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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Michaels, C. J. Antwis, R. E. Preziosi, R. F. |
| Description | Country affiliation: United kingdom Author Affiliation: Michaels CJ ( Faculty of Life Sciences, University of Manchester, Manchester, UK.) |
| Abstract | Many amphibian species are dependent on ex situ conservation interventions for their long-term persistence. However, projects have been jeopardised by husbandry issues involving poor calcium metabolism and nutritional metabolic bone disease (NMBD). Healthy calcium metabolism requires appropriate dietary calcium content and access to vitamin D3 . In many animals, vitamin D3 can be photobiosynthesised in skin exposed to UVB radiation, as well as extracted from the diet, but the extent of vitamin D3 photobiosynthesis in amphibians is poorly known. Additionally, prey insects for captive amphibians are deficient in calcium and calcium content must be artificially increased, but the effects of different levels of augmentation and their interaction with UVB exposure are also little understood. We fed captive fire-bellied toads (Bombina orientalis) with crickets augmented to contain 5% and 10% calcium and housed them with and without UVB exposure. Despite additional dietary vitamin D3 supplementation, we found that toads exposed to UVB radiation exhibited significantly higher serum vitamin D3 levels, indicating that this species may partly rely on photobiosynthesis sources of vitamin D3 . These data are the first to show a direct link between UVB exposure and serum vitamin D3 in an amphibian. We found significant positive effects of UVB exposure and 10% dietary calcium content on skeletal structure, as well as complex interactions between treatments. We also found UVB radiation exposure resulted in more rapid natural coloration acquisition. Together, this indicates that standard calcium plus vitamin D3 supplementation methods may not fully substitute for UVB exposure and for increased feeder insect calcium content. This may have implications for the success of ex situ amphibian conservation, as well as for the welfare of captive amphibians in general. Our data lend support for the provision of UVB radiation for captive, basking amphibians. |
| File Format | HTM / HTML |
| ISSN | 09312439 |
| Issue Number | 2 |
| Volume Number | 99 |
| e-ISSN | 14390396 |
| Journal | Journal of Animal Physiology and Animal Nutrition |
| Language | English |
| Publisher | Wiley-Blackwell |
| Publisher Date | 2015-04-01 |
| Publisher Place | Germany |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Physiology Discipline Veterinary Medicine Discipline Nutritional Sciences Anura Physiology Bone Development Drug Effects Calcium, Dietary Pharmacology Cholecalciferol Blood Pigments, Biological Metabolism Ultraviolet Rays Animal Feed Animal Husbandry Animals Radiation Effects Biosynthesis Gryllidae Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Animal Science and Zoology Food Animals |
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