chick length at day 0 and chick weight at day 7. A longer chick at day 0, has a higher development and growth potential than a shorter chick. A longer chick has probably on day 7 also better developed organs tha...
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Victor Hugo Galindo Galvez Victor Hugo Galindo Galvez
Veterinary Doctor
August 26, 2006

Do you continued this research until the chicks were procesed at the slaughter house? If yes, I would like to get the information about body weight, feed conversión, carcass quality, etc.

Reply
Rose Molenaar Rose Molenaar
Research
October 13, 2006
Dear Víctor Hugo Galindo,

We did not follow the chicks till slaughter age in this trail. We are currenlty working on a trail were we do follow the chicks from set eggs till slaughter age. As soon as we have all data analysed, we can give you more information.

Kind Regards,

Inge Reijrink & Roos Molenaar
Reply
April 16, 2008
As an incubator company, what is your suggestion to produce more longer chicks? Did strain is also have a contribution to the chick length?

Tranggono
Hatchery Manager PATRIOT, Indonesia
Reply
Rose Molenaar Rose Molenaar
Research
May 9, 2008

Dear Mister,

Your question was how you can produce longer chicks. First of all there are a lot of factors influencing chick length and therefore chick quality. Two of them are breeder strain and age of the breeder flock.

Another factor influencing chick length is the incubation process, which needs to fit to the requirements of the embryo. Our recommendation is to incubate chicken embryos at an eggshell temperature of 37.8ºC (=100F). The eggshell temperature differs from the environmental temperature in the incubator. The environmental temperature needs to decrease in time to incubate at an eggshell temperature of 37.8C (=100ºF), especially after 10 days of incubation when the embryos start to produce more and more heat.

An easy method to measure this eggshell temperature is by using an infrared thermometer and measure the temperature of the eggshell. Such an thermometer is available at HatchTech Incubation Technology.

Regards,

Inge Reijrink & Roos Molenaar

Reply
May 13, 2008
In addition you can also use the most common Braun Thermoscan (Ear Thermometer) to measure eggshell temperature. The thermometer is available in most parts of the world (for those who have problems with importation of tools).
Reply
May 14, 2008

This is amazing. I need to know the name of the broiler breed from which eggs were taken to perform this trial and in which country. What was the difference in weight gain on day 31 and day 35 of the chicks hatched from HatchTech incubators in relation to the chicks hatched from other brands of incubators using eggs from the same breed? Thanks to HatchTech technology. Go ahead with your R & D.

Dr Sabur
CEO & Poultry Industry Specialist
FTDC Trade & Consultation
Dhaka, Bangladesh

Reply
Munawar Ali Munawar Ali
Doctor of Veterinary Medicine
May 14, 2008

Dear Ing Rejink and Roose,

Excellent work.
Have you cheaked the size and capacity of lungs also in longer chicks?
Does longer chicks have less incidence of Ascities?
When your trial is completed, please calculate the F.C.R. of feed also.
Waiting for reply,
With best wishes and regards,

Dr. Munawar Ali

Reply
May 14, 2008
Dear,
Please inform me about CR after your research.
Reply
Rose Molenaar Rose Molenaar
Research
January 19, 2009

We have evaluated the relationship between hatchling length or weight and slaughter weight, breast meat yield and feed conversion ratio (FCR) in both male and female broilers in two experiments.

Results showed that in male broilers a positive relationship was found between hatchling length and slaughter weight or breast meat yield, but no relationship was found with hatchling weight. In female broilers, a negative relationship between hatchling weight and breast meat yield was found. The relation between chick length and performance was not found in the first experiment, but in the second experiment we found a positive relation. No relationship between hatchling length and FCR in both male and female broilers was found.

We concluded that hatchling length rather than hatchling weight seems to have a predictive value in males for slaughter weight and breast meat yield. In females, this is less clear. Additionally, FCR seems not to be related with hatchling length.

Results of this experiment are published in World’s Poultry Science Journal, 2008, Volume 64, p. 599-604

Reply
March 20, 2009
I am a Hatchery Manager to largest hatcheries in the middle East. I am working in HatchTech Setter in our hatchery. We found already higher chick length than with another setter.
Reply
April 15, 2009

This article does not reveal the relation of egg size with chick length. Age of the flock also has impact on chick length. How a hatchery manager expects more chick length from early weeks of egg production.

