母親の遺伝は子羊の生存率に影響するか？

In this article, we considered the influence of genetics on lamb survivability, drawing from a research paper by Nuffield scholar Mathew Ipsen in 2013.

Ipsen has focused his study on how poor lamb survival is affecting low reproductive efficiency within the Australian sheep flock. The estimated loss of perinatal lamb loss to the industry is $56 million. Ipsen stated that his objective for the research:

A Nuffield scholarship investigating the world’s best practice in lamb survival, particularly in the first three days of life, appeared a natural fit and I hope to improve profitability for my own farm, my business clients, and the industry.

Recommendations made by Ipsen include:

• Select rams on ASBVs for total weaning weight
• Identifying and retaining the best performing uses and removing the worst performed (selection intensity)
• Management through pregnancy and post-lambing are encouraged.

Case studies provided give an insight into producers getting great results. In particular, a Romney stud in New Zealand has reduced lamb mortality to 7%.

While a silver bullet for improving lamb survival was not found, particularly in the crucial first three days, there are management and research results from around the world that can improve reproductive performance.