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1 Biological

**population**densities 1.1 Human densities 1.2 Countries and dependent territories 1.3 Other methods of measurement 2 See also 2.1 Lists of entities by**population density**3 References 4 External links Toggle the table of contents**Population density**131 languages Afrikaans Alemannisch العربية Aragonés Arpetan Asturianu Авар Azərbaycanca**Population**dynamics is the type of mathematics used to model and study the size and age composition of populations as dynamical systems . Contents 1 History 2 Logistic function 3 Intrinsic rate of increase 4 Epidemiology 5 Geometric populations 5.1 Doubling time 5.2 Half-life of geometric populations 5.3 Geometric (R) growth constantA demographic structure of a

**population**is how populations are often quantified. The total number of individuals in a**population**is defined as a**population**size, and how dense these individuals are is defined as**population****density**. There is also a**population**’s geographic range, which has limits that a species can tolerate (such as temperature).**Density**estimation (Redirected from**Density**Estimation) Demonstration of**density**estimation using Kernel**density**estimation: The true**density**is mixture of two Gaussians centered around 0 and 3, shown with solid blue curve. In each frame, 100 samples are generated from the distribution, shown in red.The generally accepted

**definition**of Allee effect is positive**density**dependence, or the positive correlation between**population****density**and individual fitness. It is sometimes referred to as "undercrowding" and it is analogous (or even considered synonymous by some) to "depensation" in the field of fishery sciences.In ecology, a

**population**is a group of organisms of the same species who inhabit the same particular geographical area and are capable of interbreeding. [1] [2] The area of a sexual**population**is the area where inter-breeding is possible between any pair within the area and more probable than cross-breeding with individuals from other areas. [3]The physiological

**density**or real**population****density**is the number of people per unit area of arable land . A higher physiological**density**suggests that the available agricultural land is being used by more and may reach its output limit sooner than a country that has a lower physiological**density**.