These survivors are all the progeny of just two males and four females, and display the lowered fertility and above-average infant mortality that goes with inbreeding.

• 这些幸存者均由2只雄虎和4只雌虎繁衍而来，繁殖能力明显减退，并且由于近亲繁殖其幼虎死亡率也超出平均水平。