Plasma levels of vitamin D and some metabolites in marine mammals
Levels of vitamin D, 25-hydroxyvitamin D, 24,25-dihydroxyvitamin D, and calcium were determined in the plasma of various captive and wild pinniped and cetacean species. Vitamin D (< 0.4–5 ng∙mL −1 ) and 25-hydroxyvitamin D (4–84 ng∙mL −1 ) levels in the pinniped plasma were similar to those f...
| Published in: | Canadian Journal of Zoology |
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| Main Authors: | , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1988
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/z88-190 http://www.nrcresearchpress.com/doi/pdf/10.1139/z88-190 |
| Summary: | Levels of vitamin D, 25-hydroxyvitamin D, 24,25-dihydroxyvitamin D, and calcium were determined in the plasma of various captive and wild pinniped and cetacean species. Vitamin D (< 0.4–5 ng∙mL −1 ) and 25-hydroxyvitamin D (4–84 ng∙mL −1 ) levels in the pinniped plasma were similar to those found in nonmarine mammals. 24,25-Dihydroxyvitamin D levels in seals (3–48 ng∙mL −1 ) were high compared with those of other mammals, and the ratios of 24,25-dihydroxyvitamin D to 25-hydroxyvitamin D in fasting pups were extremely high. The belugas and bottlenosed dolphins had very high levels of both 25-hydroxyvitamin D and 24,25-dihydroxyvitamin D compared with the pinnipeds and other mammals, but plasma calcium levels were normal for these species of cetaceans. |
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