introduction the longevity is normally defined as the length of its productive life in the flock, which is the amount of time an animal spends producing (1). longevity reflects the ability of ewe to avoid being culled for low production, low fertility, illness and influences the number and cost of replacements required to maintain the flock size. the benefit of increasing longevity are increase...

This study evaluated the reproductive and productivity of local Dorper crossbred ewes in a community-based management system. We analyzed data collected from 2013 to 2021, taking into account different factors such as dam-breed, location, type birth, season, year lambing. Lambing was observed all year-round, but majority (35%) occurred September, October, December. suggests that pasture availab...

The aim of this study was to assess the duration and frequency behavioral observations pregnant ewes as they approached lambing. An understanding changes before birth may provide opportunities for enhanced visual monitoring at critical stage in animal’s life. Behavioral 17 late pregnancy were recorded during two separate time periods, which 4 6 weeks lambing giving birth. It normal farm procedu...

this study was carried out at sakha animal production research station, during the period from oct., 2009 to sept., 2010. forty rahmani ewes were divided into three treatment groups: the 1st, 2nd and 3rd treatment groups were intramuscularly injected (day 0) with 1 ml gnrh analogue followed by an intramuscular injection with 0.7 ml pgf2α5 (g1), 6 (g2) or 7 (g3) days later. a second dose of 1 ml...

the ovine melatonin receptor 1a (mtnr1a) and aromatase (cyp19) genes were structurally characterized and the association between their variants and reproductive and growth traits was studied in kurdi sheep at kurdi sheep breeding station located in shirvan, iran. the genomic dna was extracted by guanidine thiocyanate-silica gel method. polymerase chain reaction was carried out to amplify 824 bp...

This study was conducted to identify the risk factors that are associated with neonatal mortality in lambs and kids in Jordan. The bacterial causes of mortality in lambs and kids were investigated. One hundred sheep and goat flocks were selected randomly from different areas of North Jordan at the beginning of the lambing season. The flocks were visited every other week to collect information a...