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PostPosted: Wed Nov 16, 2016 2:10 pm 
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Old Mother Goose
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http://www.independent.co.uk/news/a-dro ... 38516.html

note that this dates back to 1997.
If the findings were really significant I'm pretty sure it would have been implemented commercially by now.

Or has it?


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PostPosted: Wed Nov 16, 2016 3:14 pm 
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Golden Swan
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I am pretty sure I have read that temp can change the hatch rates - skewing towards males if the temp is a bit high - but not the other way around. The males are apparently a bit more robust in the shell. But the sex is determined, as in humans when fertilisation occurs. But I have not heard of what that article is saying. Maybe it was not correct or not repeatable? Not sure. But would be good if it DID work!

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PostPosted: Wed Nov 16, 2016 5:38 pm 
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Fiesty Fowl
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I think its natures way for the boys to be tougher as they tend to be preyed on more due to be more brightly coloured therefore the ratio of male to female offspring is also higher. It has been documented for Suberb Parrots, Hooded Parrots and Guildian finches that the ratio is 4 to 1. I do seem to always breed more male Guildian finches :aaah!
So i would expect as roos are brightly coloured they to would be more preyed on then hens.


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PostPosted: Wed Nov 16, 2016 9:54 pm 
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Golden Swan
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That makes sense, mycoola

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PostPosted: Thu Nov 17, 2016 11:05 am 
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Gallant Game
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Obviously my recent eggs have been chilled last generation because what I am getting now are mostly males!! :laughing


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PostPosted: Thu Nov 17, 2016 1:15 pm 
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Old Mother Goose
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I was coming to the same conclusion :brd2 :brd2 :brd2 :brd2 :brd2


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