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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 Ricker model ： ウィキペディア英語版 Ricker model The Ricker model, named after Bill Ricker, is a classic discrete population model which gives the expected number ''a'' ''t''+1 (or density) of individuals in generation ''t'' + 1 as a function of the number of individuals in the previous generation,〔Ricker (1954)〕 : $a\_\; =\; a\_t\; e^\backslash right)\}.\backslash ,$ Here ''r'' is interpreted as an intrinsic growth rate and ''k'' as the carrying capacity of the environment. The Ricker model was introduced in 1954 by Ricker in the context of stock and recruitment in fisheries. The model can be used to predict the number of fish that will be present in a fishery.〔de Vries et al.〕〔Marland〕 Subsequent work has derived the model under other assumptions such as scramble competition〔Brännström and Sumpter(2005)〕 or within-year resource limited competition.〔 The Ricker model is a limiting case of the Hassell model〔Geritz and Kisdi (2004)〕 which takes the form : $a\_\; =\; k\_1\; \backslash frac.$ When ''c'' = 1, the Hassell model is simply the Beverton–Holt model. ==See also== * Population dynamics of fisheries 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「Ricker model」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.