Reply
Muzzamal ijaz Muzzamal ijaz
Msc.(Hons.) Animal Nutrition
April 16, 2009
Hi dear,
no doubt the lenght of organs is important, but there are also other things that must be in your understanding such as breed, age of breeder, egg size, etc.
Thanks.
Reply
Ganesh Kumar Dahal Ganesh Kumar Dahal
Managing Director MDH Pharmaceuticals Pvt.Ltd.
April 16, 2009
Interesting!! It is good effort put in by the researchers. A comparative study on same breed against different hatching incubators would have been convincing for hatchery owners/managers.
Which breed was used? Is it possible to get longer length of chicks without genetically potential? Other factors like mature right age of male bird and right incubation process may play vital role to improve the size of chicks.
Reply
April 16, 2009

It's a nice work. I believe early mortality was much less in large chick length group. Do you have data on mortality by time, early, middle and late? As someone mentioned already, we need to find out relation between egg size and chick length because it may give us more opportunity to improve incubation technology.

Reply
Chen Zhi Xiang Chen Zhi Xiang
Assistant Manager
March 4, 2011
I noticed that your recommendation is to incubate chicken embryos at an eggshell temperature of 37.8ºC (=100F). Especially after 10 days of incubation when the embryos start to produce more and more heat.
In fact, however,I know that the eggshell temperature varies from 12 to 18 days. Not only 37.8ºC, sometime it is 37.9ºC or 38.0ºC
Could you please tell me which character can be choosed from 12 to 18 days?

Reply
Rose Molenaar Rose Molenaar
Research
March 7, 2011
Dear Chen Zhi Xiang,

Thank you for your question.

An average eggshell temperature of 37.8ºC is recommended from day 12 to 18 of incubation. You will always find differences in eggshell temperature among eggs on one incubator. As long as this is within the range of 37.5ºC to 38.0ºC, you can consider it as an optimal eggshell temperature that results in optimal chick quality.
Please be aware that we measure the temperature of the eggshell and not the temperature inside the incubator.

With kind regards,
Dr. Roos Molenaar M.Sc.


Reply
Chen Zhi Xiang Chen Zhi Xiang
Assistant Manager
March 24, 2011
First of all, thank you for your help- I am glad to discuss with you. I used to say "In fact, however,I know that the eggshell temperature varies from 12 to 18 days. Not only 37.8ºC, sometimes it is 37.9ºC or 38.0ºC ",
The average of the eggshell temperature varies from 12 to 18 days. Not only 37.8ºC, sometimes it is 37.9ºC or 38.3ºC. Every day is different, the higher the more later .for example,the average eggshell temperature is 38ºC on 15 day,but 38.2ºC on 17 day.
Could you please tell me which character can be choosed from 12 to 18 days? or Suitable scope?
Reply
Rose Molenaar Rose Molenaar
Research
April 5, 2011
Dear Chen Zhi Xiang,

If I read your response, it seems that your eggshell temperature increases with embryonic age. Our experience is that an optimal eggshell temperature is on average 37.8C (range 37.5 to 38.0C) until day 18 of incubation.
To achieve this in your incubator, you have to lower the temperature setpoint. It is dependent on your incubator design, season and for example flock age, what the actual temperature setpoint needs to be. You can measure the eggshell temperature after changing your settings to investigate if you achieved the average eggshell temperature of 37.8C.

Regards,
Roos Molenaar
Reply
Dr Muhammad Arshad  Manj Dr Muhammad Arshad Manj
Doctor of Veterinary Medicine
July 6, 2011
A o a . it seems an interesting finding, can we achieve these lengthy chicks throughout the flock age bcs at earlier days of production egg size is less. have u calculated the moisture loss of the egg at day 13.lengthy chick requirement for respiration will b higher than the normal size .will the lungs size support the chick size .will there not a problem of ascities ,a metabolic problem. i think , age of flock. age at maturity, strain,hathery management, will contribute to chick length. DEAR MR, ROOS, i m waiting for ur results. thanks regards
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