Effect of live weight and age of Akkaraman ewes at mating on multiple birth rate, growth traits, and survival rate of lambs

The effect of ewe body condition at lambing on growth of lambs and colostral specific gravity

“…However, male lambs were heavier than female lambs between 60 and 120 days. Idris et al (2011) and Aktaş and Dogan (2014) reported that male lambs were heavier than females from birth to 120 days of age (P < 0.05, P < 0.001, respectively). However, Sarı et al (2013) indicated that sex had no significant effect on lamb live weights between birth and 180 days of age.…”

“…Some studies have also determined the insignificant effect of age of dam on birth weight and live weight of lambs at different ages (Aliyari et al, 2012;Aktaş and Dogan, 2014).…”

Effects of ewe live weight and age on reproductive performance, lamb growth, and survival in Central Anatolian Merino sheep

“…Sheep live weights (LWs) and age along with nutrition, weather, and season, have been reported to influence reproductive performance (Ray and Smith, 1966;Dickerson and Glimp, 1975;Gaskins et al, 2005;Akhtar et al, 2012). Increasing the premating weight and age of ewes could increase the pregnancy rate and multiple births (Molina et al, 1994;Gordon, 1997;Demirel et al, 2004;Thomson et al, 2004;Vatankhah and Salehi, 2010;Aliyari et al, 2012;Aktaş and Dogan, 2014). The effect of ewe LW was reported to be greater than the effect of premating ewe age on the ewe reproduction efficiency (Ray and Smith, 1966;Gaskins et al, 2005;Aliyari et al, 2012;Aktaş and Dogan, 2014).…”

“…Increasing the premating weight and age of ewes could increase the pregnancy rate and multiple births (Molina et al, 1994;Gordon, 1997;Demirel et al, 2004;Thomson et al, 2004;Vatankhah and Salehi, 2010;Aliyari et al, 2012;Aktaş and Dogan, 2014). The effect of ewe LW was reported to be greater than the effect of premating ewe age on the ewe reproduction efficiency (Ray and Smith, 1966;Gaskins et al, 2005;Aliyari et al, 2012;Aktaş and Dogan, 2014). Lamb survivability is also a very important subject in highly prolific sheep herds (Kott, 2014).…”

“…The breed, size, and age of a ewe, the birth type, lamb's sex, as well as maintenance and feeding conditions are known to have an important impact on the BW and weaning weight (WW) of lambs (Dickerson and Glimp, 1975;Gaskins et al, 2005;Notter et al, 2005;Aliyari et al, 2012;Aktaş and Dogan, 2014). An increase in the premating weights of the ewes has resulted in a proportional increase in the BW and WW of the lambs (Ray and Smith, 1966;Gaskins et al, 2005;Aliyari et al, 2012;Aktaş and Dogan, 2014).…”