| Autor: |
Gary W. Ferguson, William H. Gehrmann, Tai C. Chen, Michael F. Holick |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
Journal of Herpetological Medicine and Surgery. 15:9-13 |
| ISSN: |
1529-9651 |
| DOI: |
10.5818/1529-9651.15.4.9 |
| Popis: |
We have previously documented that chronic UVB exposure of female panther chameleons within a specified dose range is critical for hatching success of their eggs. We have also documented that the mechanism of this effect includes the enhancement of vitamin D3 production in the skin. Here we report that the mechanism for this effect includes enhancement of egg vitamin D3 content. Hatch success in this species can be predicted not only by UVB dose of the mother but by egg vitamin D levels above 65 ng/g at the beginning of incubation, although lower levels can sometimes be associated with hatch success. Vitamin D status of the mother (circulating 25-hydroxyvitamin D3; calcidiol) may also be useful to predict hatching success but our sample size was too small to determine a predictive linear or threshold effect. Finally, we document that egg vitamin D3 content is steadily reduced during the prolonged 260 d incubation period, so one must assay at the beginning of incubation or state when vitamin D3 is... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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