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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2009 > Volume 8 Number 7 > Samar A. Elnagar and Ahmed M. Abd-Elhady

Exogenous Estradiol: Productive and Reproductive Performance and Physiological Profile of Japanese Quail Hens

Samar A. Elnagar and Ahmed M. Abd-Elhady
Department of Poultry Production, Faculty of Agriculture, Alexandria University, Egypt
Abstract :

Seventy two, 3 weeks old female quails were distributed among 2 treatments to study the effect
of estradiol administration, on their productive and reproductive performance. Birds of the first group were intramuscularly injected at 3 weeks of age daily with 100 ىg E /bird/day for 14 consecutive days. Birds of the 2 second group served as control. Birds injected with E from 3-5 weeks of age had a significantly higher body 2 weight at sexual maturity and matured significantly earlier compared to control. Egg number, egg weight and egg mass had significantly increased due to E injection. Ovaries and oviducts relative weight, oviducts 2 length, magnum length were none significantly increased while, shell gland length increased significantly by 17% due to estradiol injection. Serum calcium increased significantly due to E injections. This was also 2 accompanied with significant increase in Tibia weight (22%) and calcium content (10%) in compare to the untreated females. Estradiol injections resulted in a significant increase in egg shell percent and calcium content. Data indicated a stimulated pancreatic activity, as plasma glucose decreased while liver glycogen increased due to the treatment. Plasma total lipids, cholesterol and triglycerides levels were increased by 25, 20 and 22%, respectively. Similar trend was observed with liver lipids content, which was reflected on yolk lipids content. There were no significant differences observed on egg quality due to estradiol treatment. Serum transaminases (GOT and GPT) activities increased with E treatment while T decreased. It can be 2 3 concluded that treating immature Japanese quails daily (for 2 weeks) with E can enhance their reproductive 2 and productive functions without affecting their physiological profile or their egg quality.

Keywords :
Japanese quail hens, egg quality, liver, lipids content

Date Deposited : 06 Jul 2011 09:06

Last Modified : 06 Jul 2011 09:06

Official URL:

Volume 8, Number 7, - 2009 , ISSN 1682-8356

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