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1.
美国红鱼繁殖习性及诱导产卵技术初探   总被引:2,自引:0,他引:2  
美国红鱼(Sciaenops ocellatus)亦称眼斑拟石首鱼,属鲈形目,石首鱼科,拟石首鱼属。原产于美国大西洋沿岸及墨西哥湾。此鱼肉质鲜美,生长迅速,是美国、台湾等地重要的养殖鱼种。1991年7月由国家海洋局第一海洋研究所从美国引进,1995年9月自然性成熟、产卵,在我国首次育出第一代红鱼幼苗。1996年、1997年和1998年连续3a,通过控制红鱼的饲养水温和日光照周期,成功地使其在2~9月份保持连续产卵。关于美国红鱼的繁殖习性和诱导产卵技术的研究,目前国内尚未见报道。1 材料和方法1 …  相似文献   

2.
INTRODUCTIONThegenusTetraselmisStein ( 1 878)isagreenflagellates (Prasinophyceae)thatconsistsofmanymarineaswellasafewfreshwaterspecies .Marinespeciesoftenoccurindensepopula tionscausingbloomsintidepoolsorbays ,therebybeingimportanttoanunderstandingofthedynam…  相似文献   

3.
1 .IntroductionTheappraisalofagooddesignforaverylargefloatingstructure(VLFS)thatwillserveinaspeci fiedoceanarearequiresthatthestructuralsystembeeconomicallydesigned ,therequirementsforitsfunctionbesatisfiedandthestructurekeepsstableinitswholeserviceperio…  相似文献   

4.
INTRODUCTIONProvenanceofmarinesedimentshasalwaysbeenafocusedprobleminmarinesedimentge ology.Recognitionofendmembersandestimationoftheirrelativeproportionsfrommixedsedimentshavebeenakeycontentinthestudyofprovenance .Forthisaim ,itisnecessarytoselectendme…  相似文献   

5.
BasedontheNanshalslands,clttselatollconoeption-rentotesenaingsystetninPutI,throughthesolutionoftheitfotmationfunctionvalueandisostaticvalueofclaaxlandquasi-closalatoll,andbyusingtopologicalandysisongrowthformandthecompaiteremotesensingquantbationdataastheculatingcefficients,thefaturevevectorsystemanditsmathematicalmodeloftwokindsofatollarebuilt,andthemultivariateanalysisismadewithsomeexamples.  相似文献   

6.
INTRODUCTIONBecausesalinityisanessentialfactorinoceanographicstudies ,andanimportantparameterinsaltchemicalindustriesandmaricultureaswellasecosystem ,thesalinitydefinitionanditsmeasurementarebeingcontinuouslystudied .Researchershavebeenconstantlyworking…  相似文献   

7.
INTRODUCTIONTheradionuclidesofnaturaluraniumandthoriumseriescanbeusedtotracemarinepro cessofvarioustemporalandspatialscaleandpropertiesthatprovideplentifulinformationaboutphysics,chemistry ,geoscienceandbiologyofoceanbecausetheyhavedifferentchemicalpro…  相似文献   

8.
Outer frequency spectrum of sea waves and its equilibrium range   总被引:3,自引:0,他引:3  
Thepresentpaperdefinesthegeneralizedapparentenergydistributionandderivestheanalvticalformoftheso-calledgeneralizedouterfrequencyspectrumornthorderapparentfrequencyspectrum.Itisshownthatthegen-eralizedouterfrequencyspectrumhasanequilibriumrangewithanexponent(n+3)andtheupperlimitoftheex-ponentis-3.TheresultsofthispaperareuniversalandareapplicableforanyotherwavephenomenaiftheraytheoryofwavesandtheLonguet-Higgins,linearrandomwavemodelareexactenoughfortheirdescziption.  相似文献   

9.
High-resolutionsub-bottomprofilerhasrevededsedimentalstrataandentironmentsintheeuttmp.ofthel3ohaiSeasincetheltatePleistocene.Atccordingtothecharactersofacauseicreflectionandseismictstrattlgmphicprinci-ple,someclt.ificationoftypicalacousticreflectionisnzadeouttndwiUbefavourableforinterpretationandrecognbationofaoousticprofilesinthisarea  相似文献   

10.
1 .IntroductionLectotypeoptimizationofoffshoreplatformsisofparticularimportanceintheconceptdesignstagebecausenotonlyitdeterminestheoverallqualityoftheoffshoreplatformsystem ,andatthesametime ,themajoropportunitiesforcostsavingsoccurinthisoptimizationpro…  相似文献   

11.
NotesTheOceanDrillingProgram(ODP)mNowadays,withpopulationincreasingandnaturalresourcesforhumanbeingsdecreasing,scientistsmust...  相似文献   

12.
1 .IntroductionWhenatankerisberthedormooredtoanoceanplatform ,whichisusuallyinopenseas,thetankerwillsufferforcesgeneratedbywaves ,windandcurrent.Inmostofthepreviousstudies ,thein fluenceofcurrentorthecombinedwaveandcurrentwasconsideredtobethemainobject.Ins…  相似文献   

13.
Analysisofthedynamiccharacteristicsandstochasticsimulationonvariationsofbeachvolumes¥ChenZishen(InstituteofEstuarineandCoasta...  相似文献   

14.
Interfacial properties of oil spill dispersants and their effects on dispersion effectivenessInterfacialpropertiesofoilspilld...  相似文献   

15.
INTRODUCTIONThelargediametercylindricalstructureisoftenusedasthewharfandthebreakwaterstructureofharbor.Sinceittakessometimetofillmaterialintothecylinderafterthecylindershellissunkentotheseabed ,thestabilityofthecylinderbecomescontrolconditionforthesaf…  相似文献   

16.
1 .IntroductionTomeasurethereflectionofincidentwavesproducedbyaphysicalmodelinawaveflumeisacommonproblemwithphysicaltestsofwaveactiononcoastalstructures .Wavesgeneratedbythewave makerpropagateforwardinthewaveflumeandarereflectedbythephysicalmodel,andthe…  相似文献   

17.
BasedonthemorphocytologicalstudiesonPlanktoniella,twospeciesofthegenus,p.solSchuttandP.formosa(QianetWang)arerecordedinChina'sseas.TherenamingofthelatterspeciesisbasedonacarefulstudyonValdivielllaformosa(SchimperexKarsten)Karsten.  相似文献   

18.
INTRODUCTIONCryptomonasisunicellularbiflagellatewhichisacommongenusofCryptophyta .Thecellsareusuallystronglycompressedlaterally .ThereareoneortwolargeChloroplaststhatcontainchlorophylla ,c ,somecharacteristiccarotenoidsandphycobilinpigments (Huetal.,1 997;Wei…  相似文献   

19.
Chemistryofmarineresources-XIX.Themoleculedesignandsynthesisofcrow-linktypealkydresinanditsenrichmentbehaviourforpotassiumion...  相似文献   

20.
Theresearchontheremotesensing'sinformationtreemodeloftheNanshacoralisletsandreef'sspatialstructure¥LiuBaoyin;WangYanfengandHa...  相似文献   

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