Despite his attempts to introduce a new species to the area, by dispersing crabs about the harbour, the population did not persist.

Fortunately the population at that time persisted with the technology and made it much safer, and the industrial revolution took off.

These naturalized populations persist in the absence of any common cultivation by people.

However, as the plant is slow-growing and long-lived, its populations persist.

On the contrary, a strongly protected and relatively abundant population persist in Hungary.

Small very depressed populations of white sturgeon persist in the various reservoirs upstream.

Three small populations persist isolated from each other.

So the important question is under what parameter values does the original population persist (continue to exist)?

The population persists if and only if the steady state value of z is strictly positive.

These naturalized populations persist despite the plant not being grown in gardens on a regular basis.