Generalizing Fisher's “reproductive value”: Nonlinear, homogeneous, biparental systems*
AUTOR(ES)
Samuelson, Paul A.
RESUMO
Biparental demographic models violate linearity. However, in their early “dilute” stages before limited environment resources bring need for competitive selection, first-degree-homogeneous relations obtain. For them, a reproductive-value function of the initial coordinates is defined to recapitulate their contribution to the asymptotically dominating mode of exponential growth: now the generalized Fisher reproductive value of one sex is altered by relative numbers of the other sex. The new reproductive-value function is also derived for general systems of homogeneous-first-degree differential and difference equations, and is shown to grow from the start at the asymptotic growth rate.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=431876Documentos Relacionados
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