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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Natality in population ecology ： ウィキペディア英語版 Natality in population ecology Natality in population ecology is the scientific term for birth rate. Along with mortality rate, natality rate is used to calculate the dynamics of a population. They are the key factors in determining whether a population is increasing, decreasing or staying the same in size. Natality is the greatest influence on a population’s increase. Natality is shown as a crude birth rate or specific birth rate. Crude birth rate is used when calculating population size (number of births per 1000 population/year), whereas specific birth rate is used relative to a specific criterion such as age. By calculating specific birth rate, the results are seen in an age-specific schedule of births. == Definitions == *Natality Rate – number of births per 1000 individuals per year. *Absolute Natality – the number of births under ideal conditions (with no competition, abundance of resources such as food and water, etc.). *Realized Natality – the number of births when environmental pressures come into play. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Natality in population ecology」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.