D. A. McWILLIAMS's scientific contributions
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Publications (2)
This review reports on a decade of nutrition research into calcium (Ca) homeostasis in freshwater turtles, including research on non-nutritive factors that are essential for Ca homeostasis [i.e. ontogeny, environmental temperature and humidity, and ultraviolet (UV) light and photoreception]. Recommendations for future research include long-term res...
This review presents information from a decade of nutrition research into calcium homeostasis in lizards, including non-nutritive factors essential to lizard nutrition; for example, ontogenetic dietary shift, microbial fermentation, environmental temperature, ultraviolet light and photoreception. Recommendations are made for possible nutrition rese...
Citations
... Low plasma calcium concentrations based on nutritional and environmental factors are the initial problem and hypocalcemia stimulates the release of PTH from the parathyroid glands resulting in bone resorption and reduced bone density. 154 Nutritional secondary hyperparathyroidism is the most common form of MBD in captive reptiles. 155 Although it varies between species, most lizards and chelonians are unable to obtain vitamin D solely from dietary sources. ...
Reference: Endocrine Diagnostics for Exotic Animals
... The Ca and P contents of the pellets and lyophilised beef heart were much lower than those of Gammarus and whole fish. Imbalanced diets having low Ca content lead to metabolic bone disease of nutritional origin in aquatic turtles as well (73). However, excess Ca intake (2.24% DM) may have a negative impact on the growth rate of aquatic turtles (74). ...
