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Plasma concentrations of 25-hydroxycholecalciferol in 22 captive tortoises (Testudo species)

¹ Birch Heath Veterinary Clinic, Birch Heath Road, Tarporley, Cheshire CW6 9UU

The plasma concentration of 25-hydroxycholecalciferol was measured in 13 adult Hermann's tortoises (Testudo hermanni), seven adult spur-thighed tortoises (Testudo graeca) and two adult marginated tortoises (Testudo marginata) during 2004. They were healthy, of both sexes, and kept in captivity under natural unfiltered sunlight in southern England with no dietary sources of cholecalciferol. Blood samples were taken in March, June and August, and the concentration of 25-hydroxycholecalciferol did not vary significantly with the seasons. However, the concentrations in the female tortoises were always significantly lower than in the males.

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				K. Eatwell Comparison of total calcium, ionised calcium and albumin concentrations in the plasma of captive tortoises (Testudo species) Vet Rec., October 17, 2009; 165(16): 466 - 469. [Abstract] [Full Text] [PDF]