>>Has anyone here used the "no substrate" method (eggs sit on grid over water) for incubation of box turtle eggs? It is used successfully with so many other reptiles, I was wondering...
Good question-I suppose if a person used one of those very expensive zoo incubators where temp and humdity can be maintained within a few degrees and percentage points-they could try. I'll ask some zoo people I know. But I don't think it would be a viable option for the typical keeper to incubate box turtle eggs due to the egg's thin, flexible shells. They would lose a lot of moisture without the surrounding bedding to keep moisture close-in. The eggs that I have seen incubated without a medium are usually hard shelled and from arid species.
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Tess Cook
www.boxturtlesite.info