Hasan Emad Almasri* ⁽¹⁾

(1). Dept. of Animal Production, Faculty of Agriculture, University of Aleppo.,

(*Corresponding author:   Hasan Emad Almasri. E-Mail, kaba.rami@gmail.com ).

Received: 21/05/ 2020        Accepted: 29/07/202

Abstract

This study was conducted on a flock of Awassi sheep in Aleppo Governorate – Al-Safira region-Syria, during the period of 2018/2019. It included 136 animals of Awassi sheep including (62 mothers and 74 lambs). The data were subjected to the General Linear Model, and a variance analysis was used to study the effect of the birth type, the sex of lamb on birth weight, weaning weight, and the daily weight gain from birth to weaning for lambs. The average birth weight, weaning weight, and average daily weight gain were 3.27 kg, 20.84 kg and 197.36 g/day, respectively. The results showed a highly significant effect of the birth type, the sex of lamb on the birth weight, weaning weight, and daily weight gain from birth to weaning, as the individual lambs outperformed the twins, and the males outperformed the females. A highly significant negative correlation was found between the type of birth and all studied factors, while it was not significant with the sex of lamb. The regression analysis showed that  both type of birth and the sex of lamb have significant effects on birth weight, weaning weight, and daily weight gain.

Key words: birth type, sex of lamb, birth weight, weaning.

Full paper in Arabic: PDF