2007年8月8日，英国《皇家协会生物学快报》期刊发表报告，正式公布白鱀豚功能性灭绝，文章的作者是英国人特维（Sumuel Turvey），他参加了2006年的那次寻找白鱀豚的考察，当时，他只是英国一家动物园的普通研究人员。有谁能找到特维的这篇报告吗？
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First human-caused extinction of a cetacean species?Samuel T Turvey, Robert L Pitman, Barbara L Taylor, Jay Barlow, Tomonari Akamatsu, Leigh A Barrett, Xiujiang Zhao, Randall R Reeves, Brent S Stewart, Kexiong Wang, Zhuo Wei, Xianfeng Zhang, L.T Pusser, Michael Richlen, John R Brandon, Ding WangPublished 22 October 2007.DOI: 10.1098/rsbl.2007.0292
Abstract
The Yangtze River dolphin or baiji (Lipotes vexillifer), an obligate freshwater odontocete known only from the middle-lower Yangtze River system and neighbouring Qiantang River in eastern China, has long been recognized as one of the world's rarest and most threatened mammal species. The status of the baiji has not been investigated since the late 1990s, when the surviving population was estimated to be as low as 13 individuals. An intensive six-week multi-vessel visual and acoustic survey carried out in November–December 2006, covering the entire historical range of the baiji in the main Yangtze channel, failed to find any evidence that the species survives. We are forced to conclude that the baiji is now likely to be extinct, probably due to unsustainable by-catch in local fisheries. This represents the first global extinction of a large vertebrate for over 50 years, only the fourth disappearance of an entire mammal family since AD 1500, and the first cetacean species to be driven to extinction by human activity. Immediate and extreme measures may be necessary to prevent the extinction of other endangered cetaceans, including the sympatric Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientalis).
Abstract
The Yangtze River dolphin or baiji (Lipotes vexillifer), an obligate freshwater odontocete known only from the middle-lower Yangtze River system and neighbouring Qiantang River in eastern China, has long been recognized as one of the world's rarest and most threatened mammal species. The status of the baiji has not been investigated since the late 1990s, when the surviving population was estimated to be as low as 13 individuals. An intensive six-week multi-vessel visual and acoustic survey carried out in November–December 2006, covering the entire historical range of the baiji in the main Yangtze channel, failed to find any evidence that the species survives. We are forced to conclude that the baiji is now likely to be extinct, probably due to unsustainable by-catch in local fisheries. This represents the first global extinction of a large vertebrate for over 50 years, only the fourth disappearance of an entire mammal family since AD 1500, and the first cetacean species to be driven to extinction by human activity. Immediate and extreme measures may be necessary to prevent the extinction of other endangered cetaceans, including the sympatric Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientalis).
2006年大搜索其实有漏洞
郝玉江说，2006年底，20多位顶级鲸类专家在长江进行大规模搜索活动，并非专门为找寻白鳍豚，同时寻找的还有江豚。搜索队当时分乘两艘大型船只，采用水下探测器和人员轮流上甲板观察水面的方法搜索，搜索行动白天进行，晚上停船休息。
这种搜索存在几个漏洞：一、两艘搜索船是大型船只，无法到白鳍豚经常出没的通江支流和湖泊；二、夜间没有搜索；三、水下探测器有效范围为300～500米，在江面宽的地方存在盲区；四、搜索人员轮流在甲板上用望远镜搜索，难免会有注意力不集中的时候，"从武汉到宜昌，到上海再返回武汉，我们确实没有发现白鳍豚，不过，没有发现不等于没有"。
郝玉江说，2006年底，20多位顶级鲸类专家在长江进行大规模搜索活动，并非专门为找寻白鳍豚，同时寻找的还有江豚。搜索队当时分乘两艘大型船只，采用水下探测器和人员轮流上甲板观察水面的方法搜索，搜索行动白天进行，晚上停船休息。
这种搜索存在几个漏洞：一、两艘搜索船是大型船只，无法到白鳍豚经常出没的通江支流和湖泊；二、夜间没有搜索；三、水下探测器有效范围为300～500米，在江面宽的地方存在盲区；四、搜索人员轮流在甲板上用望远镜搜索，难免会有注意力不集中的时候，"从武汉到宜昌，到上海再返回武汉，我们确实没有发现白鳍豚，不过，没有发现不等于没有"。
IP属地:上海
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