Temperature Determines Gender
Posted by Shari Horowitz in Tropical Fish Hobbyist Blog on January 3, 2012 at 9:28 am
European sea bass were used for studies looking at the effect of temperature on gender determination in fish.
The environmental temperature has effects on sex determination. There are species, such as the Atlantic silverside fish, whose sex determination depends mainly on temperature. And there are other species whose sex determination is written within its DNA but still temperature can override this genetic ‘instruction’.
Previous studies with the European sea bass, a fish whose sex determination depends on a combination of genetic and environmental factors, had shown that starting with a normal sex ratio population -equal proportions of male and females, it was possible to obtain an all-male group just through an increase in water temperature during a critical period of early development.
Source: http://www.sciencedaily.com/releases/2011/12/111229203027.htm
Photograph by Imagine Images/Alastair Pidgen/Shutterstock
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