a population of cheetahs was hunted to near extinction during the last three decades of the 19th century. the number of animals increased to pre-19th century levels due to their location being made off limits to hunters during the latter half of the 20th century. albinism, which was previously rare in this population, is now 10-fold over the frequency observed prior to the near extinction event. this is an example of

A genetic bottleneck occurs when the size of a population is drastically reduced. Because only a small portion of the original population survives, the bottleneck reduces the species' genetic diversity. A population bottleneck, also known as a genetic bottleneck, is a sharp reduction in the size of a population caused by natural events such as famines, earthquakes, floods, fires, disease, and droughts, or by human activities such as specicide, widespread violence or intentional culling, and human population planning.

Northern elephant seals' genetic variation has likely decreased as a result of a population bottleneck imposed by humans in the 1890s. At the end of the nineteenth century, hunting reduced their population size to as few as 20 individuals.

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