Evaluation of UVB reduction by materials commonly used in reptile husbandry

Abstract

Ultraviolet B (UVB) irradiation (285-320 nm) is considered important for metabolic processes and reproduction in many reptile species by facilitating the synthesis of vitamin D(3). In captivity, UVB radiation reaching an animal may be diminished by the properties of the materials used in enclosure construction. We investigated the UVB-attenuating properties of 14 materials commonly used in cage tops for reptile enclosures. Irradiances were measured by two types of hand-held broadband radiometers and the D(3)-synthesizing potential was assessed by the use of an in vitro model. For UV-transmitting acrylic, a significant discrepancy between meter irradiances and in vitro model values for D(3)-synthesizing ability was observed, with meter readings underestimating the blocking effect. In contrast, attenuation of UVB irradiances by air-permeable materials, such as wire screen, measured with meters was generally comparable to the attenuation of D(3)-synthesizing ability as measured by in vitro models. Relatively simple meter readings can therefore be used to reflect reduction of D(3)-synthesizing ability through air-permeable materials. Zoo Biol 26:417-423, 2007. (c) 2007 Wiley-Liss, Inc.

The effects of sex, season, and natural sunlight on plasma vitamin D3 levels in two chelonian species (Testudo hermanni, Trachemys scripta) and their interaction with calcium, phosphate, and magnesium as associated plasma compounds

“…In central Europe, chelonians are often kept indoors or under glass or plastic to bridge the often too cold and wet early spring climate conditions right after hibernation. This impacts the availability of UV light as most glass and plastic will reduce the amount of UV light transmitted and many artificial light sources do not provide sufficient UVB-fractions in their spectrum (Burger et al, 2007;Sackey et al, 2015).…”

Leaf Gas Exchange and Damage of Mahogany and Pond Apple Trees from AdultDiaprepes abbreviatus(Coleoptera: Curculionidae) Feeding and Soil Flooding

“…There were a total of 12 cages, 6 infested and 6 non-infested (control). Cages were located in full sun but the aluminum screen blocked approximately 30% of incoming sunlight (Burger et al 2007).…”

UV irradiance effects on komodo dragon (Varanus komodoensis) vitamin D3, egg production, and behavior: A case study

“…Active vitamin D3 is needed in calcium metabolism and impacts immune system function and cellular regulation (Baines et al, 2016; Lamberg‐Allardt et al, 2013). Insufficient UV irradiance is linked to chronic stress, immunosuppression, metabolic bone disease, clinical lameness, and death (Adkins et al, 2003; Gardiner et al, 2009; Gillespie et al, 2000; Michael Burger et al, 2007). Too much UV irradiance can result in photo‐kerato‐conjunctivitis, which can result in death (Gardiner et al, 2009; Hibma, 2004).…”