Plant J W, Marchant R, Mitchell T D, Giles J R
Aust Vet J. 1978 Sep;54(9):426-9. doi: 10.1111/j.1751-0813.1978.tb05568.x.
An investigation into causes of low lamb marking percentages was made on a property in north-west New South Wales from 1971 to 1975. Investigations revealed that from 11 to 70% of the ewes in lamb were losing all their lambs. Observations suggested that feral pig predation was a factor in the perinatal loss. In 1975, 2 groups of ewes were placed in adjoining paddocks prior to lambing. Feral pigs were excluded from one paddock for most of lambing by means of an electric fence. In this paddock, 117% of lambs were marked compared with 80% in the adjoining paddock. It was estimated that in 1975 over 600 lambs were killed by feral pigs from 1,422 ewes lambing in paddocks with feral pigs. The problems involved in the diagnosis of feral pig predation are discussed.
1971年至1975年期间，在新南威尔士州西北部的一处农场对羔羊成活率低的原因展开了调查。调查发现，怀有羔羊的母羊中有11%至70%会失去所有羔羊。观察结果表明，野猪捕食是围产期羔羊损失的一个因素。1975年，两组母羊在产羔前被安置在相邻的牧场。在产羔的大部分时间里，通过电围栏将一组牧场中的野猪排除在外。在这个牧场中，羔羊成活率为117%，而相邻牧场的成活率为80%。据估计，1975年在有野猪的牧场中，1422只产羔母羊所产的羔羊中有600多只被野猪咬死。文中讨论了野猪捕食诊断中涉及的问题。
