population density

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population density

The number of organisms, usually people, living within a defined space, such as a city, county, or town. In the U.S., regions with greater population densities tend to have different health care problems than lightly populated ones. Conditions such as gunshot wounds, HIV/AIDS, and tuberculosis are more common in cities than in rural areas, but cities also tend to have a greater health care infrastructure and more professional resources than rural areas.
See also: density


1. the ratio of the mass of a substance to its volume.
2. the quality of being compact.
3. the quantity of matter in a given space.
4. the quantity of electricity in a given area, volume or time.
5. the degree of film blackening in an area of a photograph or radiograph.

population density
number of animals per unit of area; important in relation to the rate of spread of disease.
density sampling


all of the animals in a specifically defined area considered as a whole. The population may also be defined in modes other than geography, e.g. the cow population, a species specification, the nocturnal bird population.

binomial population
see binomial population.
population cartogram
a map of populations.
case population
see case population.
closed population
e.g. closed herd or flock; a population into which no introductions are permitted, including artificial insemination or embryo transfer; the population is genetically and/or hygienically isolated.
comparison population
see comparison population.
contiguous p's
the populations are separated but have a common border. Some diseases are very difficult to restrain from spreading from one population to the next.
control population
see control population.
population density
see population density.
experimental population
the population in which the experiment, or trial, is being conducted.
finite population
one capable of total examination by census.
genetic population
see deme.
genetically defined population
one in which the ancestry of the animals in it is known.
population genetics
deals with the frequency of occurrence of inherited characteristics in a population.
infinite population
cannot be examined as a total population because they may never actually exist but are capable of statistical importance.
population limitation
restricting the growth of an animal population by desexing, by culling or by managemental means of interfering with reproduction.
population mean
the mean of the population.
population numbers
see population size (below).
open population
one in which immigration in and out is unrestrained.
parent population
the original population about which it is hoped to make some inferences by examination of a sample of its constituent members.
population proportion
the percentage of the population that has the subject characteristics.
population pyramid
a graphic presentation of the composition of a population with the largest group forming the baseline, the smallest at the apex.
population at risk
see risk population (below).
risk population
the population which is composed of animals that are exposed to the pathogenic agent under discussion and are inherently susceptible to it. Called also population at risk. High or special risk groups are those which have had more than average exposure to the pathogenic agent.
population size
actual counting of a total population, the census method, is not often possible in large animal populations. Alternatives are by various sampling techniques including area trapping, the trapping of all animals in an area, the capture-release-recapture method, the nearest neighbor and line transect methods,
The population size is expressed as the population present at a particular instant. Alternatively it can be expressed as an animal-duration expression when the population is a shifting one and it is desired to express the population size over a period (e.g. cow-day).
stable population
a population which has constant mortality and fertility rates, and no migration, therefore a fixed age distribution and constant growth rate.
target population
in epidemiological terms the population from which an experimenter wishes to draw an unbiased sample and make inferences about it.
References in classic literature ?
I did not mean," he said over the soup, addressing Alexey Alexandrovitch, "mere density of population alone, but in conjunction with fundamental ideas, and not by means of principles.
The extension will also cater the growing commuter traffic in the region, as the density of population and employment in the area is expected to increase by 19% and 12% respectively by 2030.
The project will reduce the problems facing Saudi cities, including high density of population, increased power consumption, and underdeveloped and disorganized residential districts.
Participants of the conference also discussed the issue of Ferghana Valley, which occupies a special place bordering with Kyrgyzstan, Uzbekistan and Kazakhstan, with the density of population of 360 persons for 1 km2.
They are part of the strategy to reinforce public order and security in some areas with a high density of population with law-breaking cases," he said.
The committee also found out that some villages have been merged with nearby cities despite the differences in needs and lack of representation due to the density of population in the nearby cities.
They called on the government "to act for the mutual benefit" of the asylum seekers and Israelis "by investing money in improving the infrastructure, welfare and health services in neighborhoods where many asylum-seekers reside, and by working to decrease the density of population in those areas by granting asylum-seekers work permits and encouraging Israelis to employ them".
The density of population and the closeness of towns and cities in Britain renders it unsuitable for high-speed rail.
Brigadier Al Harithi also stressed the need to abide by the legal speed limits displayed on road signs, which were determined after thorough studies of the traffic movement and the density of population in each area.
It said anyone who had to travel to Southern Guinea should "strictly respect the hygiene rules, not consume the meat of animals killed by hunting and stay away from areas of high density of population like markets and football grounds".
The council said that rising drug prices was a problem "which hit all GCC countries with the exception of the Kingdom of Saudi Arabia (KSA) where the lower prices are attributed to a variety of reasons such as the high density of population, huge number of visitors especially during the Haj and Umrah seasons and the difference in health systems applied".
Government can afford to overlook the countryside: there isn't the density of population (or of votes), so statisticians will talk about value for money, relative expenditure per head of (sparse) population.