Population
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Revision as of 18:18, 27 February 2009 by Astamoulis (talk | contribs)
This is one of the fundamental definitions for comprehending evolution.

Fig. A group of squirrelfish (Holocentrus ascensionis) that are shoaling, not schooling: though swimming as a group, their speed and direction are not synchronised. Source: [1]
A population is a group of individuals of one species that live in the same geographical area at the same time.