台湾棘带吸虫尾蚴的实验生态研究
A STUDY OF THE EXPERIMENTAL ECOLOGY OF THE CERCARIAE OF CENTROCESTUS FORMOSANUS
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摘要: 1994年8-10月作者研究了台湾棘带吸虫尾蚴的实验生态,结果表明:光照对尾蚴的逸出有明显的促进作用,尾蚴具有强烈的趋光性;水温26-28℃时,其LD50的时间为40h左右,LD90的时间为52h左右,全部死亡时间为56-60h,死亡的尾蚴数随时间的关系符合逻辑斯谛方程;尾蚴不断地活动于水体的各个深度,但大部分时间仍停留于水体的底层;尾蚴的逸出数在适温范围内随水温的升高而增多,且尾蚴的活动强度随之增强;处于半数死亡时间的尾蚴仍然具有感染力,90%死亡时间的尾蚴失去活动,也失去了感染力,尾蚴经口被动感染淡水鱼类.Abstract: Experimental ecology of the cercariae of Centrocestus formosanus (Nishigori, 1924) was studied from August to October 1994.It was indicated that light illumination accelerated obviously the cercariae released, cercariae showed positively phototaxis.When water temperature was 26-28℃, the time of LD50, and LD90, was about 40 and 52 hours respectively, the cercariae fully died was 56-60 hours.The relationship of dead cercariae number and time was in keeping with the logistic equation N = 820.824/1 + e6.328-0.178t Cercariae moved about in the different height water continualy but often stayed on the' bottom.Cercariae showed positively thermotaxis, the release number and sport intensity varied positively with the suitable water temperature.Cercariae could infect the fishes with auccess at the time of LD50 but couldn't at the time of LD90 Cercariae were passively carried with the water current into the mouth cavity of the host freshwater fishes and brought about the infection in the gills.
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Keywords:
- Centrocestus formosanus /
- Cercariae /
- Experimental ecology
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[1] 李桂云.异形科棘带属台湾棘带吸虫( Centrocestus formosanus)形态及生活史的研究[A].中山医学院科学论文集[C],1961,(12):2096-2104[2] 吕军仪.倪氏复口吸虫和湖北复口吸虫生活史的研究,早期幼虫的实验生态[J].水生生物学报,1978,11(4):310-318[3] F.E.G珂克斯编.现代寄生虫学[M].北京:科学出版社,1987[4] 曾伯平,杨廷宝.吸虫的生活史及其蚴期对环境的适应[C].中山大学学报论丛生物学论文集(3),1995,1:157-161[5] 孙儒泳.动物生态学原理[M].北京:北京师范大学出版社,1987[6] Macy R W. The life cycle of Plagiorchis vespertilionis parorchis, n, sp., and observations on the effectsof light on the emergence of the cercaria [J]. J. Parasit., 1960, 46:337-345[7] Olivier L. J. The influence of the light on the emergence of Schistomatium douthitti cercariae from their snail hosts [J]. J. Parasit. 1951, 37:201-204 李桂云.异形科棘带属台湾棘带吸虫( Centrocestus formosanus)形态及生活史的研究[A].中山医学院科学论文集[C],1961,(12):2096-2104[2] 吕军仪.倪氏复口吸虫和湖北复口吸虫生活史的研究,早期幼虫的实验生态[J].水生生物学报,1978,11(4):310-318[3] F.E.G珂克斯编.现代寄生虫学[M].北京:科学出版社,1987[4] 曾伯平,杨廷宝.吸虫的生活史及其蚴期对环境的适应[C].中山大学学报论丛生物学论文集(3),1995,1:157-161[5] 孙儒泳.动物生态学原理[M].北京:北京师范大学出版社,1987[6] Macy R W. The life cycle of Plagiorchis vespertilionis parorchis, n, sp., and observations on the effectsof light on the emergence of the cercaria [J]. J. Parasit., 1960, 46:337-345[7] Olivier L. J. The influence of the light on the emergence of Schistomatium douthitti cercariae from their snail hosts [J]. J. Parasit. 1951, 37:201-204
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