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  #1  
Old 03-13-2013, 06:23 AM
Carryon Carryon is offline
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Help Me Decipher This. Australian Brush Turkey Sex Determination

I read this in Wikipedia, but don't get what it means.

Can some science guy/gal help me out.

From Wikipedia - Australian Bush Turkey:

Quote:
Like some reptiles, incubation temperature affects the sex ratio of chicks, however, the mechanism is different between reptiles and these birds, with reptiles exhibiting Temperature-dependent sex determination (TSD), and megapodes exhibiting temperature-dependent embryo mortality.
What? Are they killing the embryos of the sex they don't want?

From Wikipedia - TSD:

Quote:
It is most prevalent and common among amniote vertebrates that are classified under the reptile class,[2] but is absent among birds, including the Australian Brush-turkey, which was formerly thought to exhibit this phenomenon.
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  #2  
Old 03-13-2013, 06:35 AM
Princhester Princhester is offline
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It is saying that in reptiles, the sex ratio of the embryos changes depending on the incubation temperatutre. In other words, depending on the temperture, more or less embryos of a particular sex are produced. In the birds, the temperature does not skew the sex ratio, it skews the ratio of embryos that survive and those those don't.
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Old 03-13-2013, 06:46 AM
Smeghead Smeghead is offline
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Quote:
Originally Posted by Princhester View Post
It is saying that in reptiles, the sex ratio of the embryos changes depending on the incubation temperatutre. In other words, depending on the temperture, more or less embryos of a particular sex are produced. In the birds, the temperature does not skew the sex ratio, it skews the ratio of embryos that survive and those those don't.
I concur.
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Old 03-13-2013, 07:42 AM
Princhester Princhester is offline
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Hey I think I just set a new record for the most different misspellings of one particular word in a single post.
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Old 03-13-2013, 05:28 PM
Chronos Chronos is online now
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It's not a "they" that's killing the embryonic chicks; it's just the temperature. When the temperatures are too extreme one way, lots of boy chicks die, and when it's too extreme the other way, lots of girl chicks die.
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Old 03-14-2013, 02:34 AM
Leo Bloom Leo Bloom is online now
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Quote:
Originally Posted by Princhester View Post
Hey I think I just set a new record for the most different misspellings of one particular word in a single post.
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