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1、魯東大學(xué)碩士學(xué)位論文扁玉螺繁殖和早期發(fā)育的研究姓名：劉慶申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：動(dòng)物學(xué)指導(dǎo)教師：孫振興20090607Abstract111eembryonicdevelopmentofthe∞aslugNevefitadidymawasobservedanddescribedatdifferenttemperature，brackishwatersalinityandPHgroupsandthemainfactorsaffecting

2、theveligerlarvareleasedwerealsoexaminedinartificialconditionsInordertoprovideexperimentalbasisformantlefromNeveriadidymawereculturedintheresearchThemainresultsshowed：l：ThegonaddevelopmentoftheNeveritadidymafromYantaiseaa

3、reawasobservedbyusingthetissuesliceandHEcolorationtechniqueAccordingtothehistologicalcharacterthegonaddevelopmentofNeveritadidymamaybedividedintothefollowingfivestages：proliferatingstage，growingstage，maturingstage，spawni

4、ngstageandrecoveringstageThereproductivecycleofNeveritad／dymaisonceayearintheYantaiseaareaThespawningseasonstartsfromtheearlyofMaytothemiddleofAugusttheirspawningpeal【isfromtheearlyofJunetotheendofJulyTheresearchresultsp

5、rovedthelawsofgonaddevelopmentsupplementeddataofreproductivebiologyofNeveritadidymaandhadactivesignificanceforexploitationandutilizationofNevefitadidyma2：ThereproductivehabitandreproductivecapacitywerestudiedinthispaperI

6、tsreproductiveperiodisfromearlyapirlTheupperopeningmeandiameteris368em，theendopeningmeandiameteris351cm，hi曲is232cm，theaverageeggblockweightis8349，Theindividualreproductivecapacityis84174—391245onaverage3：EggmassesofNever

7、itadidyma獅artificiallyhatchedatwatertemperature25426。Candbrackishwatersalinity32Basedonthemorphologicalchange，earlydevelopmentcanbedividedinto2stages：embryonicdevelopment(includingcleavage，blastulaandgastrula，eggtrochoph

8、oraandeggveliger)andlarvaldevelopment(includingIncubationstage，bigveligerandcreepinglarvae)4：ExperimentswerecardedoutinamarineculturefieldofShandongProvincefromApr2006toApr2007Undertheconditionsofcontrol!edseawatertemper

9、ature，salinity，fodderandpH，theinfluencesoftemperatureandsalinityonthegrowthandsurvivalofNeveritadidymaLarvaewerestudiedrespectivelyTheresultsshowedthatthesuitabletemperatureWas19～26Cforlarvae，suitablesalinityWas29“35forl

10、arvaeThegrowthwasthebestandthesurvivalrateWasthehighestatseawaterpHvaluefrom75to85，‘Chlorellasaeeharophila’and‘‘ChaetocerosmuelleriLemmermalm’isfitforfodderofthelarvaeofNeveritadidymaLarvaeKeywords：Neveritadidyma；sexgona

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