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OpenJournalofFisheriesResearch水产研究20152(3)31-41PublishedOnlineSeptember2015inHans.http://www.hanspub.org/journal/ojfrhttp://dx.doi.org/10.12677/ojfr.2015.23004APreliminaryAnalysisonPopulationViabilityforTriplophysavenustaXiangweiWu1GuanghuaLi2BaoliangBi1HongmanYu3LingfuKong1*YunLeng2*YuZhang4ZhiwuJiang41CollegeofAnimalScienceandTechnologyYunnanAgriculturalUniversityKunmingYunnan2YunnanAcademyofFisheriesScienceKunmingYunnan3CollegeofAgronomyandBiotechnologyYunnanAgriculturalUniversityKunmingYunnan4YunnanHuadianLudilaHydropowerCo.Ltd.KunmingYunnanEmail:xwwu@ynau.edu.cn*wzlklf@sina.com*lengyun871@126.comReceived:Aug.28th2015;accepted:Sep.27th2015;published:Sep.30th2015Copyright©2015byauthorsandHansPublishersInc.ThisworkislicensedundertheCreativeCommonsAttributionInternationalLicense(CCBY).http://creativecommons.org/licenses/by/4.0/AbstractTriplophysavenustaisoneoftheindigenousfishspeciesinYunnanprovince.AsoneofthemaincomponentsofthefishfaunainQinghai-TibetplateauandplayinganimportantroleinthestudyoffishevolutionithasbecomethemainprotectivefishinYunnanprovince.Howeveritspopula-tionhaddecreaseddramaticallyinrecentyearscausedbythehydropowerstationconstructedontheJinshaRiverandthecontinuousdroughtbeginningin2009inYunnanprovince.Thepopula-tionviabilityanalysesweremadebythevortexmodelandconsequentlythepopulationdynamicswithinthefollowing100yearswerealsopredictedinT.venusta.Ourresultssuggestedthatthepopu