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Royal jelly: can it reduce physiological strain of growing rabbits under Egyptian summer conditions?

Published online by Cambridge University Press:  05 May 2010

S. A. Elnagar ,
O. A. Elghalid  and
A. M. Abd-Elhady
S. A. Elnagar*
Affiliation:
Department of Poultry Production, Faculty of Agriculture, Alexandria University (21545), Alexandria, Egypt
O. A. Elghalid
Affiliation:
Department of Poultry Production, Faculty of Agriculture, Alexandria University (21545), Alexandria, Egypt
A. M. Abd-Elhady
Affiliation:
Department of Poultry Production, Faculty of Agriculture, Alexandria University (21545), Alexandria, Egypt
*
†E-mail: elnagar_samar@yahoo.com
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Abstract

Exposure of growing rabbits to heat stress during summer adversely affects their performance leading to major production losses. A total number of 48 rabbits, unsexed V-line weaned rabbits, were randomly divided into four experimental groups, temperature ranged from high at 32°C to low at 23°C. Animals of the 2nd, 3rd and 4th group were individually orally given 200, 400 or 800 mg royal jelly (RJ)/kg BW once a week, respectively, to evaluate RJ ability to reduce physiological strain resulted from heat stress. Weekly BW gain increased by 10.4, 11.8 and 10.8%, and feed conversion ratio was significantly improved by 20, 24 and 18% with RJ treatments. Serum total protein, albumin and globulin increased, whereas serum total lipids, cholesterol and triglycerides decreased with RJ treatments. Creatinine was reduced by 21, 30 and 18% and uric acid by 14, 25 and 18% compared with the heat stressed control with the three doses of RJ. Glucose level increased significantly to reach 116, 125, and 120% of heat stressed control. Calcium, phosphorus and alkaline phosphatase increased significantly with RJ treatments indicating the occurrence of active bone deposition. Thyroid hormone levels increased significantly to reach 108, 111, and 112% of heat stressed control rabbits with the three doses of RJ, counteracting the hypothyroid state resulted from heat stress. It can be concluded that RJ administration to heat stressed growing rabbits can reduce physiological strain resulted from heat stress.

Keywords

rabbitheat stressroyal jellyliver functionkidney function
Type
Full Paper
Information
animal , Volume 4 , Issue 9 , September 2010 , pp. 1547 - 1552
Copyright
Copyright © The Animal Consortium 2010

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