机构地区: 湘潭师范学院生命科学系生物系
出 处: 《湘潭师范学院学报(社会科学版)》 2000年第3期91-96,共6页
摘 要: :1998年 3月 -4月 ,通过对湖南境内湘江水系祁阳、衡阳、衡山、株洲和湘潭五个地点黄鳝体内新棘衣棘头虫的感染研究发现 ,黄鳝的感染率分别为 10 0 0 %、43 3 3 %、2 0 0 0 %、13 3 3 %、和 13 3 3 % ,感染强度分别为 2 3 3、2 0 0、2 5 0、8 5 0和 1 75 ,平均密度分别为0 2 3、0 87、0 5 0、1 13和 0 2 3 ;随着黄鳝的生长 ,其感染率、感染强度、平均密度呈上升的趋势 ;体长小于 9 0mm ( 2 0mm -12 0mm)的新棘衣棘头虫所占的比例分别为 85 71%、80 77%、86 66%、94 12 %、10 0 % ;新棘衣棘头虫主要寄生于黄鳝胃与肠交界处的结节 ,在黄鳝体内呈聚集分布 ,大量的新棘衣棘头虫寄生于少数黄鳝体内 ,多数黄鳝感染少量的新棘衣棘头虫 ; The present paper deals with the infection of Monopterus albus by pallisentis (Neosentis) celatus in Qiyang、 Hengyang、 Hengshan、 Zhuzhou、 Xiangtan in Hunan Province along the Xiang Jiang river The results indicated that the prevalence in the five sites was respectively 10 00%、 43 33%、20 00%、13 33%、13 33% The mean intensity was respectively 0 23、0 87、0 50、1 13、0 23, The prevalence, relative density and mean intensity of infection were positively correleted with the body length of the host Monopterus albus The longer the body length, the higher the prevalence, and vice versa When the body length of Pallisentis (Neosentis) celatus was less than 9 0mm (2 0-12 0mm), the percentage was respectively 85 71%、80 77%、86 66%、94 12%、100% Pallisentis (Ncosentis) celatus parasitized mostly in the middle part intenstine of Monopterus albus and showed aggregated distribution A large number of this parasite existed in a small number of this host while most hosts were infected with fewer parasites Pallisentis (Neosentis) celatus adapted it's life to parasitism