crude density
the number of individuals in an area

Dictionary of ichthyology. 2009.

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  • Crude oil assay — A crude oil assay is essentially the chemical evaluation of crude oil feedstocks by petroleum testing laboratories. Each crude oil type has unique molecular, chemical characteristics. No crude oil type is identical and there are crucial… …   Wikipedia

  • Light crude oil — is liquid petroleum that has a low density and flows freely at room temperature.[1] It has a low viscosity, low specific gravity and high API gravity due to the presence of a high proportion of light hydrocarbon fractions.[2] It generally has a… …   Wikipedia

  • Heavy crude oil — or Extra Heavy oil is any type of crude oil which does not flow easily. It is referred to as heavy because its density or specific gravity is higher than of light crude oil. Heavy crude oil has been defined as any liquid petroleum with an API… …   Wikipedia

  • List of crude oil products — In the international petroleum industry, crude oil products are traded on various oil bourses based on established chemical profiles, delivery locations, and financial terms. The chemical profiles, or crude oil assays, specify important… …   Wikipedia

  • Energy density — For energy density in the sense of energy per unit mass, see specific energy. For energy density of foods, see specific energy. Energy density is a term used for the amount of energy stored in a given system or region of space per unit volume.… …   Wikipedia

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  • API gravity — The American Petroleum Institute gravity, or API gravity, is a measure of how heavy or light a petroleum liquid is compared to water. If its API gravity is greater than 10, it is lighter and floats on water; if less than 10, it is heavier and… …   Wikipedia

  • Petroleum — For other uses, see Petroleum (disambiguation). Proven world oil reserves, 2009 …   Wikipedia

  • Peak oil — A logistic distribution shaped production curve, as originally suggested by M. King Hubbert in 1956 …   Wikipedia

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