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            1. 黑龍江扎龍保護區今年孵出67只丹頂鶴
              文章來源:未知 文章作者:enread 發布時間:2019-08-02 08:45 字體: [ ]  進入論壇
              Sixty-seven red-crowned cranes were hatched this year in Zhalong National Nature Reserve, the world's largest captive breeding center for the endangered bird species, in northeast China's Heilongjiang Province.
              Around 1,000 red-crowned cranes have been artificially bred in the Zhalong reserve, set up in 1979 and covering an area of 2,100 square kilometers in China's largest reed wetland.
              The reserve has been exploring ways to train the captive-bred cranes for release into the wild to raise the crane population with a healthy genetic1 pedigree. More than 300 cranes have been released and the population of red-crowned cranes in the reserve currently stands at around 500.
              The reserve started to place ring marks on the birds' legs to avoid inbreeding in 2002 and has diverted 2.9 billion cubic meters of water from nearby rivers to prevent wetland degradation2.
              Red-crowned cranes are usually found in northeast China, Russia, Japan, South Korea and the Democratic People's Republic of Korea. There are around 2,400 red-crowned cranes living in the wild worldwide.


              1 genetic PgIxp     
              • It's very difficult to treat genetic diseases.遺傳性疾病治療起來很困難。
              • Each daughter cell can receive a full complement of the genetic information.每個子細胞可以收到遺傳信息的一個完全補償物。
              2 degradation QxKxL     
              • There are serious problems of land degradation in some arid zones.在一些干旱地帶存在嚴重的土地退化問題。
              • Gambling is always coupled with degradation.賭博總是與墮落相聯系。
              TAG標簽: reserve cranes species