کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
978686 | 933298 | 2011 | 5 صفحه PDF | دانلود رایگان |
A large amount of population models use the concept of a carrying capacity. Simulated populations are bounded by invoking finite resources through a survival probability, commonly referred to as the Verhulst factor. The fact, however, that resources are not easily accounted for in actual biological systems makes the carrying capacity parameter ill-defined. