mt DNA 16 S r RNA基因序列分析支持将现生淡水豚 4个属归入不同的科 ,即白暨豚科(L ipotiidae)、恒河豚科 (Platanistidae)、亚河豚科 (Iniidae)和弗西豚科 (Pontoporidae) .基于邻接法的系统发生分析显示淡水豚类由白暨豚 +恒河豚和...mt DNA 16 S r RNA基因序列分析支持将现生淡水豚 4个属归入不同的科 ,即白暨豚科(L ipotiidae)、恒河豚科 (Platanistidae)、亚河豚科 (Iniidae)和弗西豚科 (Pontoporidae) .基于邻接法的系统发生分析显示淡水豚类由白暨豚 +恒河豚和弗西豚 +亚河豚两个单系组成 ,但两个单系之间并无姊妹关系 .淡水豚类是并系的 .16 S r RNA基因的系统发生树与 mt DNA细胞色素 b基因和12 S r RNA基因的系统发生树并不完全一致 .这种差异一方面可能反映了不同的基因树间的差异 ,但也可能与本文分析的 16 S r RNA基因片段中变异位点数和简约信息位点数较少有关 .因此 ,有必要增加序列长度来进一步验证 .展开更多
The Chinese river dolphin or baiji (Lipotes vexillifer) is the most endangered cetacean found exclusively in the Yangtze River of China. Bioaccumulation of trace elements in the liver, kidney, muscle, intestine, skin,...The Chinese river dolphin or baiji (Lipotes vexillifer) is the most endangered cetacean found exclusively in the Yangtze River of China. Bioaccumulation of trace elements in the liver, kidney, muscle, intestine, skin, lung, stomach, pancreas, heart,and blood by a captive Chinese river dolphin named QiQi was studied by Agilent ICP-MS 7500 in detail for the first time. QiQi died a natural death in Institute of Hydrobiology, the Chinese Academy of Sciences on July 14th 2002. Tendency of tissue or organ specific accumulation of trace elements was found for copper(Cu) as 77.3 μg/g dry weight, molybdenum(Mo) as 1.66 μg/g dry weight in the liver, zinc (Zn) as 240 μg/g dry weight in the skin, selenium (Se) and cadmium(Cd) as 10.1 and 0.566 μg/g dry weight respectively in the kidney, aluminum (Al)as 27.4 and 23.2 μg/g dry weight respectively in the lung and skin. The tissular distribution pattern and level of Arsenic (As) were ascertained as well. In every tissue or organ As concentration was similar, ranging between 0.152 and 0.274 μg/g dry weight.展开更多
文摘mt DNA 16 S r RNA基因序列分析支持将现生淡水豚 4个属归入不同的科 ,即白暨豚科(L ipotiidae)、恒河豚科 (Platanistidae)、亚河豚科 (Iniidae)和弗西豚科 (Pontoporidae) .基于邻接法的系统发生分析显示淡水豚类由白暨豚 +恒河豚和弗西豚 +亚河豚两个单系组成 ,但两个单系之间并无姊妹关系 .淡水豚类是并系的 .16 S r RNA基因的系统发生树与 mt DNA细胞色素 b基因和12 S r RNA基因的系统发生树并不完全一致 .这种差异一方面可能反映了不同的基因树间的差异 ,但也可能与本文分析的 16 S r RNA基因片段中变异位点数和简约信息位点数较少有关 .因此 ,有必要增加序列长度来进一步验证 .
文摘The Chinese river dolphin or baiji (Lipotes vexillifer) is the most endangered cetacean found exclusively in the Yangtze River of China. Bioaccumulation of trace elements in the liver, kidney, muscle, intestine, skin, lung, stomach, pancreas, heart,and blood by a captive Chinese river dolphin named QiQi was studied by Agilent ICP-MS 7500 in detail for the first time. QiQi died a natural death in Institute of Hydrobiology, the Chinese Academy of Sciences on July 14th 2002. Tendency of tissue or organ specific accumulation of trace elements was found for copper(Cu) as 77.3 μg/g dry weight, molybdenum(Mo) as 1.66 μg/g dry weight in the liver, zinc (Zn) as 240 μg/g dry weight in the skin, selenium (Se) and cadmium(Cd) as 10.1 and 0.566 μg/g dry weight respectively in the kidney, aluminum (Al)as 27.4 and 23.2 μg/g dry weight respectively in the lung and skin. The tissular distribution pattern and level of Arsenic (As) were ascertained as well. In every tissue or organ As concentration was similar, ranging between 0.152 and 0.274 μg/g dry weight.
