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1、2007年7月重庆师范大学学报(自然科学版)Jul.2007第24卷第3期JournalofChongqingNormalUniversity(NaturalScienceEdition)Vol.24No.3三种鲫鱼外寄生车轮虫分类学及3异齿车轮虫致鳃组织病理学研究———重庆地区淡水车轮虫研究Ⅱ唐发辉,赵元莙(重庆师范大学重庆市动物生物学重点实验室,重庆400047)摘要:采用国际统一鉴定及描述车轮虫的方法对重庆部分地区的3种淡水车轮虫,即:杜氏车轮虫(TrichodinadomergueiWallengren,1897),显著车轮虫(TrichodinanobillisChen,1963)
2、及异齿车轮虫(TrichodinaheterodentataDuncan,1977)进行了较为详细的再描述。其中异齿车轮虫为中国新纪录种。对大量感染异齿车轮虫的鲫鱼鳃作了鳃组织的病理学研究表明,异齿车轮虫对鲫鱼的寄生虽未引起寄主明显的组织增生反应,但从患病鱼观察,可见粘液大量分泌,鳃小片愈合。粘液的异常分泌和鳃丝的缺损,不可避免地导致寄主鱼呼吸缺陷,从而影响了鳃组织的正常气体交换,严重时会导致寄主鱼窒息死亡。关键词:车轮虫;形态分类;鲫鱼;异齿车轮虫;组织病理++中图分类号:S941.514;Q959.468文献标识码:A文章编号:167226693(2007)0320008205Taxon
3、omicStudiesofThreeSpeciesofTrichodinaEhrenberg,1838withPathologicResearchintoGillTissueofCarassiusauratusCausedbyTrichodinaheterodentataDuncan,1977∶AStudyofTrichodinidsfromFreshwaterFishesinChongqingⅡTANGFa2hui,ZHAOYuan2jun(TheKeyLaboratoryofAnimalBiology,ChongqingNormalUniversity,Chongqing400047,C
4、hina)Abstract:RelativelydetailedredescriptionsofthreetrichodinindsoffreshwaterfishinChongqingaregiveninthepresentpa2perfollowingthewidespreadacceptanceoftheuniformspecificcharacteristicsproposedbyLom(1958)andthedescriptionofdenticleelementsfollowstheformatrecommendedbyVanAs&Basson(1989).Thethreespe
5、cies,subjecttoTrichodinaEhrenberg,1838,arepresentedbelow:Trichodinadomerguei(Wallengren,1897),TrichodinanobillisChen,1963andTri2chodinaheterodentataDuncan,1977.Ofthesethreespecies,TrichodinaheterodentataDuncan,1977isthefirstrecordedinChina.Atthesametime,gillsinfectedheavilybyT.heterodentataisfixeda
6、ndforfurtherpathologicresearch.Thehis2topathologicalresultrevealsthatcrucianheavilyinfectedbyT.heterodentataexhibitinganinflammatoryresponseofthegillwithsuperficialepitheliumbeingdeformedandalteredwhensomeectoparasitesarepresent.Numerousdesquamatedepitheli2alcellsandtissuedebrisfromthehost'ssurface
7、areregularlyobservedsurroundingtheciliates.Ciliatescanbealsoobservedunderlyingtheepithelialsurfacewithinthegillfilamentanddeathofhostswillbecausedforshortofoxygen.Keywords:Trichodinind;morphologictaxonomy;c
