生活在长江中、下游干流及鄱阳湖、洞庭湖中的江豚被称为长江江豚(Yangtze finless porpoise)，它是江豚的唯一淡水亚种。上世纪90年代初期，长江江豚的数量约为2700头，但是目前其种群数量已下降至不足1400头。
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Results of the present study could be considered as references of reproduction researches and improvement of ecological observation methods of the Yangtze finless porpoise.
本研究的结果对开展长江江豚繁殖研究和改进江豚生态学观察方法具有参考价值。
The Baiji Conservation Aquarium has already scored small successes with a similar breeding scheme aimed at averting the extinction of the endangered Yangtze finless porpoise.
为防止这种无鳍海豚的灭绝，白鳍豚保护水族馆采用相同的培育方法已经取得了一些成就。
Increasing pollution of the Yangtze River and the threat this poses to the finless porpoise is also a warning for a third of the nation's population that depends on these waters.
持续不断的长江污染以及由此对江豚构成的威胁对于生活在这一水域占据全国人口三分之一的人们来说也是一个警告。
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