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 general works on overpopulation. Works restricted to overpopulation in a particular place are entered under the name of the place with the subdivision Population. Some general works on overpopulation cataloged before 1993 may be found under the heading Population.
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
