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Gynandromorphous research results

 know your chicken

I recently discovered that 1 in every 10,000 chickens turns out to be gynandromorphous, half hen, half rooster, thanks to a recent BBC article.

Dr Michael Clinton of the Roslin Institute has just published some of the latest research on the subject in the scientific journal Nature.

They came up with a surprising conclusion. The system is different from mammals in that there is no mutation and the birds are full male on one side and full female on the other.

Of course the hope is to find a way to increase production in the poultry business by making female birds with the same growth characteristics as the male to "increase productivity and food security".



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This is what worries me with the increased interest in food security, and the backlash against killing unwanted male day-old chicks. Sooner or later some megacorp is going to genetically engineer "the perfect chicken" that matures fast (or lays well), has a predetermined gender, and thrives in cramped conditions.
Comment by Darren (Green Change) Sun Mar 14 19:05:15 2010
I hate to say it, but I think the brouhaha about the male day old chicks is a bit funny. What did people think happened to the male chicks? Don't they realize that there's a lot of killing involved in animal husbandry even if you're only looking to get eggs?
Comment by anna Sun Mar 14 21:15:14 2010

Personally, I think that intensive chicken farming is cruel and unsanitary. The fact that chickens on these farms are de-beaked lest they peck each other to death speaks volumes in that regard. Store-bought chicken is very often infested with E coli (between 40% and 99%, depending on the study) and samonella (up to 25%). Free range chickens have a much better life, provided you don't keep thousands. It seems that any large scale chicken farming can have disease and cannibalism problems.

Also, the feed conversion ratio of breeding chickens, while not as bad as cattle is still in the order of 2-4, which isn't very efficient. The ratio of edible proteins to feed proteins is about 1:3, also not very favorable.

Comment by Roland_Smith Mon Mar 15 15:57:02 2010

I think pigs are supposed to have the best feed conversion ratio.

I wouldn't be so sure that free range chickens were much better off --- although maybe the rules are different in Europe. Over here, "free range" could just mean that rather than being each in their little cage, the same number of birds are stuffed into a warehouse. Large scale meat operations are just inherently cruel and environmentally unfriendly.

Comment by anna Mon Mar 15 18:54:40 2010

The Wikipedia article on free range lists the EU regulations, which are quite good, I think.

AFAICT, the best food conversion ratio is found in fish (salmon/trout) close to 1. Pigs seems to be in the same range as chickens.

I've been wondering how efficiently we humans can metabolize vegetable proteins as opposed to animal proteins. Skipping a link of the chain and eating vegetable protein directly sounds more efficient to me. But that's the engineer in me talking. I haven't found any hard evidence yet.

Comment by Roland_Smith Mon Mar 15 19:21:31 2010

I thought I'd read good things about the EU's version of "free range." As usual, you've got us beat by a mile!

Most environmental writers will tell you that eating vegetable protein is much more land efficient than eating meat. On the other hand, I'm a big proponent of permaculture, which puts animals back into the ecosystem but at a more environmentally friendly level. Animals make sense on small, diversified farms since they add fertility to the soil. The trick is not to go overboard and eat meat twice a day, thus requiring CAFOs.

Comment by anna Mon Mar 15 19:35:32 2010

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