The fence creates a genetic bottleneck causing high levels of inbreeding.

A genetic bottleneck may result from the small numbers of remaining plants.

It is thought that the species went through a prolonged period of inbreeding following a genetic bottleneck during the last ice age.

The Florida panther experienced a genetic bottleneck in the early 1990s where the population was reduced to 25 adult individuals.

Nevertheless, a genetic bottleneck exists in the existing population, which could make it more susceptible to disease and pollution.

In spite of the small population size, the animals do not appear to suffer genetic problems from the genetic bottleneck.

This created a genetic bottleneck that some people think will render breeding from closed stud books not viable.

A 2005 study was conducted to identify past genetic bottlenecks in the Marwari.

It concluded that bison seem to be doing quite well, despite their apparent genetic bottleneck.

Even that herd was reduced to only a few dozen individuals, so concerns about a genetic bottleneck are significant.