ArticleAustralian veterinary journal2024
Peri-parturient ewe mortality in commercial, southern Australian, non-Merino ewe flocks: establishing the frequency and investigating causes.
Article in Australian veterinary journal, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Periparturient mortality in merino ewes in Australia: Incidence, impact and the path to mitigation strategies.Australian veterinary journal · 2025Review
- Maternal supplementation with melatonin during mid-pregnancy does not improve the survival of one-year-old ewes and their lambs.Journal of animal science · 2025Article
- Peri-parturient ewe mortality in commercial, southern Australian, non-Merino ewe flocks: establishing the frequency and investigating causes.Australian veterinary journal · 2024Article
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7 authors.
Funding
Abstract
backgroundThe level and cause of ewe mortality over the peri-parturient period is poorly understood in Australia. The purpose of this study was to determine the frequency of peri-parturient ewe mortality and investigate the causes of death in commercial, non-Merino ewes over the peri-parturient period.
methodsAn observational study involving 50 commercial, non-Merino farms across southern Australia during two lambing seasons was conducted. The study population was the breeding flock of ewes on each farm. Ewes were monitored by farmers from the time they were first placed in their lambing paddocks before lambing, up until lamb marking (the lambing period). The project required no change to normal practice. Veterinarians conducted postmortem (PM) examinations at three time points on each farm over the lambing period. A standard PM protocol was followed by all participating veterinarians.
resultsThe mean peri-parturient mortality over the lambing period was 2.5% in Year 1 and 2.0% in Year 2, with no significant difference between years. Factors that increased the risk of peri-parturient ewe mortality included ewe age (>5 years old) and litter size (triplet-bearing ewes). The most common causes of ewe death according to farmers was dystocia and unknown causes. The three most common diagnoses on veterinary PM examination were dystocia, septicaemia and trauma.
conclusionsThis study reveals the relative importance of each cause of ewe mortality over the peri-parturient period. Risk reduction could include identification and management of older ewes (aged above 5 years or older) and ewes carrying twins or triplets.
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