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额尔齐斯河白斑狗鱼寄生单肠四钩虫的种群生态学研究

, PP. 665-668

Keywords: 白斑狗鱼,单肠四钩虫,种群生态学,额尔齐斯河

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Abstract:

通过野外取样调查,对额尔齐斯河白斑狗鱼鳃部寄生的单肠四钩虫(Tetraonchusmonenteron)的种群生态学进行了研究。结果表明感染率、感染强度在不同的宿主体长组表现出不同的变化趋势,平均感染率为45.4%,而平均感染强度为11.8±6.05,随着宿主体长的增大,单肠四钩虫的感染率逐渐减小,而感染强度却逐渐增大;平均丰度和方差均比则随宿主体长的增大而出现先增大后减小的变化趋势,且方差均比(S/X)在不同的宿主体长组中均大于1,表明单肠四钩虫在宿主白斑狗鱼种群中均呈聚集分布,且聚集强度随着平均丰度的增加而增加。

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