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1、南方農(nóng)業(yè)學報JournalofSouthernAgriculture2016。47(5):742—747ISSN2095-1191;CODENNNXAABhttp://www.nfnyxb.cornDOI:10.39696:issn.2095—1191.2016.05.742條石鯛早期仔魚的形態(tài)發(fā)育觀察區(qū)又君1,李加兒1,謝菁-,一,何永亮l’2(1農(nóng)業(yè)部南海漁業(yè)資源開發(fā)利用重點實驗室/中國水產(chǎn)科學研究院南海水產(chǎn)研究所,廣州510300;2上海海洋大學水產(chǎn)與生命學院,上海201306)摘要:【目的】了解條石鯛早期生活階段的發(fā)育特征,豐富其發(fā)育生物學基礎資料庫
2、,也為判斷種苗生產(chǎn)工藝的培育效果與適時調整飼養(yǎng)管理措施提供技術支持?!痉椒ā坎捎贸R?guī)采樣方法和光學顯微鏡技術對條石鯛早期仔魚發(fā)育過程進行連續(xù)觀察,并對其營養(yǎng)特性進行研究。【結果】條石鯛在水溫(27.8±1.05)℃、pH8.15、鹽度32‰的人工培育條件下,仔魚卵黃囊在孵化2d后消失,油球消失于孵化后第6d,卵黃囊依照先卵黃、后油球的順序被吸收,吸收速度呈先快后慢的變化趨勢。初孵仔魚在孵化后1d內(nèi)生長迅速,之后生長速度減慢。仔魚在孵出后48h、卵黃囊消失時出現(xiàn)口裂,口徑/全長比隨時間變化一直保持上升趨勢。條石鯛仔魚的營養(yǎng)源可歸納為內(nèi)源性營養(yǎng)一混合性營養(yǎng)—外源
3、性營養(yǎng)3個階段,分別對應于孵化后2、3~4和5d?!窘Y論】條石鯛早期仔魚形態(tài)發(fā)育與其攝食習性的轉變相互適應。關鍵詞:條石鯛;卵黃囊期;仔魚;形態(tài)發(fā)育;營養(yǎng)源中圖分類號:$965.9文獻標志碼:A文章編號: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