中文摘要：

2009年7月至2014年8月,对额尔齐斯河河鲈（Perca fluviatilis Linnaeus）进行采样调查,运用统计学方法分析河鲈眼睛寄生复口吸虫（Diplostomum）的空间分布特点。结果表明,在检查的253尾河鲈中,复口吸虫总感染率为51.38%,左右眼晶状体的感染率分别为11.86%和9.09%,左右房室液的感染率分别为40.32%和30.04%;方均比均大于1,表明复口吸虫种群呈聚集分布,且L房和R房聚集强度为50.63和34.97,高于L晶和R晶3.18和5.58;单因素方差分析各体长组复口吸虫感染数量,发现不同体长段在L晶和R晶差异不显著（P〉0.05）,在L房和R房差异显著（0.01≤P〈0.05,P〈0.01）。复口吸虫在晶状体和房室液的分布存在显著差异,对于晶状体和房室液有明显的选择性。

英文摘要：

Perca fluviatilis Linnaeus,one of the primary economic fish in the Ergis River,is high in protein and nutrient. Diplostomum,an eye fluke found in fish,is parasitizing the lens and vitreous humour of Perca fluviatilis. The obvious pathogenicity, discovered during this investigation,is severely impairing aquacultural development of P. fluviatilis. In this study the spatial distribution of Diplostomum in the eyes of P. fluviatilis Linnaeus was investigated with the goal of accumulating data for the continued study of Diplostomum and providing reference for disease prevention and healthy culture of P. fluviatilis. From July 2009 to June 2014,P. fluviatilis samples were randomly collected from the Ergis River at Beitun,Habahe,Bu＇erjin. The total length was measured and fish were placed into five groups according to the total length： L ≤10 cm,10 cm L ≤12. 5 cm,12. 5 cm L ≤15 cm,5 cm L≤18. 5 cm and L 18. 5 cm. The fish were sacrificed,eyes were removed and the lens and aqueous humour were inspected under an anatomical lens. Parasitic Diplostomum in the left and right lenses and aqueous humour were recorded and stored in 75% alcohol. The total prevalence of Diplostomum in the 253 individuals was 51. 38%. Prevalence in the left and right lens was 11. 86% and 9. 09%,respectively,and 40. 32% and 30. 04% in the left and right aqueous humour. The ratios of variance to mean exceeded 1,indicating that Diplostomum population exhibited an aggregative distribution in the host fish. The aggregation intensity in the left and right aqueous humour was50. 63 and 34. 97,much higher than those,3. 18 and 5. 58 in the left and right lens. One-way analysis of variance shows that the prevalence intensity of Diplostomum in the lens and aqueous humour of the different length groups was significantly different,with evident selectivity toward the aqueous humour. The prevalence rate of Diplostomum in the aqueous humour varied significantly with size. The highest prevalence rate（ 60. 0%） was in the group of10 cm L≤12. 5 cm,with p