Literaturdatenbank
Literaturdatenbank |
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Stone, M. D. (2009). Effects of season, sex, and age on the calcium physiology and bone dynamics of turtles. Unpublished thesis PhD, Oklahoma State University.
Added by: Admin (09 May 2010 16:31:09 UTC) |
| Resource type: Thesis/Dissertation BibTeX citation key: Stone2009a View all bibliographic details  |
Categories: General Keywords: Schildkröten = turtles + tortoises, Untersuchungsmethoden = examination method, Veterinärmedizin = veterinary medicine Creators: Stone Publisher: Oklahoma State University |
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| Abstract |
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Dual-energy x-ray absorptiometry (DXA) is a frequently used non-invasive method for the determination of bone density and body composition. Although the applicability for use in mammalian studies is well established, its use in other taxonomic groups has received little attention. We evaluated the accuracy of DXA in determining bone density and body composition in turtles. Although DXA estimates of body composition were different from those obtained through chemical analysis, we developed predictive equations that can compensate for differences in estimates. Our data indicate that DXA precisely estimates bone mineral content, soft tissue mass, and body mass. However, due to current limitations in DXA technology, it does not effectively distinguish fat from lean tissue mass in chelonians. DXA's poor ability to estimate lean/fat mass is likely due to the relatively broad distribution of bone in the body of turtles and could prevent its application to other organisms with similar body plans (e.g., armadillos ). Despite this limitation, DXA can effectively estimate bone mass and might be useful for studies of bone dynamics or in identifying metabolic bone disorders in turtles.
Added by: Admin |