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                       ExperimentonsuitablehydrodynamicconditionsforhabitatactivityofAndrias
                                      davidianusandconstructionofsuitabilitycurve

                                                                                      3
                               1
                                              1
                                                                                                   1
                                                             1
                                                                         2
                      DINGYang,ZHAOJinyong,PENGWenqi,XIEYixing,YUZicheng,FUYicheng
                               (1.ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing 100038,China;
                            2.ZhangjiajieGiantsalamanderNationalNatureReserveAffairsCenter,Zhangjiajie 427400,China;
                       3.SchoolofWaterConservancyandHydroelectricPower,HebeiUniversityofEngineering,Handan 056038,China)
                  Abstract:InordertoexplorethesuitablehydrodynamicconditionsforthehabitatactivitiesofAndriasdavidianus
                  andcarryouteffectiveconservationmeasures,theeffectsofdifferentflowvelocityandbottomconditiononthehabi
                  tatactivitiesofAndriasdavidianuswerestudiedthroughoutdoorobservationexperiments.Thefuzzylogicalmethod
                  wasusedtocomprehensivelyanalyzeexperimentalparameterssuchasthetotaldailyresidencetime(DRT)andthe
                  dailyoccurrencetimesofAndriasdavidianusatdifferentflowvelocity ,andthesuitableflowvelocityconditionsand
                  thresholdsweredetermined.TheflowvelocitysuitabilitycurveofAndriasdavidianuswasconstructed ,andthe
                  channelindexsuitabilitycurveofAndriasdavidianuswasmadeaccordingtotheparametersoftotaldailyresidence
                  timeofAndriasdavidianuinareaswithdifferentsedime.TheresidencetimeoftheAndriasdavidianusatlowflow
                  rateaccountedfor69.13% ofthetotaltime ,andtheresidencetimeoftheAndriasdavidianusatmiddleandhigh
                  flowrateaccountedfor30.87% ofthetotaltime ,andthesuitableflowrateoftheAndriasdavidianuswasdeter
                  minedtobe0 - 0.5m?s(HSI>0.5,HSIwasthesuitabilityindex).Whentheflowvelocitywas0.1 - 3m?s,the
                  HSIwasinthepeakarea(HSI>0.8),andwhentheflowvelocitywasgreaterthan0.6m?s,thehabitatsuitability
                  graduallydecreased.Themostsuitablebottom materialtypesweregravel (8~16mm),pebble(16~250mm)
                  anddriftstone(>250mm),andwerenotsuitableforactivitiesintheareawheresand(0.062~2.0mm)wasrela
                  tivelylarge.
                  Keywords:Andriasdavidianus;observationalexperiments;flowvelocity;sediment;suitabilitycurve

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