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Researchers say a large fish that was thought to have disappeared from Asia's Mekong River has been seen in the waterway in recent years.
The fish is called a giant salmon carp. A recent study detailed the most recent sightings of the fish. The lead writer of that study said the fish was seen at least three times between 2020 and 2023.
The predatory fish can grow to more than one meter in length and has an identifiable yellow spot surrounding its large eyes.
The Mekong River is Southeast Asia's longest river. It passes through China, Laos, Thailand, Myanmar, Cambodia and Vietnam. About 60 million people depend on the river for food and survival. It is also an important environment for numerous river creatures.
The leader of the research was Chheana Chhut. He is with the Inland Fisheries Research and Development Institute in Phnom Penh, Cambodia. "The giant salmon carp is like a symbol of the Mekong region," Chheana recently told The Associated Press.
He was the co-writer with other researchers of a study announcing the findings in the publication Biological Conservation. Chheana said researchers had believed that the last confirmed sighting of the fish in the Mekong was in 2005.
But since 2017, biologists following the movements of migratory fish in Cambodia developed relationships with local fishing communities. They asked people in the communities to inform them of any unusual sightings.
That process led to the finding that three giant salmon carp were identified in the Mekong River and a neighboring waterway in Cambodia between 2020 and 2023.
Bunyeth Chan is a researcher at Cambodia's Svay Rieng University. He helped lead the research. Bunyeth told the AP, "I was really surprised and excited to see the real fish for the first time."
Researchers say the sightings give them new hope for the future of the species. Another name used for the species is "ghost fish."
"This rediscovery is very exciting, positive news," said Zeb Hogan. He is a fish biologist at the University of Nevada, Reno, who was part of the research team.
But the problems the fish experienced also demonstrate the dangers facing all migratory species in the Mekong. The huge river faces industrial pollution and overfishing, among other problems.
Brian Eyler is director of the Southeast Asia Program at the Stimson Center in Washington, D.C. He was was not involved in the research. Eyler said one issue is that more than 700 dams are built along the river and neighboring waterways. In addition, there are very few workable "fish passages" that help species avoid obstructions.
The Greater Mekong area includes Vietnam, Cambodia, Laos, Thailand and Myanmar.
The researchers said they hope that cooperation with local communities in Thailand and Laos will permit them to confirm whether the fish also still swims in other parts of the Mekong.
I'm Bryan Lynn.
The Associated Press reported this story. Bryan Lynn adapted the report for VOA Learning English.
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Words in This Story
predatory - adj. a predatory animal kills and eats other animals
symbol - n. a sign or objected used to represent something
species - n. a group of animals or plants that are similar and can produce young animals or plants
positive - adj. something good
obstruction - n. something that blocks something or someone from being able to do something
0 adapted | |
adj.适合的v.(使)适应, (使)适合( adapt的过去式和过去分词 );改编,改写;改变…以适合(for);适应于,适应不同情况(或环境)(to) | |
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0 addition | |
n.加法;附加,附加物,增加部分,加 | |
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0 along | |
adv.一道,一起;prep.沿着,顺着 | |
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0 also | |
adv.也,亦;并且;同样;而且,还 | |
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0 among | |
prep.在…中间,在…之中(三者或三者以上) | |
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0 animal | |
n.动物,兽,畜生 | |
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0 animals | |
n.动物( animal的名词复数 );兽;兽性;粗野残暴的人 | |
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0 announcing | |
v.宣布,宣告,发表( announce的现在分词 );(尤指通过广播)通知;通报…到达;声称 | |
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0 another | |
adj.另外的,再一,不同的;prep.另外一个,另一个人,同类的东西;pron.另一个,另外一个人,他人 | |
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0 any | |
adj.任何的;所有的 | |
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0 area | |
n.地区,区域,面积,方面 | |
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0 Asia | |
n.亚洲 | |
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0 associated | |
adj.联合的 | |
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0 avoid | |
v.避免;vt.避免,逃避 | |
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0 believed | |
v.相信( believe的过去式和过去分词 );认为;以为;对…信以为真 | |
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0 between | |
prep.在…之间,在(两者)之间;adv.在中间 | |
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0 biologist | |
n.生物学家 | |
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0 biologists | |
n.生物学家( biologist的名词复数 ) | |
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0 built | |
v.build的过去式和过去分词 | |
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0 called | |
v.叫( call的过去式和过去分词 );通电话;认为;估计 | |
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0 center | |
n.中心,中央;vi.居中;vt.使集中 | |
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0 communities | |
n.团体( community的名词复数 );共有;大众;(国家之间经济、政治)共同体 | |
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0 confirm | |
vt.证实;确认;v.确认 | |
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0 confirmed | |
adj.确认的;坚定的;根深蒂固的v.批准(confirm的过去式和过去分词);证实 | |
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0 conservation | |
