By the 1930 there were two separate populations isolated from each other.

"They need to be thought of as a separate population with their own problems and needs."

The 1940 census was the first to include separate population and housing questionnaires.

In the 1970s, the Russian population had fragmented into three separate, small populations.

A species is often a collection of more or less separate populations.

As of the 2011 census, no separate population was given for these fragments.

The county started reporting separate population counts with the 1920 Census.

Less than 1,000 mature individuals are likely to exist in three separate populations.

This is because a control group may necessarily be selected from a discrete separate population.

The benefits of this would include a separate population with a broader gene pool.