Here are entered works on groups of fish, all of the same species, that occupy a particular area. Works on groups of fish populations interacting and living together in a particular environment are entered under Fish communities.
Here are entered works on the characteristics of human populations, especially with reference to the size and density, growth, distribution, migration, and vital statistics, and the effect of these on social and economic conditions. --subdivision Population under names of countries, cities, etc., and under ethnic groups
