In 1850, there were around 350,000 slaveholders in a total free southern population of about six million.

There are also some Protestants among the southern population, as well.

Breeding has not been studied in the southern population.

However, southern populations of yellow perch generally grow much faster.

Better details are available for the more extensively studied southern population.

Meanwhile, ecological data shows some interesting differences between southern populations too.

The differentiation that is observed between the northern and southern populations should have occurred quite recently.

Some southern populations are yellow in the adult stage.

How did those dense southern Maya populations deal with their resulting water problem?

The growth rate depends partly on where in their range they occur, with southern populations often growing faster and larger.