另外早些时候说的中俄边境豹地公园一带发现17只跨境虎,总共33只东北虎。最后一句话:同时在中国东北没有发现此前未在俄境内被记录到的成年老虎。这句话是不真实的。俄罗斯那边根本没有说过这样的话。北师大的调查是:2014年中国这个地区有26只虎,其中22只生活在靠近中俄边境5公里的地方。很显然,俄罗斯那边看到33只,其中跨境的是17只。那么说明16只完全在俄罗斯一边,17只跨境,9只完全是在中国这边。所以2014-2015年这段时间,这个地区总共有42只东北虎。这个地区的面积大概是4000平方公里。所以这个地区的老虎已经达到每一百平方公里一只东北虎的水平。当然42只里面包括了幼虎。但是我们有理由断定这个地区的东北虎已经达到饱和状态。 俄罗斯这边发表的正式文章: While comparing Russian and Chinese photo-monitoring data researchers identified 78 adult individuals and 9 cubs of Amur leopard, which were photographed in the two countries during 2014. Most significantly, a combined database of photographs revealed that 31 of all leopards were photographed on both sides of the international border, demonstrating the lack of barriers to movement and accentuating the need for transboundary cooperation to ensure a future for this subspecies. In the same time both countries have their own ”unique” individuals - at least 40 leopards were captured only in Russia and 13 ones only in China in 2014. “According to the last year data, in the territory of the National Park “Land of the Leopard” 33 Siberian tigers were identified, of which 17 were also recorded in China”, tells Anna Vitkalova, Head of Research Department of FSBI “Land of the Leopard”. – It is interesting that two “Russian” tigresses with their kittens were captured in China. Probably, they were born abroad”. 注意,文章没有说”同时在中国东北没有发现此前未在俄境内被记录到的成年老虎。“ 北师大的论文原文: From August 2012 to July 2014, we obtained 42,377independent entity records from 380 camera trapstations, which operated for a total of 175,127 trapdays. We photographed 26 tiger individuals, including 15 adults (greater than 2 years old; seven males, six females, andtwo of unknown sex), five subadults (1–2 years old; twomales, two females, and one of unknown sex), and sixcubs (less than 1 year old) born during the study period. Thespatial pattern of the relative abundance index (RAI, thenumber of photographs of the target species per 100 trapdays) reveals that tigers were concentrated along theChina-Russia border, with 22 of the 26 animals (85 %)spotted within 5 km to the border (Fig. 2b).