Factors influencing Awassi lambs survivorship under fields conditions
| Autor: | Anas Abdelqader, Rabie Irshaid, Abdur-Rahman Al-Fataftah, H. H. Titi, M. J. Tabbaa, M. Abuajamieh |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
medicine.medical_specialty
Lamb mortality General Veterinary 040301 veterinary sciences Birth weight Mortality rate Domestic sheep reproduction 0402 animal and dairy science 04 agricultural and veterinary sciences Biology 040201 dairy & animal science Surgery 0403 veterinary science Awassi Animal science Survivorship curve medicine Animal Science and Zoology Survival analysis Field conditions |
| Zdroj: | Livestock Science. 199:1-6 |
| ISSN: | 1871-1413 |
| DOI: | 10.1016/j.livsci.2017.03.007 |
| Popis: | The objective of this study was to investigate the pre-weaning survival rates of Awassi lambs and identify the causes of death in extensive and semi-extensive production systems. The study was designed to collect data under field conditions. Data were recorded on 29,290 lambs born alive during lambing seasons from 2011 to 2015. Postmortem autopsy findings were collected from 5448 lambs died during the pre-weaning period. About 63.5% of losses occurred during the first 7 days of life. The overall pre-weaning mortality rates were 19.7% and 16.9% in the extensive and semi-extensive production systems, respectively. Lamb birth weight had a strong effect (P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect