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Production responses in adult ewes to long-acting anthelmintic treatment pre-mating: relationship with body condition score
New Zealand Journal of Agricultural Research ( IF 1.8 ) Pub Date : 2020-08-09 , DOI: 10.1080/00288233.2020.1801770
Dave M. Leathwick 1 , Chris M. Miller 1 , Tania S. Waghorn 1 , Shen-Yan Hea 1 , Paul M. Candy 1
Affiliation  

ABSTRACT

A trial was conducted to investigate the response of mixed age ewes of different body condition scores (BCS) to a pre-mating treatment with long-acting anthelmintics. Three hundred Poll–Dorset Texel cross ewes were divided into three groups of 100 and treated pre-mating with either a 100-day controlled-release capsule containing abamectin, albendazole, selenium and cobalt, a long-acting injectable formulation of moxidectin or remained untreated. Initially, ewes of lower BCS showed a significantly larger response in liveweight gain and a BCS increase which approached significance. However, these benefits did not persist following the expiry of the anthelmintics. Although treated ewes gave birth to more lambs, by weaning there was no significant difference between treatment groups in any of the measured variables and no significant influence of ewe BCS at treatment. The results are similar to earlier studies which showed that the benefits measured at the end of a long-acting anthelmintic treatment may not persist and may over-estimate the true benefit. Although there was a temporary benefit to treatment of low BCS ewes the data in general supports the view that many factors contribute to low BCS in ewes and parasites are often only a minor contributor.



中文翻译:

成年母羊对交配前长效驱虫药的生产反应:与身体状况评分的关系

摘要

进行了一项试验,以调查不同体况评分 (BCS) 的混龄母羊对使用长效驱虫剂进行交配前处理的反应。将 300 只 Poll-Dorset Texel 杂交母羊分成三组,每组 100 只,在交配前用含有阿维菌素、阿苯达唑、硒和钴的 100 天控释胶囊(一种莫昔克丁的长效注射制剂)进行处理或保持未处理. 最初,BCS 较低的母羊在增重和 BCS 增加方面表现出显着更大的反应,接近显着性。然而,这些益处在驱虫药过期后并未持续存在。虽然经过治疗的母羊产下了更多的羔羊,断奶后,治疗组之间的任何测量变量均无显着差异,且母羊 BCS 在治疗时无显着影响。结果与早期研究相似,这些研究表明,在长效驱虫治疗结束时测量的益处可能不会持续存在,并且可能高估了真正的益处。尽管治疗低 BCS 母羊有暂时的好处,但数据总体上支持这样的观点,即许多因素导致母羊的低 BCS 和寄生虫通常只是次要因素。

更新日期:2020-08-09
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