Bob Blosl's Heritage Large Fowl Thread

[catdaddyfro]

good day


too late for all this stuff for me

Jeff

 

[Matt1616]

I wasn't bashing you...just giving my take on that article. This subject has always stirred up many opinions. I also don't doubt that something like that message suggests could happen. If I have learned anything about breeding animals is just when you think you have them figured out they will surprise you. Mother Nature has a mind of its own sometimes....

Matt

 

[Outlier]

https://www.backyardchickens.com/t/656836/january-incubation-seminar-meetup-video

Incubation seminar by Dr. Keith Bramwell from the University of Arkansas speaking on breeding and incubation. He speaks at length regarding how long sperm cells remain viable within a hen. Research shows that it is about 21 days. However after about 14 days there tends to be increased embryonic death. He explains much more. Very good information.

 

[ronott1]

https://www.backyardchickens.com/t/656836/january-incubation-seminar-meetup-video

Incubation seminar by Dr. Keith Bramwell from the University of Arkansas speaking on breeding and incubation. He speaks at length regarding how long sperm cells remain viable within a hen. Research shows that it is about 21 days. However after about 14 days there tends to be increased embryonic death. He explains much more. Very good information.

Thank You!

That is an answer based on research.

 

[Yellow House Farm]

Can you post a study or two on this?

"After removal of the male, the average duration of fertility was found to be 10.7 days by Curtis and Lambert, 14.8 days by Nicolaides. The high records here are 29 and 32 days recorded by Nicolaides and Crew, respectively. In practice, poultrymen recognize that, a week after removal of the male, fertility is declining so rapidly that only special curcumstances warrant saving eggs longer than 12 or 14 days.

It is important to know how soon one male is replaced by another the influence of the first will be lost so that all or most of the fertile eggs can be attributed to the second sire [...] in such cases the influence of the first male is lost in 7 to 10 days and frequently in as little as 3 to 5 days. Furthermore, once the second male's sperm begin to fertilize eggs on any one hen, few of them, if any, are subsequently fertilized by the first male [...] it seems clear that 7 to 10 days are ample as an interim when one male replaces another" Hutt, F. B., The Genetics of the Fowl , pg 450.


In explaining how the author did tests at his university:


"Transfers of the males are arranged to accommodate weekly settings of eggs on Tuesday. To illustrate, Shift 1 goes out of the breeding pens on Friday afternoon and is replaced on Sunday in the late afternoon. Eggs laid on Monday night are credited to Shift 1, but eggs on Tuesday to Saturday, when paternity is doubtful, are marketed. Beginning on the following Sunday, eggs are saved for incubation and credited to Shift 2, this being 7 days after the introduction of these cockerels and nine days after the removal of Shift 1." (521).

 

[ronott1]

"After removal of the male, the average duration of fertility was found to be 10.7 days by Curtis and Lambert, 14.8 days by Nicolaides. The high records here are 29 and 32 days recorded by Nicolaides and Crew, respectively. In practice, poultrymen recognize that, a week after removal of the male, fertility is declining so rapidly that only special curcumstances warrant saving eggs longer than 12 or 14 days.

It is important to know how soon one male is replaced by another the influence of the first will be lost so that all or most of the fertile eggs can be attributed to the second sire [...] in such cases the influence of the first male is lost in 7 to 10 days and frequently in as little as 3 to 5 days. Furthermore, once the second male's sperm begin to fertilize eggs on any one hen, few of them, if any, are subsequently fertilized by the first male [...] it seems clear that 7 to 10 days are ample as an interim when one male replaces another" Hutt, F. B., The Genetics of the Fowl , pg 450.


In explaining how the author did tests at his university:


"Transfers of the males are arranged to accommodate weekly settings of eggs on Tuesday. To illustrate, Shift 1 goes out of the breeding pens on Friday afternoon and is replaced on Sunday in the late afternoon. Eggs laid on Monday night are credited to Shift 1, but eggs on Tuesday to Saturday, when paternity is doubtful, are marketed. Beginning on the following Sunday, eggs are saved for incubation and credited to Shift 2, this being 7 days after the introduction of these cockerels and nine days after the removal of Shift 1." (521).

This study combined with the one by Dr. Bramwell would suggest waiting 21 days to be sure you are not getting offspring from the old Rooster. They even had some up to 32 days. Those must have been very fertile males.

Like I posted earlier, I had this happen to me when the new rooster was in the pen for 14 days. The higher morbidity would explain why only 3 hatched out of 14 eggs--two looked like Ameraucana x SG Dorking and one looked like a pure SG Dorking.

 

[Texasmja]

https://www.backyardchickens.com/t/656836/january-incubation-seminar-meetup-video

Incubation seminar by Dr. Keith Bramwell from the University of Arkansas speaking on breeding and incubation. He speaks at length regarding how long sperm cells remain viable within a hen. Research shows that it is about 21 days. However after about 14 days there tends to be increased embryonic death. He explains much more. Very good information.

By Dr. Chris McDaniel, Associate Professor, Poultry Science Department, Mississippi State University

A hen will have maximum fertility for only about 3 to 4 days after one mating. For this reason, the male-to-female ratio in a flock must be enough to ensure mating of every hen every 3 days or so.

 

[lualshannon]

My NH babies are now 5 wks. old, and am amazed as to their fast growth. When I pick them up, can feel their surprising weight. Such delightful experience to have these lovely birds, and watch them develop.


















They have cadmium yellow legs which looks unreal in person.

 

[thedragonlady]

My NH babies are now 5 wks. old, and am amazed as to their fast growth. When I pick them up, can feel their surprising weight. Such delightful experience to have these lovely birds, and watch them develop.


















They have cadmium yellow legs which looks unreal in person.

Those youngsters are positively glowing with good health, Lual. Good job !

 

[fowlman01]

Those youngsters are positively glowing with good health, Lual. Good job !

Yes, she is spoiling them. LOL!

w.