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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 Beverton–Holt model ： ウィキペディア英語版 Beverton–Holt model The Beverton–Holt model is a classic discrete-time population model which gives the expected number ''n'' ''t''+1 (or density) of individuals in generation ''t'' + 1 as a function of the number of individuals in the previous generation, : $n\_\; =\; \backslash frac.$ Here ''R''0 is interpreted as the proliferation rate per generation and ''K'' = (''R''0 − 1) ''M'' is the carrying capacity of the environment. The Beverton–Holt model was introduced in the context of fisheries by Beverton & Holt (1957). Subsequent work has derived the model under other assumptions such as contest competition (Brännström & Sumpter 2005) or within-year resource limited competition (Geritz & Kisdi 2004). The Beverton–Holt model can be generalized to include scramble competition (see the Ricker model, the Hassell model and the Maynard Smith–Slatkin model). It is also possible to include a parameter reflecting the spatial clustering of individuals (see Brännström & Sumpter 2005). Despite being nonlinear, the model can be solved explicitly, since it is in fact an inhomogeneous linear equation in 1/''n''. The solution is : $$ n_t = \frac = rN \left( 1 - \frac \right), and its solution is : $$ N(t) = \frac{N(0) + (K - N(0)) e^{-rt}}. ==References== * * * * Category:Biostatistics Category:Fisheries science Category:Stochastic processes 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「Beverton–Holt 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.