A solvable senescence model showing a mortality plateau

Details A solvable senescence model showing a mortality plateau A solvable senescence model showing a mortality plateau

2002-06-28

arxiv.org/abs/cond-mat/0206579v2

Physics

Condensed Matter

Soft Condensed Matter

4 pages

Scientific paper

10.1103/PhysRevLett.89.288103

We present some analytic results for the steady states of the Penna model of sen escence, generalised to allow genetically identical individuals to die at differ ent ages via an arbitrary survival function. Modelling this with a Fermi functio n (of modest width) we obtain a clear mortality plateau late in life: something that has so far eluded explanation within such mutation accumulation models. This suggests that factors causing variable mortality withi n genetically identical subpopulations, which include environmental effects, may be essential to understanding the mortality plateau seen in many real species.

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