n.保存,保持,守恒 | |
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0 cooperation | |
n.合作,协力,合作社 | |
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0 creatures | |
n.生物,动物( creature的名词复数 );人 | |
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0 dams | |
abbr.dental amalgam mercury syndrome 牙齿汞合金综合征n.坝,堤( dam的名词复数 );母兽(尤指骡马) | |
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0 dangers | |
n.危险( danger的名词复数 );可能造成损伤、疼痛等的人或物;危险因素;危害 | |
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0 demonstrate | |
vt.论证,证明;示范;显示;vi.示威游行 | |
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0 depend | |
vi.依靠,相信,指望 | |
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0 detailed | |
adj.详细的,详尽的,极注意细节的,完全的 | |
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0 developed | |
adj.先进的;发达的(国家或地区) | |
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0 development | |
n.发育,成长;发展,进展;发达;开发 | |
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0 director | |
n.主管,导演;主任;理事;董事;处长 | |
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0 disappeared | |
v.不见,消失( disappear的过去式和过去分词 );不复存在;奭 | |
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0 environment | |
n.环境,生态环境,自然环境 | |
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0 excited | |
adj.激动的;兴奋的 | |
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0 exciting | |
adj.使激动的;兴奋的 | |
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0 experienced | |
adj.有经验的;经验丰富的,熟练的 | |
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0 few | |
adj.很少的,不多的,少数的;int.少数的 | |
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0 finding | |
n.发现,发现物;调查的结果 | |
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n.发现物( finding的名词复数 );调查(或研究)的结果;(陪审团的)裁决 | |
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0 first | |
adj.第一的;adv.首先 | |
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0 fishing | |
n.捕鱼;钓鱼,鱼业;adj.钓鱼的 | |
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0 following | |
n.下列各项,部下,党羽;aaj.下列的,其次的;vbl.跟随 | |
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0 future | |
adj.将来的,未来的;n.将来,未来 | |
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0 ghost | |
n.鬼魂,幽灵 | |
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0 giant | |
adj.庞大的,巨大的;n.巨人,大力士,巨大的怪物 | |
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0 group | |
n.小组,这里指演出流行一组演员 | |
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0 grow | |
v.生长,成长;渐渐变成;栽培,种植;发展 | |
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0 had | |
vbl.have的过去式和过去分词;conj.有 | |
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0 help | |
v.帮助,帮忙 | |
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0 helped | |
v.帮助( help的过去式和过去分词 );有助于,有利于;治疗;避免 | |
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0 hope | |
vt.希望,期望;vi.希望,期待;n.希望,期望 | |
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0 huge | |
adj.巨大的,庞大的 | |
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0 identifiable | |
adj.可辨认的;可视为相同的 | |
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0 identified | |
v.认出( identify的过去式和过去分词 );支持;确认;辨认 | |
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0 important | |
adj.重要的;重大的;严重的 | |
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0 includes | |
v.包括( include的第三人称单数 );包含;列入;包住 | |
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0 industrial | |
adj.工业的,产业的,实业的;从事工业的;工业高度发达的 | |
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0 inform | |
vt.告诉,通知;使充满;vi. 告发,告密 | |
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0 inland | |
adj.内地的;内陆的 adv.在内地;向内地 | |
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0 institute | |
n.学会,协会;讲习会,讲座;vt.建立,设立;开始 | |
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0 involved | |
a.复杂的,有密切关系的 | |
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0 issue | |
n.出版,发行,(报刊等)期、号,论点,问题,结果, (水,血等的)流出;vt.使流出,放出,发行(钞票等),发布(命令),出版(书等)发给;vi.发行,流出,造成...结果,进行辩护,传下 | |
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0 kills | |
v.杀死( kill的第三人称单数 );使停止[结束,失败];破坏,减弱,抵消;使痛苦,使受折磨 | |
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0 large | |
adj.大的,大量的,宽大的 | |
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0 lead | |
v.引导,致使;领导 | |
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0 leader | |
n.领导者;指挥者 | |
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0 learning | |
n.学问,学识,学习;动词learn的现在分词 | |
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0 least | |
adj.最小(少)的;adv.最少(小;不);n.最小(少) | |
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0 led | |
(light emitting diode)发光二极管 | |
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0 length | |
n.长度,长;期间,一段;程度,范围 | |
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0 local | |
adj.地方性的,当地的,局部的;乡土的;本地的;n.当地居民,本地新闻 | |
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0 longest | |
adj.长的;(距离,长度)长的( long的最高级 );长时间的;(因忙或不愉快等)似乎比实际时间长的;长音的 | |
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0 meter | |
n.公尺;韵律;计量器;v.以计量器计量 | |
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0 migratory | |
n.候鸟,迁移 | |
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0 million | |
num.百万,100万;n.无数,大众 | |
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0 most | |
adj.最多的(many,much的最高级) | |
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0 movements | |
n.整个活动;运动( movement的名词复数 );动作;移动;调动 | |
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0 neighboring | |
adj.邻近的v.邻居,邻国( neighbor的现在分词 );邻近的,邻接的 | |
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0 numerous | |
adj.为数众多的;极多的 | |
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0 objected | |
v.不赞成( object的过去式和过去分词 );抗议;拒绝接受;抱反感 | |
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0 obstruction | |
n.阻塞,堵塞;障碍物 | |
