Aug 1, 2021 · Ewe LW in first month of pregnancy and increased LW from first to third month had positive effects on lamb BW (Table 1). The optimum ewe BCS in third month of pregnancy, with respect to BW, is in the range 3.00–3.50 (Fig. 2) as both higher and lower BCS resulted in decreased BW due to the negative second degree coefficient. Ewe LW in third ...

Lambs born in summer exhibited lower productive performance, as evidenced by lower DWGBW (0.22 ± 0.08 kg), WW (18.88 ± 7.82 kg), and DWGW-150 (0.13 ± 0.07 kg). Ewes with prepartum BCS between 3 and 4 gave birth to heavier lambs.

The two age-at-first-joining groups were managed as one flock from approximately 16 months of age onwards. One of the main reasons often cited for not joining ewes to lamb at 1 year of age is the perception of a negative impact on BW when joining to lamb at 2 years of age.

Lamb BW was affected by maternal age and pregnancy rank: significant interactions were observed for time × age group (p < 0.0001) and for time × pregnancy rank (p = 0.04; Table 3). By 17 days, BW was similar between lambs born as single or multiple pregnancies.

Jul 23, 2021 · The aim of this study was to design statistical models for estimating lamb BW based on defined body measurements to provide a fast, easy, and accurate method for determining BW in management systems when the normal use of scales is limited.

The aim of this study was to evaluate the effects of colostrum source (goat or sheep) and timing of the first colostrum feeding (2 or 14h after birth) on lamb BW and immune status. In this study, 40 lambs were removed from their dams at birth and randomly assigned into 4 …

Jun 1, 2021 · Increasing ewe BW at joining increased the probability of rearing at least one lamb and this effect was consistent across genotypes. There was a positive relationship between ewe BW at lambing and lamb BW at birth whereas ewe BCS had a negative effect, likely reflecting variation in the partition of nutrients during pregnancy.

Estimating ewe lamb BW based on defined body measurements to provide a fast, easy, and more accurate in comparison with the traditional visual method for determining BW in production systems...

Lamb traits included BW at birth and approximately 45 d, 120 d (weaning), 12 mo, and 18 mo of age and fleece characteristics at 12 mo of age. Adult traits included ewe litter size; BW and BCS at weaning, in late gestation, and in early lactation; and adult fleece measurements.

Jan 1, 2025 · Data of Merino lambs from 1993 to 2002 of the Elsenburg Merino flock were assessed for birth weight (BW) and behaviour latencies (intervals in minutes), namely: from birth to first standing for > 10 sec (LTBS) as well as from standing to first suckling for > 10 sec (LTSS) in relation to a cold index (CI).