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Joined: Oct 2006
Posts: 325
A
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Interesting take on an odd fish.

Read the whole article: Time Magazine Article

"Once scientists began studying the impact of global warming on everything from tourism to asthma, it was only a matter of time before they got around to sex. Now two biologists at Spain's Higher Council for Scientific Research (CSIC) have done just that, at least when it comes to fish.

You may have missed it in biology class, but in some finned species, like the Atlantic silverside � as well as in many reptiles � sex is determined not by genetics but by temperature: the undifferentiated embryo develops testes or ovaries on the basis of whichever option conveys evolutionary advantages for that particular environment. Now, in a study published in the July 30 edition of the scientific journal Public Library of Science, Natalia Ospina-Alvarez and Francesc Piferrer have gone a little further in explaining how that mechanism works. In laboratory tests, they have demonstrated that higher water temperatures result in more male fish."

Read the whole article: Time Magazine Article


Last edited by AaronM; 07/31/08 08:39 PM.
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Aaron, when I click on the link above I get an error message.

I use to raise tortoises and with them temperature is a determining factor in the sex of the offspring.


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Aligators too, sex is determined by temperature as well which in turn is dependent on the depth that the eggs are buried.


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