叶尔羌河流域斑重唇鱼寄生单式指环虫的空间分布  

Spatial distribution of Dactylogyrus simplex in Diptychus maculatus in the Yarkand River Basin,China

作　　者：容梦婕 郝翠兰[1] 张文润 喀迪尔丁·艾尔肯 穆妮热·喀迪尔 田胜利 冯龙基 岳城[1] RONG Mengjie;HAO Cuilan;ZHANG Wenrun;ARKEN Kadirdin;KADIR Munire;TIAN Shengli;FENG Longji;YUE Cheng(College of Veterinary Medicine,Xinjiang Agricultural University,Urumqi 830052,China)

机构地区：[1]新疆农业大学动物医学学院,新疆乌鲁木齐830052

出　　处：《中国水产科学》2021年第9期1220-1226,共7页Journal of Fishery Sciences of China

基　　金：国家自然科学基金项目(31860738,31960737);新疆维吾尔自治区研究生科研创新项目(XJ2020G167).

摘　　要：为了解单式指环虫在斑重唇鱼(Diptychus maculates)鳃部寄生的空间分布特点,于2019年5月至2020年6月对新疆叶尔羌河流域斑重唇鱼进行了3次取样调查,运用统计学方法对斑重唇鱼鳃部寄生单式指环虫(Dactylogyrus simplex)的感染情况及空间分布特点进行分析。结果显示,在检查的325尾斑重唇鱼中,共检出3994只单式指环虫,总感染率和平均感染丰度分别为67.7%和12.3±1.2;左鳃及右鳃的感染率分别为59.4%和57.2%,两者之间的感染丰度无显著差异(P>0.05);在各鳃片中,鳃Ⅰ(最靠近鳃盖的鳃片)、鳃Ⅱ的平均感染丰度显著高于鳃Ⅳ(P<0.01);单式指环虫随着宿主的生长,其感染率、感染丰度和强度先上升,后下降,在13~18 cm体长组达到最高,但是各体长组间的感染没有显著差异(P>0.05)。结果表明,单式指环虫对宿主左右鳃和年龄没有选择偏好性,但在鳃片分布上更偏好寄生于鳃Ⅰ和鳃Ⅱ,单式指环虫在宿主种群中的分布类型为聚集分布。An investigation was conducted to determine spatial distribution characteristics of the monogenean parasite Dactylogyrus simplex(Bychowsky,1936)on the gill filaments of the cyprinid freshwater fish Diptychus maculatus(Steindachner,1866)in the Yarkand River Basin,Xinjiang,from May 2019 to June 2020 through three sampling surveys.The infection and spatial distribution characteristics of D.simplex were analyzed using statistical methods.A total of 3994 D.simplex parasites were detected in 325 D.maculatus individuals,with a total infection rate of 67.7%and an average infection abundance of 12.3±1.2.The infection rates of the left and right gills were 59.4%and 57.2%,respectively,with no significant difference in infection abundance between them(P>0.05).For the gill slice,the average infection abundance of gill I(the gill slice closest to operculum)and gill II was significantly higher than that of gill IV(P<0.01).With the growth of the host,the infection rate,abundance,and intensity of D.simplex first increased and then decreased,reaching the highest values at 13<S≤18 cm body length;however,no significant difference in infection was detected among the body length groups(P>0.05).The results indicated that D.simplex had no preference for size,left and right gill,or age of the host,but preferred to parasitize gills I and II on the gill slices.The D.simplex population exhibited an aggregated distribution gills of the host.The findings of this study provide basic data for fish parasitic disease prevention and control in the Yarkand River Basin.

关 键 词：斑重唇鱼 单式指环虫 空间分布 感染状况 

分 类 号：S941[农业科学—水产养殖]