"Continuous strong UVB irradiance, that a lizard cannot escape, can cause skin damage and eventually malignant tumors, so that is why a gradient is important. The lizard must be allowed the opportunity to regulate its exposure."

http://www.chameleonnews.com/interviewfer.html



UVB, Vitamin D3 and calcium usage...

I thought that it was too much vitamin D3 from supplements (not from UVB exposure) combined with too much calcium that caused organ calcification (and leads to gout) because the vitamin D3 production from sunlight/UVB exposure is self-limiting? ""Extra" UVB above the requirement for D3 production is of no benefit, since as we have seen, the photo-biosynthesis is a self-limiting process; when sufficient is made, additional ultraviolet light merely breaks down any excess formed."

http://www.uvguide.co.uk/uvinviv.htm



UV and panther chameleons...

"Females raised with long (12 hours/day), moderately low exposures produced viable eggs with a significantly higher percentage of hatching compared to those in other environments."

http://www.zoonews.ws/IZN/323/IZN-323.htm



"It has been demonstrated that UVA can influence agonistic, reproductive, and signaling behaviors in some species of lizards (Gehrmann, 1994A) as well as inhibit growth in female panther chameleons, Chamaeleo pardalis (Ferguson, et al., 1996)."

http://www.anapsid.org/gehrman2.html

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