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绵羊胃肠道线虫寄生虫感染性幼虫在牧场上的空间分布。

Spatial distribution on pasture of infective larvae of the gastro-intestinal nematode parasites of sheep.

作者信息

Boag B, Topham P B, Webster R

出版信息

Int J Parasitol. 1989 Sep;19(6):681-5. doi: 10.1016/0020-7519(89)90047-7.

DOI:10.1016/0020-7519(89)90047-7
PMID:2807721
Abstract

The horizontal distributions of infective larvae on pasture grazed by sheep have been investigated. Using Taylor's Power Law it was found that larvae had a more aggregated distribution in September than August, the Law index of aggregation being 1.97 and 1.89 for the 2 months, respectively. However, at each time the degree of aggregation remained fairly constant for a range of spacings between points from 5 to 30 m. These results suggest that Taylor's Power Law could be used as a basis for devising an efficient pasture sampling strategy. More data are required, however, to determine the extent to which aggregation of the larvae varies with time of the year.

摘要

已对绵羊放牧草地上感染性幼虫的水平分布进行了调查。利用泰勒幂法则发现,9月幼虫的分布比8月更为聚集,这两个月的聚集度法则指数分别为1.97和1.89。然而,每次在5至30米的一系列点间距范围内,聚集程度保持相当恒定。这些结果表明,泰勒幂法则可作为设计有效牧场采样策略的基础。然而,需要更多数据来确定幼虫聚集程度随一年中时间变化的程度。

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