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1 January 1993 VITAMIN E IN CRANES: REFERENCE RANGES AND NUTRIENT INTERACTIONS
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Abstract

Fat soluble vitamins E and A (quantified as α-tocopherol and all-trans retinol, respectively) were measured in plasma samples from 274 captive cranes from four institutions and five free-ranging birds. Ages ranged from 4 mo to 80 yr, and all 15 crane species were represented. Captive cranes had a mean ± standard error (SE) of 6.57 ± 0.82 μg/ml α-tocopherol; migrating greater sandhill cranes (Grus canadenis tabida) had a plasma concentration of 3.71 ± 0.22 μg/ml. Sex and age differences were not significant, but crane species that evolved in temperate habitats had higher circulating levels of α-tocopherol than tropical or subtropical species. Mean ± SE retinol values were 0.69 ± 0.05 μg/ml in captive cranes, and 0.66 ± 0.08 μg/ml in free-ranging cranes; values did not differ significantly by sex, age, or species. Dietary vitamin E concentrations were significantly correlated with plasma α-tocopherol levels in a logarithmic relationship. Dietary selenium at 0.5 mg/kg was associated with decreased circulating a-tocopherol concentrations.

Dierenfeld, Sheppard, Langenberg, Mirande, Spratt, and Dein: VITAMIN E IN CRANES: REFERENCE RANGES AND NUTRIENT INTERACTIONS
Ellen S. Dierenfeld, Christine D. Sheppard, Julie Langenberg, Claire Mirande, Jeff Spratt, and F. Joshua Dein "VITAMIN E IN CRANES: REFERENCE RANGES AND NUTRIENT INTERACTIONS," Journal of Wildlife Diseases 29(1), 98-102, (1 January 1993). https://doi.org/10.7589/0090-3558-29.1.98
Received: 8 January 1992; Published: 1 January 1993
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