Influence of birth weight and post partum age on lamb mortality in Ethiopian Horro sheep
| dc.creator | Gojam, Y. | |
| dc.creator | Gizaw, Solomon | |
| dc.creator | Thwaites, C.J. | |
| dc.creator | Awgichew, K. | |
| dc.date | 1995 | |
| dc.date | 2016-02-08T09:03:23Z | |
| dc.date | 2016-02-08T09:03:23Z | |
| dc.date.accessioned | 2026-06-27T19:04:24Z | |
| dc.description | Mortality was studied in relation to birth weight (BWT) and postpartum age in 3083 Horro lambs born over 15 years at Bako Research Center, IAR. Pre-weaning mortality rose with declining BWT (log y = 2.20- 0.35X; r = 0.9981), but the influence after weaning was less pronounced and linear (y = 23.78-1.93X; r = 0.5271). Overall, 1066 (34.6%) of the lambs died; 19.1% of lambs born died before weaning and 19.1 % of lambs weaned died before one year of age. Significantly more lambs died in the first week of life (231/2953 = 7.8%) than in any subsequent 7-day period (0.2-1.9%, P<0.001). But, although significant (P<0.01), a transient rise in mortality after weaning was small in magnitude (mean: 1.6 VS. 1.1% lambs died per week). Major gains in meat output could be achieved from Horro sheep by reducing lamb mortality; firstly by improved late-pregnancy health and nutrition of ewes, and thus BWT, and secondly by attention to ewe and lamb management during the first week after lambing. | |
| dc.identifier | https://hdl.handle.net/10568/70861 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/170025 | |
| dc.language | en | |
| dc.publisher | Ethiopian Society of Animal Production | |
| dc.rights | Limited Access | |
| dc.subject | sheep | |
| dc.subject | mortality | |
| dc.subject | birth weight | |
| dc.subject | age | |
| dc.subject | perinatal period | |
| dc.title | Influence of birth weight and post partum age on lamb mortality in Ethiopian Horro sheep | |
| dc.type | Conference Paper |