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1、PopulationQuantityInvestigation(Marked-RecaptureMethod)Name:Ramsey(ShiMu-xin)Number:2013210311011.InvestigationObjective(1)StudyandgrasptheutilizationofMarked-RecaptureMethod,anduseittorecordthenumberofcommunityfromthisexperiment.Graspthemethodofhowt
2、omarktheindividualcreatures.Learnthecalculatingmethod.(2)InvestigatethenumberofPseudorasboraParvaintheBUA’spoolwhichisnearbyrelationalarea.2.ResearchMethod(1)Definition:Captureapartofindividualsfromthispopulationwhichliveinthissurrounding.Markthispar
3、tofindividualsandletthemreturnthesurroundingstheylive.Aboutaperiodlater,recapturethispartofindividuals,calculatingthenumberofthispopulationunderliestheratioofoneindividualwhichoccupiestheoverallnumber.Thisisoneofthemethodswhichisoftenusedtoinvestigat
4、epopulationdensity.(2)StatisticalPrinciple:Underliesomecreaturewhichcanmoveflexibleinapointedareaandbeinvestigated.While,referringtheculturalindividuals’ratiorelationshiphasinfluenceonoverallnumberbymathematicsmethod.(3)TheoreticalCalculationFormula:
5、N=M*n/m(4)PremisesandAssumptions:Itwillgetstablefigures,markedindividualscandistributeamongtheoverallindividuals,re-markedoperationcannotimpactthebehavioranddeathofanimals.3OperationProcedure(1)Firstday,weselectedapoolwhichisnearbyrelationalareaandut
6、ilizedafishcagewhichiscontainedwithsomechickenbones.Wemadeourmindtocatch20PseudorasboraParva(Becauseithasstrongsurvivalcapabilityandithasactiveaction)andmarkit.Firstofall,wechosetheneedlefilledinktoinjectthefish,butwefounditistoughtooperate.Hence,weu
7、sedaclippertocutasmallpieceoffishes’tailonebyoneandletthemreturntothepool.Westillputsomechickenbonesinthecageandwaitedforaday.Fig.1ExperimentPlace(2)Adaylater,wereturnedbacktothepool,andwegot41(atleast40)PseudorasboraParvafromthecage,andweobservedwhe
8、therthefishes’tailiscutornotonebyonecautiously.Afterthatweletthemreturntothepool,becausetheyneedbealivetoo.Fig.2MarkedMethod(1)Afterobservation,wegot1fishwhichwascutfromthese41fish.Fig.3Re-markedFish(2)Aftercalculation,wegotN=8204.ErroranalysisandRes
