ExtinctionofChinesepaddlefishandwildYangtzesturgeonannouncedb yIUCN世界自然保护联盟正式宣布白鲟灭绝,长江鲟野外灭绝TheInternationalUnionforConserv ationofNatureandNaturalResources(IUCN)announcedtheextinc tionoftheChinesepaddlefishandthewildYangtzesturgeononT hursdayinitsupdatedRedListofthreatenedspecies.周四,世界自然保护联盟 在其最新的濒危物种红色名录中宣布白鲟灭绝,长江鲟野外灭绝。Theglobalsturgeonreassessmentpub lishedbytheIUCNonThursdayrevealedthat100percentofthew orld''sremaining26sturgeonspeciesarenowatriskofextinctio n,upfrom85percentin2009.世界自然保护联盟周四发布的全球鲟鱼再评估报告显示,全球现存的26种鲟鱼 均面临灭绝威胁,而2009年的这一比例为85%。Thereassessmenthasalsoconfirmedthee xtinctionoftheChinesepaddlefish(Psephurusgladius)andthat theYangtzeSturgeon(Acipenserdabryanus)hasmoved,fromcritic allyendangered,toextinctinthewild.再评估还证实了白鲟的灭绝以及长江鲟从极度濒危到野外 灭绝。Additionally,17speciesarenowcriticallyendangered,three areendangeredandfivearevulnerableontheIUCNRedList.此外,在世 界自然保护联盟红色名录上,还有17个鲟鱼物种处于极度濒危状态,3个处于濒危,5个处于易危。Accordingtotherea ssessment,sturgeonshavebeenoverfishedfortheirmeatandcavi arforcenturies.Therefore,strongerenforcementofregulations againsttheillegalsaleofsturgeonmeatandcaviariscritical tostopfurtherdeclines.Besides,damsaffectallsturgeonspeci esmigratingtotheirbreedinggrounds,whileriverswarmingdue toclimatechangefurtherdisruptssturgeonreproduction.根据再评估报告, 几个世纪以来,人们为了食用鲟鱼肉和鱼子酱而对鲟鱼进行过度捕捞。因此,加强对非法销售鲟鱼肉和鱼子酱的监管是阻止鲟鱼数量进一步下降的关 键。此外,水坝也会影响所有洄游至繁殖地的鲟鱼物种,而气候变化导致的河流变暖也会进一步影响鲟鱼的繁殖。Therestoration offreshwaterecosystemsandbuildingeffectivefishpassages,t ogetherwithrestocking,arekeymeasurestosupportthelong-ter msurvivaloftheworld''ssturgeons.恢复淡水生态系统、建立有效的鱼类通道以及补充鱼类资源,是支 持全球鲟鱼长期生存的关键措施。BothChinesepaddlefishandYangtzeSturgeonarer epresentativeaquaticspeciesoftheYangtzeRiverBasin.TheChi nesepaddlefishisoneoftheworld''slargestfreshwaterfishspe cieswithalengthofupto7meters.ItisendemictoChinaand isflagshipspeciesoftheYangtzeRiver.白鲟和长江鲟是长江流域具有代表性的水生物种。白鲟 是世界上最大的淡水鱼品种之一,体长可达7米。它是中国及长江的特有物种。TheChinesepaddlefishwaslis tedasafirst-classstateprotectedanimalinChinain1989and wasfirstdeclared"criticallyendangered"bytheIUCNin1996.I UCNexpertshavesaidthereisnoimageevidenceofthespeciess ince2009.Itwaslastseenalivein2003.1989年,白鲟被列为国家一级保护动物,199 6年,世界自然保护联盟首次宣布白鲟为“极度濒危物种”。世界自然保护联盟的专家表示,自2009年以来,就没有关于该物种的图像证据。它 最后一次被人们发现是在2003年。AlongwiththelossoftheChinesepaddlefish,a nothersturgeonspecies,theYangtzesturgeonisnowclassifieda s"extinctinthewild."Existingindividualsintheriverareth eresultofthereleaseofcaptivestocks.随着白鲟的消失,长江鲟也被列为“野外灭绝”。河 流中现存的长江鲟均为人工圈养种群。WildpopulationsoftheSiberiansturgeon,thet hirdspeciesinAsiamentionedintheassessmentandwidelyused inaquaculture,werealsomovedtothehighestthreatcategoryof criticallyendangered.西伯利亚鲟(再评估报告中提到的第三种亚洲鲟,是一种广泛用于水产养殖的鲟鱼)的野生种群也被移至极度濒危类别。重难点词汇:extinction[?k?st??k?n]n.灭绝;绝种;消亡endanger[?n?de?nd??r]v.使处于危险之中;危及;危害vulnerable[?v?ln?r?bl]adj.易受攻击的;易受伤害的;脆弱的 |
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