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1、动物学杂志ChineseJournalofZoology2008,43(5):13～24子陵栉虎鱼繁殖特性、胚胎及仔鱼的发育3戚文华郭延蜀李雪芝郝彦哲(西华师范大学生命科学学院南充637009)摘要:子陵栉虎鱼(Ctenogobiusgiurinus)在嘉陵江中游南充段繁殖期在4～6月,产卵时间持续2～3h,每间隔1～2min交尾一次,每次交尾产卵30～50枚,累计产卵可达1000～1600枚。多数时间由雄性亲鱼负责孵卵,当雄性亲鱼出巢摄食时,由雌性亲鱼替代孵卵。成熟卵产出时为球形,卵径0145
2、3～01644mm,具黏性,呈淡黄色,半透明,油球1～30个,其中大油球1～4个。受精4min后吸水膨胀成椭圆形。根据其胚胎发育过程的形态特征,胚胎发育全程可划分为7个阶段:受精卵胚盘形成阶段、卵裂阶段、囊胚阶段、原肠胚阶段、神经胚形成阶段、器官形成阶段和孵化出膜阶段。在水温2213～2517℃的条件下,胚胎发育共需109h52min。出膜前的器官分化程度高,胸鳍原基、鳃板、半规管、鳔、下颌及颌齿在出膜前均已存在,初孵仔鱼全长21485～21640mm,体高01350～01460mm,初孵仔鱼至
3、卵黄囊消失需要4d,至油球消失约6d。关键词:子陵栉虎鱼;繁殖特性;胚胎及仔鱼发育中图分类号:Q954文献标识码:A文章编号:025023263(2008)05213212ReproductiveCharacter,EmbryonicandLarvalDevelopmentofCtenogobiusgiurinus3QIWen2HuaGUOYan2ShuLIXue2ZhiHAOYan2Zhe(SchoolofLifeSciences,ChinaWestNormalUniversity,Nanch
4、ong637009,China)Abstract:CtenogobiusgiurinusisakindofsmallfreshwaterfishwhichpropagatesduringApril-JuneinthemiddlereachesofJialingjianginNanchong.Ithasaegg2layingperiodof2-3hours,onecopulationperintervalof1-2minutes,egg2layingnumberof30-50percopulati
5、on,andtotaleggnumberof1000-16001ThemaleC.giurinusisresponsibleforhatchingeggsinmostofthetime,andthefemalehatchestheeggstemporarilyonlywhenthemalegoesouttohuntingforfoods.Thefertilizedeggswerekeptinaglasscultureutensilduringtheobservation.Theresultsin
6、dicatethatthefertilizedandunfertilizedeggsofC.giurinushaveagroupofstickyfiberontheoneendwhichadherestothegravelaswellasotherhardmaterial.Theirfertilizedeggsarenearlysphericalinshapeandhaveadiameterof01453-01644mm,whicharelightyellow,translucentandver
7、yextensible.Thereare1-30oilglobulesineachegg,ofwhich1-4areobviouslybiggerinvolume.Theeggsbegintoinflateandbecomeellipsebyabsorbingwaterafter4minoffertilization.Accordingtothemorphologicalcharacteristics,theembryonicdevelopmentofC.giurinusmaybedivided
8、intosevenstages:thefertilizedeggandtheblastodermformationstage,thecleavagestage,theblastulastage,thegastrulastage,theneuralstage,theorganogenesisstage,andhatchingstage.Underthewatertemperatureof2213-2517℃,itrequires109h52minfortheembryonicdevelopment
