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ID:52218957
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页数:6页
时间:2020-03-25
《条石鲷早期仔鱼的形态发育观察.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、南方农业学报JournalofSouthernAgriculture2016。47(5):742—747ISSN2095-1191;CODENNNXAABhttp://www.nfnyxb.cornDOI:10.39696:issn.2095—1191.2016.05.742条石鲷早期仔鱼的形态发育观察区又君1,李加儿1,谢菁-,一,何永亮l’2(1农业部南海渔业资源开发利用重点实验室/中国水产科学研究院南海水产研究所,广州510300;2上海海洋大学水产与生命学院,上海201306)摘要:【目的】了解条石鲷早期生活阶段的发育特征,丰富其发育生物学基础资料库
2、,也为判断种苗生产工艺的培育效果与适时调整饲养管理措施提供技术支持。【方法】采用常规采样方法和光学显微镜技术对条石鲷早期仔鱼发育过程进行连续观察,并对其营养特性进行研究。【结果】条石鲷在水温(27.8±1.05)℃、pH8.15、盐度32‰的人工培育条件下,仔鱼卵黄囊在孵化2d后消失,油球消失于孵化后第6d,卵黄囊依照先卵黄、后油球的顺序被吸收,吸收速度呈先快后慢的变化趋势。初孵仔鱼在孵化后1d内生长迅速,之后生长速度减慢。仔鱼在孵出后48h、卵黄囊消失时出现口裂,口径/全长比随时间变化一直保持上升趋势。条石鲷仔鱼的营养源可归纳为内源性营养一混合性营养—外源
3、性营养3个阶段,分别对应于孵化后2、3~4和5d。【结论】条石鲷早期仔鱼形态发育与其摄食习性的转变相互适应。关键词:条石鲷;卵黄囊期;仔鱼;形态发育;营养源中图分类号:$965.9文献标志码:A文章编号:2095—1191(2016)05—0742—06Morphologicaldevelopmentofearly-stageOplegnh[husfasciatuslarvaeOUYou-junl,LIJia-erl,XIEJin91”,HEYong-lian91,2(IKeyLaboratoryofSouthChinaSeaFisheryResources
4、Exploitation&Utilization,MinistryofAgriculture/SouthChinaSeaFisheriesResearchInstitute,ChineseAcademyofFisheryScience,Guangzhou510300,China;2CollegeofFisheriesandLifeScience,ShanghaiOceanUniversity,Shanghai201306,China)Abstract:【Objective]Thepresentexperimentwasconductedtoinvestiga
5、tedevelopmentalcharacteristicsofopleg-natJlusfasciatusatearlylifestage,andenrichbasicdataofitsdevelopmentalbiology,inordertoprovidetechnicalsup-portforestimatingrearingeffectofO.fasciatusfriesandtimelyadjustingmanagementandmaintenancemeasures.【Method]Usingtraditionalsamplingandopti
6、calmicroscopetechniques,themorphologyofearly—stagelarvaewerecontin·uallyobserved。andtheirnutritioncharacterswerestudiedduringdevelopmentprocess.【ResultlTheresultsshowedthat,underartificialrearingconditionsofwatertemperature(27.8±1.05)℃,pH8.15andsalinity32‰,山eyolksacoflarvaedisappea
7、redon2dafterhatching,andtheoilglobuledisappearedon6dafterhatching.Theconsumptionsequenceofvolksacwasyolkfirstandoilglobulenext.Andtheconsumptionwasquickfirstandthensloweddown;Newly—hatchedlarvaegrewfastwithin1dafterhatching,andthenthegrowthratesloweddown.Furthernlore,themouthopened
8、whenyolksacdisappearedwith
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