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0 obstructions | |
n.障碍物( obstruction的名词复数 );阻碍物;阻碍;阻挠 | |
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0 part | |
n.部份,零件;角色,部位;vt.分开,分离,分配;vi.分离,离开;adv.部份地;adj.分离的 | |
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0 parts | |
n.部( part的名词复数 );一部分;零件;角色 | |
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0 passages | |
n.通道( passage的名词复数 );经过;通路;(文章的)一段 | |
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0 passes | |
v.走过( pass的第三人称单数 );通过;批准;度过 | |
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0 people | |
n.人们,人;(the-)人民;一国人民,民族 | |
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0 permit | |
n.许可证,许可,执照;vt.允许,容许;vi.容许 | |
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0 plants | |
n.(plural form of plant,plant的复数形式)植物,农作物;植物( plant的名词复数 );工厂;发电厂;幼苗v.种植( plant的第三人称单数 );建立;移植(动物、植物);在(某处)栽种 | |
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0 pollution | |
n.污染;污染物 | |
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0 positive | |
adj.肯定的;正面的,积极的;n.正片 | |
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0 press | |
n.新闻界,压力;v.按,压 | |
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0 problems | |
n.问题( problem的名词复数 );疑难问题;习题;思考题 | |
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0 process | |
n.程序,进行,过程;vt.加工,处理,对…处置,对…起诉;adj.经加工的,三色版的 | |
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0 produce | |
n.产品,农作物;vt.生产,提出,引起,分娩,制片;vi.生产,制造 | |
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0 program | |
n.节目,程序,计划;v.规划,拟...计划,制作节目 | |
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0 publication | |
n.出版,发行;出版;公布,发表 | |
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0 real | |
adj.真实的;非虚构的;真正的;非常的 | |
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0 really | |
adv.真正地,实际上,实际上;很;实,其实 | |
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0 recent | |
adj.近来的,新近的 | |
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0 recently | |
adv.近来,最近 | |
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0 relationships | |
n.(事物之间的)关系( relationship的名词复数 );(人、团体、国家之间的)关系;情爱关系;血缘关系 | |
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0 report | |
n.报告,汇报;传说,传阅;v.报告,报到 | |
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0 reported | |
adj.据报告的,据报导的,据传闻的 | |
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0 represent | |
vt.表现,表示;描绘,讲述;代表,象征;回忆;再赠送,再上演;vi.提出异议 | |
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0 research | |
n.探索;调查;研究 vt./vi.调查;研究 | |
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0 researcher | |
n.研究员 | |
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0 said | |
v.动词say的过去式、过去分词 | |
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0 salmon | |
n.鲑,大马哈鱼,橙红色的 | |
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0 seen | |
vbl.(see的过去分词)看见 | |
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0 sighting | |
n.目击物,目击场所 | |
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0 sign | |
v.签(名),署(名);n.符号,标记;踪迹,迹象 | |
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0 similar | |
adj.类似的;同样的 | |
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0 since | |
adv.后来;conj.既然,因为,自从;prep.自从 | |
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0 something | |
pron.某事,某物;被视为有意义的事物 | |
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0 southeast | |
n.东南,东南地区;adj.东南的,向东南的,来自东南的; adv.往东南,来自东南 | |
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0 species | |
n.物种,种群 | |
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0 spot | |
n.班点,污点,地点,场所,现场;v.沾污,弄脏,侦察;认出,发现 | |
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0 still | |
adj.静止的,寂静的;adv.还,仍然;更;安静地 | |
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0 study | |
vt.学习;研究;细看;vi.读书;n.学习;研究 | |
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0 surprised | |
adj.感到惊讶的,感到惊奇的 | |
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0 surrounding | |
adj.周围的;n.环境,周围的事物 | |
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0 survival | |
n.留住生命,生存,残存,幸存者 | |
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0 swims | |
n.熏鱼上附着的鳔v.游泳( swim的第三人称单数 );眩晕;浸;泡 | |
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0 symbol | |
n.符号,标志,象征 | |
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0 team | |
n.队,组;v.协同工作 | |
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0 Thailand | |
n.泰国 | |
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0 thought | |
n.想法,思想,思维,思潮,关心,挂念;v.vbl.think的过去式和过去分词 | |
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0 through | |
adv.穿越,完全;prep.经过,穿过,凭借 | |
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0 university | |
n.大学 | |
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0 unusual | |
adj.不平常的,异常的;与众不同的,独特的 | |
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0 used | |
adj.用旧了的,旧的;习惯于…;过去惯/经常 | |
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0 Vietnam | |
n.越南 | |
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0 was | |
v.(is,am的过去式)是,在 | |
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0 Washington | |
n.华盛顿特区(是美国首都) | |
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0 whether | |
conj.是否…,是不是…;是否…,是不是… | |
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0 words | |
n.字( word的名词复数 );(说的)话;诺言;口令 | |
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0 writer | |
n.作家,记者,撰稿者,抄写员 | |
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0 years | |
n.年( year的名词复数 );年纪;一年的期间;某年级的学生 | |
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0 yellow | |
adj.黄(色)的;n.黄(色) | |
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0 young | |
adj.年轻的,幼小的;没经验的;n.青年人 | |
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