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1、南海区养殖条石鲷的胚胎发育第5卷第4期2009年8月南方水产SouthChinaFisheriesScienceVo1.5.No.4Aug.,2009doi:10.3969/j.issn.1673—2227.2009.04.006南海区养殖条石鲷的胚胎发育蔡文超,区又君,李加儿(中国水产科学研究院水产种质资源与养殖技术重点开放实验室,中国水产科学研究院南海水产研究所,广东广州510300)摘要:在较高温度下对南海区养殖条石鲷(Oplegnathusfasciatus)的受精卵进行观察,详尽记录和描述了发育
2、时序和各发育时期的形态特征.条石鲷受精卵的卵径为0.860±0.023mm,油球径为0.1914-0.009mm.在孵化水温为25.64±0.77oC,盐度30～32的条件下,受精卵历时22h30min孵化出膜.初孵仔鱼(孵化后10～15min)体长为1.836±0.078mm.根据受精卵的发育过程,将其分为卵裂期,囊胚期,原肠期,胚孔关闭期,克氏泡期,尾芽期,心跳期,孵化前期和孵化期等9个时相.其中卵裂期,囊胚期和原肠期分别历时3h,3h和4h45min.对比不同温度下条石鲷的胚胎发育,认为原肠期,尾芽
3、期至孵化期这2个时期的发育速率受温度的影响最大.关键词:条石鲷;胚胎发育;受精卵;温度中图分类号:s917;$965.299文献标识码:A文章编号:1673—2227一(2009)04—0031—05EmbryonicdevelopmentofrockbreamOplegnathusfasciatusculturedinSouthChinaSeaCAIWenchao,OUYoujLIB,LIJiaer(KeyLab.ofFisheryGeneticResourcesandAquaculture,Chine
4、seAcademyofFisherySciences;SouthChinaSeaFisheriesResearchInstitute,ChineseAcademyofFisherySciences,Guangzhou510300,China)Abstract:Thispaperreportedtheemb~onicdevelopmentofrockbreamOplegnathnsfasciatuswhichwasculturedinSouthChinaSea,China.Eggswerefertilize
5、dandincubatedinabucketat25.64±0.77℃andsalinity30～32.Thediameteroffertilizedeggsandlipiddropswere0.860±0.023mmand0.191±0.009mm(Mean±SD),respectively.Twenty?twohoursand30minutesafterthefertili-zation,larvaewerehatched.Bodylengthofnewlyhatchedlarvae(age:0d)w
6、as1.836±0.078mm.Theembryonicdevelopmentschedulecouldbedividedintoninestageswhichwerecelldivisionstage,blastulastage,gastrulastage,blastoporeclosurestage,KupfferSvesicleformation,tail-budstage,heartbeatingstage,pre—hatchingstageandhatchingstage.Durationsof
7、divisionstage,blastulastageandgastrulastagewere3h,3hand4h45rain,respectively.Effectsofdifferentincubationtemperatureonembryonicdevelopmentwerediscussed.Itindicatedthatg~tmlastageandperiodfromtail-budstagetohatchingstagewereclearlyinfluencedbyincubationtem
8、perature.Keywords:rockbream(Oplegnathusfasciatus);embryonicdevelopment;fertilizedeggs;temperature条石鲷(Oplegnathusfasciatus)是一种暖温性海洋中下层鱼类,多栖息在温带,亚热带岩礁海区,主要分布于中国黄海,东海,台湾地区沿海,韩国,日本至夏威夷等海域.该鱼具有肉质鲜美,收稿日期:2008.1l一14;修回日期:2
