acanthocephalid
1. acanthocephalan worm
棘头虫
2. The frequency distribution of the acanthocephalan and the nematode was over-dispersed with parameter of negative binomial distribution of 0.2539 and 0.2176 respectively.
棘头虫和线虫的种群在黄鳝种群中均呈聚集分布,其负二项参数k值分别为0.2539和0.2176; 棘头虫和线虫的感染均以210~220 mm体长段的阳性宿主最多,分别占26.0%和34.6%。