Photobiosynthesis in Lizards: Opportunity, Ability and Behavioral Regulation

Ferguson, Gary W.; Carman, Elliott N.; Gehrmann, William H.; Holick, Michael F.; Chen, T.

doi:10.1007/978-1-4615-5051-8_18

Cited by 1 publication

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“…It is difficult to identify when it is time to change a lamp because the animal's requirements for UVB exposure and vitamin D are not known. Some reptiles are more efficient at vitamin D conversion and may only need minimal exposure to UVB [Ferguson et al, 1998, 2005]. Species characteristics that will affect synthesis include degree of skin pigmentation, total amount of skin that can be exposed to UVB, and the skin's concentration of 7‐dehydrocholesterol [Bernard et al, 1989].…”

Section: Discussionmentioning

confidence: 99%

Quantifying the vitamin D₃ synthesizing potential of UVB lamps at specific distances over time

et al. 2010

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The purpose of this study was to quantify the ultraviolet B (UVB) output and in vitro previtamin D(3) synthesis over time from various artificial light sources. Three incandescent lamps, T-Rex Active UVHeat 160 watt spot, T-Rex Active UVHeat 160 watt flood, and ZooMed PowerSun 160 watt flood, and two 1.2 m fluorescent lamps, Sylvania Blacklight 350 BL and ZooMed Reptisun 5.0, were studied. Total UVB irradiance and concentration of previtamin D synthesized using an in vitro ampoule model were quantified initially and at monthly intervals for 1 year. Incandescent lamps were measured at distances of 0.9 and 1.5 m while fluorescent lamps were measured at distances of 30.5 and 45.7 cm at the lamp's center, using both the radiometer and ampoules. Fluorescent lamp irradiance was also measured at the lamp's ends. Data were analyzed as a repeated measures split-plot in time using SAS with all mean differences determined using Least Squares Means. Incandescent lamp irradiance differences were seen at various distances. The UVHeat lamps had consistently higher previtamin D(3) production and irradiance readings compared with the PowerSun lamp. Reptisun 5.0 was consistently higher in UVB irradiance over Sylvania BL 350 at both 30.5 and 45.7 cm. However, there were no differences when comparing conversion of 7-dehydrocholesterol to previtamin D(3). Irradiance differences were detected between the centers and ends of the fluorescent lamps. Until UVB requirements for vitamin D(3) synthesis in animals are determined, it is impossible to state that one light is superior to another.

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Section: Discussionmentioning

confidence: 99%

Quantifying the vitamin D₃ synthesizing potential of UVB lamps at specific distances over time

et al. 2010

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Photobiosynthesis in Lizards: Opportunity, Ability and Behavioral Regulation

Cited by 1 publication

References 8 publications

Quantifying the vitamin D₃ synthesizing potential of UVB lamps at specific distances over time

Quantifying the vitamin D₃ synthesizing potential of UVB lamps at specific distances over time

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Photobiosynthesis in Lizards: Opportunity, Ability and Behavioral Regulation

Cited by 1 publication

References 8 publications

Quantifying the vitamin D3 synthesizing potential of UVB lamps at specific distances over time

Quantifying the vitamin D3 synthesizing potential of UVB lamps at specific distances over time

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Quantifying the vitamin D₃ synthesizing potential of UVB lamps at specific distances over time

Quantifying the vitamin D₃ synthesizing potential of UVB lamps at specific distances over time