Temperature Sexing.

[Jonathan Helms]

Hi everyone, I have a question about temperature sexing. I know what temperature ranges produce male and female hatchlings (75F to 79F mainly males and 82F to 86F mainly females.) My question is, does any one know what week the temperature is decided? Chun this could be a question you could at to your list for Marguerite Whilden. Thanks Jonathan Scute Mod http://www.diamondbackterrapin.com

[Marguerite Whilden]

Jonathan Interesting question. I met a researcher from the University of Maryland Biotechnology Institute – Al Place. He has been investigating the point at which the sex is determined by analyzing changes in specific hormones. Eggs from terrapins and snapping turtles are incubated at specific temps and dissected at various frequencies. Al might know the point at which the sex is determined. He had a snapping turtle which apparently switched genders midway during incubation. I cannot remember how this happened. Check with Al at UMBI. Thanks for all your good work mw Marguerite WhildenTerrapin Institute http://www.terrapininstitute.orgP. O. Box 501Grasonville, Maryland 21638410 827 8055Field Station: 600 Discovery LaneGrasonville, MD 21638

[Dane Fagundes]

During the Symposium at State University,Dominguez Hills Carson, California 1998 one of the speakers stated that the middle third of the incubation period determines the individual’s gender along with temperature. The presenter: David Crews Department of Zoology University of Texas at Austin This symposium was an International Conference on Turtles & Tortoises 1998 Dane

[Diamondback Terrapin World]

Hi Dane, In a normal 60 day incubation do you know around which day(s) the middle of the third period is? Thanks Jonathan http://www.diamondbackterrapin.comDane Fagundes

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