滇池金线鲃对椭圆背角无齿蚌寄生效果的研究

滇池金线鲃(Sinocyclocheilus grahami)为云南滇池特有鱼类,选用滇池金线鲃作为椭圆背角无齿蚌(Anodonta woodiana elliptica)的寄生鱼,并对第1次和第2次寄生效果进行分析。结果表明,钩介幼虫主要寄生在鳍条(背鳍、胸鳍、腹鳍和尾鳍)以及鳃丝上,也有少量个体寄生在颌须、鼻瓣膜、鳃盖及体侧。每1尾滇池金线鲃的鳃内大约可寄生140个钩介幼虫。在整个鱼体上的平均寄生量为194个/尾,单位体长的寄生数量为28.6个/cm。二次寄生时,在寄生部位上没有变化,但在寄生数量上,除鳃丝上的寄生数量没有减少外,其它部位上的寄生数量均有显著的减少。本研究选用土著鱼类作为贝类的寄生性鱼类,为研究土著鱼类在贝类繁殖过程中所起到的作用及珍稀物种的保育提供了科学依据。

Infecting Efficiency of Anodonta woodiana elliptica on Sinocyclocheilus grahami

Sinocyclocheilus grahami grahami, an endemic fish of Lake Dianchi was selected as host fish for Anodonta woodiana ellliptica in this study. The effect of infection indicated that the average infecting juveniles 194 individuals per fish and the glochidian mainly infected in fish fins and gill. There are about 140 individuals infected in gill per fish. Compare the first effect of infection with second, there is not difference in infection position, but the number of infecting juvenile was decreased in second effect of infection except the gill.