It is the largest in the country with respect to species population.

Menhaden is managed with limits on fishing in order to help the species population grow.

A 1994 census estimated the species population to be 1,000 to 1,200 individuals.

The species population is currently large throughout most of its range, and also in many suburban locations.

There the species natural populations are rare and restricted.

Meanwhile, native species populations in the marsh have reached critically low levels.

The reduction of sea ice will cause certain species populations to decline or even become extinct.

In all cases, these fish and shellfish are part of a species population and an ecological system.

However, environmentalists hope that current conservation efforts should help the species population to at least stabilize.

If one has information on species populations from the past in addition to the present, the magnitude of extinction debt can be estimated.