Mortality of lambs at birth to weaning in nomadic flocks of Esfahan province

  • سال انتشار: 1392
  • محل انتشار: اولین کنفرانس بین المللی ایده های نو در کشاورزی
  • کد COI اختصاصی: NIAC01_330
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 563
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نویسندگان

m Aubi

Postgraduate student of animal science, Islamic Azad University of Khorasgan Branch.

s.n Tabatabaei

Assistant Professor of Animal Science, Islamic Azad University of Khorasgan Branch,and Agriculture and Natural Resource Research Center of Shahrekord.

f Zamani

Assistant Professor of Animal Science, Islamic Azad University of Khorasgan Branch,and Agriculture and Natural Resource Research Center of Shahrekord.

چکیده

The data used for this study were collected in 9 nomadic flocks (4 flocks Bakhtiari and 5 flocks Ghashghaei) in Esfahan province. Data collected on 900 lambs born alive in the different flocks were included in the analyses. Average pre-weaning mortality rate was 19% and ranged from 17.5% for Bakhtiari flocks to 20.4% for Ghashghaei flocks. Mortality rate in male lambs was higher than that recorded for female lambs (P< 0.05). When comparing the management systems followed from mating up until weaning in the different flocks with the corresponding pre-weaning mortality rates, it is obvious that there was discernible trend. Of the 171 lambs deaths recorded, the probable cause for 157(91.1%) deaths was known. The most important problems were health issues and disease, malnutrition, management and welfare. About 45.03% of pre-weaning mortalities was due health issues and disease. Birth weight and sex of the kid had a significant influence on pre-weaning mortality rate. Single-born kids had the lowest mortality rate, followed by twin-born and triplet-born lambs.

کلیدواژه ها

Lamb, Mortality , Bakhtiari, Ghashghaei, Nomadic

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