Abstract:Charybdisjaponicaincludingclusteranalysis,principalcomponentanalysis,anddiscriminantanalysis.Fourwildpopulations,locatedinDalian,LaizhouBay,HaizhouBay,andXiangshanBay,weresurveyed.Thereweresignificantdifferencesbetweenmaleandfemalepopulations).ClusteranalysisrevealedthattheDalianstockwasmostcloselyrelatedtotheLaizhouBaystock,andthattheXiangshanBaystockwasmostdistantlyrelatedtotheLaizhouBaystock.Thecumulativevariancecontributionratio,intermsofthefiveprincipalcomponents,wasformalepopulations..TheaccuracyratewaslowestfortheDalianstock()andhighestfortheXiangshanstock(100%).Thetotalaccuracyrateofdiscriminantanalysesonmalepopulationswas).Alloftheanalysesindicatedthatthereweremorphologicaldifferencesamongthefourpopulationsof
