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1、動(dòng)物學(xué)雜志ChineseJournalofZoology2008,43(5):13～24子陵櫛虎魚繁殖特性、胚胎及仔魚的發(fā)育3戚文華郭延蜀李雪芝郝彥哲(西華師范大學(xué)生命科學(xué)學(xué)院南充637009)摘要:子陵櫛虎魚(Ctenogobiusgiurinus)在嘉陵江中游南充段繁殖期在4～6月,產(chǎn)卵時(shí)間持續(xù)2～3h,每間隔1～2min交尾一次,每次交尾產(chǎn)卵30～50枚,累計(jì)產(chǎn)卵可達(dá)1000～1600枚。多數(shù)時(shí)間由雄性親魚負(fù)責(zé)孵卵,當(dāng)雄性親魚出巢攝食時(shí),由雌性親魚替代孵卵。成熟卵產(chǎn)出時(shí)為球形,卵徑0145
2、3～01644mm,具黏性,呈淡黃色,半透明,油球1～30個(gè),其中大油球1～4個(gè)。受精4min后吸水膨脹成橢圓形。根據(jù)其胚胎發(fā)育過程的形態(tài)特征,胚胎發(fā)育全程可劃分為7個(gè)階段:受精卵胚盤形成階段、卵裂階段、囊胚階段、原腸胚階段、神經(jīng)胚形成階段、器官形成階段和孵化出膜階段。在水溫2213～2517℃的條件下,胚胎發(fā)育共需109h52min。出膜前的器官分化程度高,胸鰭原基、鰓板、半規(guī)管、鰾、下頜及頜齒在出膜前均已存在,初孵仔魚全長21485～21640mm,體高01350～01460mm,初孵仔魚至
3、卵黃囊消失需要4d,至油球消失約6d。關(guān)鍵詞:子陵櫛虎魚;繁殖特性;胚胎及仔魚發(fā)育中圖分類號:Q954文獻(xiàn)標(biāo)識碼:A文章編號: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
