洞庭湖区黄鳝体内鳗鲡独孤吸虫的流行病学调查  

Epidemiological Investigation of Azygia anguillae in the Host Monoqterus albus from Dongting Lake Region

作　　者：王文彬[1] 曾伯平[1] 罗玉双[1] 韩庆[1] 

机构地区：[1]湖南文理学院生命科学系,湖南常德415000

出　　处：《淡水渔业》2006年第6期36-39,共4页Freshwater Fisheries

基　　金：国家自然科学基金(No.30270229);湖南省自然基金项目(No.301JJY2030);湖南省教育厅科研项目(No.01C406)

摘　　要：2002年7—8月份，对洞庭湖区6个采样点鳗鲡独孤吸虫（Azygia Anguillae）对黄鳝（Monopterus albus）的感染情况进行了调查。结果显示，6个采样点的鳗鲡独孤吸虫对黄鳝的感染存在较大差异。感染率以华容点的最高（51．7％），津市点次之（46．7％），其余4个采样点的感染率都较低（20％以下）；感染强度也一样，华容点的最高，为4．7，津市点次之，为3．1，不同采样点的感染强度之间不存在显著性差异（P〉0．05）。2002年6月至2003年5月对常德采样点周年取样调查，发现在6、7、9月和翌年1、4、5月黄鳝感染有鳗鲡独孤吸虫，感染率在1．6％-18．4％间波动（以7月份最高），感染强度在1．0-17．0间变化（以4月份最高），其余月份无感染，全年总感染率为3．5％，平均感染强度为5．41。全部阳性宿主的体长频率呈正态分布，以30-35cm体长段的阳性宿主最多，占37．7％。不同地域环境、不同月份之间的感染差异性，与水域环境的稳定程度和作为中间宿主的食饵动物（多种小型鱼类）数量分布的均一性，以及鳗鲡独孤吸虫的生活史及黄鳝的习性等因素相关。In July and August, 2002, the infection difference of the rice-field eel Monopterus albus by Azygia anguillae from six localities of Dongting Lake region was reported. The prevalence was high in Huarong and Jinshi, which was 51.7% and 46.7% respectively; and it was all less than 20% in another four localities. The greatest intensity [4. 7（ 1 - 33） ] occured in Huarong, and Jinshi came the second 13.1 （ 1 - 11 ） ]. Intensity difference among six localities were not significant（P 〉0. 05）. In Changde, the overall prevalence and mean intensity from June 2002 to May 2003 were 3.5% and 5.41（ 1 - 79） respectively. There was infection in June, July, September and January, April, May of the next year, the prevalence was 1.6% - 18.4% （highest in July）, and mean intensity was 1.0 - 17. 0 （ greatest in April） ; there were no infection in other months. The frequency distribution of the positive host was the normal distribution, the positive rate of host among 30 - 35cm body length was the highest（ 37.7% ）. The infection difference in different localities and different months was related to the stability of water environment and regular distribution of the middle host（ small-sized fishes）and life cycle of Azygia anguillae and habits of the rice-field eel etc.

关 键 词：鳗鲡独孤吸虫(Azygia anguilla) 黄鳝(Monopterus albus) 洞庭湖区 感染率 感染强度 

分 类 号：S941.5[农业科学—水产养殖]