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Alpha-tocopherol in captive falcons: reference values and dietary impact.

Bianka Schink¹, Hafez M Hafez, Michael Lierz

¹Institute for Poultry Diseases, Free University of Berlin, 14163 Berlin, Germany.

Journal of Avian Medicine and Surgery

|August 12, 2008

Summary

Plasma alpha-tocopherol reference values in falcons were established. Dietary changes significantly impacted these levels, with turkey meat decreasing concentrations compared to chicks.

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Area of Science:

Avian medicine
Nutritional science
Veterinary diagnostics

Background:

Plasma alpha-tocopherol (vitamin E) is crucial for avian health.
Establishing species-specific reference ranges is vital for accurate diagnosis.
Dietary factors are suspected to influence vitamin E levels in captive birds.

Purpose of the Study:

Determine reference values for plasma alpha-tocopherol in falcons.
Investigate the impact of diet on plasma alpha-tocopherol concentrations.
Provide insights into nutritional management of captive falcons.

Main Methods:

Blood samples were collected from 29 captive breeding falcons.
Plasma alpha-tocopherol concentrations were analyzed using standardized methods.
A subset of 5 gyr-saker falcon hybrids experienced dietary manipulation (chicks vs. turkey meat).

Main Results:

Reference values for plasma alpha-tocopherol in falcons were determined as 16.7-46.1 mg/L (mean 27.5 +/- 8.7 mg/L).
Falcons fed 1-day-old chicks showed a mean concentration of 34.9 +/- 5.6 mg/L.
A diet of turkey breast meat significantly reduced plasma alpha-tocopherol to 13.1 +/- 2.6 mg/L.

Conclusions:

The study established reference plasma alpha-tocopherol values for falcons.
Diet composition significantly influences plasma alpha-tocopherol concentrations in falcons.
Nutritional strategies should consider dietary vitamin E content for optimal falcon health.