According to standard of minimum viable population, the ex-situ conservation of 73 rare and endangered plants are effective.

按照最小存活种群的标准，该园有73种稀有濒危植物迁地保护有效。

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China's panda experts believe the 300 pandas in captivity are the minimum viable population for the species to reproduce and sustain in 100 years to come.

中国的熊猫专家认为大熊猫在人工饲养的300是最小存活种群的物种繁殖和维持100年的到来。

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He would like to concentrate his citizens, boosting the population density in areas that are still economically viable, while encouraging people to move out of districts that are not.

他希望将他的市民都聚集起来，而不是鼓励人们离开这个地方，促进地区的人口密度在经济上依旧是可行的。

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It is impossible for the species to be a viable population by natural reproduction.

BBC: Earth News - Giant fish 'verges on extinction'

This lends weight to the theory that a viable hybrid population was sustained by interbreeding over a long time.

ECONOMIST: Humans could have interbred with chimpanzees

Ranchers say the wolves prey on their livestock, and they argue that the program is unnecessary because there is already a viable wolf population in the area.

CNN: Appeals court ruling protects wolves in Yellowstone