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用分段测量方法研究了黄鳝消化道各段的pH值变化情况。结果表明:黄鳝总感染率为90%,感染强度为13.64,平均密度为12.25;黄鳝消化道内胃,前中肠与后肠相互之间的pH值均存在极显著性差异(P<0.01);寄生虫(主要是棘头虫)多寄生在黄鳝前中肠内,棘头虫感染与未感染的黄鳝其前中肠的pH值也存在差异显著性(P<0.05)。
The pH value of each section of digestive tract of eel was studied by the method of piecewise measurement. The results showed that the total infection rate of eel was 90%, the infection intensity was 13.64 and the average density was 12.25. There was a significant difference (P <0.01) between the pH values of the stomach, the anterior intestine and the hindgut in the digestive tract of eel. Parasites (mainly spines) were parasitized in the middle intestine before the eel. There was also a significant difference (P <0.05) in the pH value of the former midgut between parasitized and uninfected eels.