Influence of birth weight and post partum age on lamb mortality in Ethiopian Horro sheep
| cg.contributor.affiliation | Ethiopian Society of Animal Production | |
| cg.coverage.country | Ethiopia | |
| cg.coverage.iso3166-alpha2 | ET | |
| cg.coverage.region | Africa | |
| cg.coverage.region | Eastern Africa | |
| cg.creator.identifier | Solomon Gizaw: 0000-0002-0600-7188 | |
| cg.place | Addis Ababa, Ethiopia | |
| cg.species.breed | HORRO | |
| cg.subject.ilri | SHEEP | |
| dc.contributor.author | Gojam, Y. | |
| dc.contributor.author | Gizaw, Solomon | |
| dc.contributor.author | Thwaites, C.J. | |
| dc.contributor.author | Awgichew, K. | |
| dc.date.accessioned | 2016-02-08T09:03:23Z | en |
| dc.date.available | 2016-02-08T09:03:23Z | en |
| dc.identifier.uri | https://hdl.handle.net/10568/70861 | |
| dc.title | Influence of birth weight and post partum age on lamb mortality in Ethiopian Horro sheep | en |
| dcterms.abstract | 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. | en |
| dcterms.accessRights | Limited Access | |
| dcterms.issued | 1995 | |
| dcterms.language | en | |
| dcterms.publisher | Ethiopian Society of Animal Production | |
| dcterms.subject | sheep | en |
| dcterms.subject | mortality | en |
| dcterms.subject | birth weight | en |
| dcterms.subject | age | en |
| dcterms.subject | perinatal period | en |
| dcterms.type | Conference Paper |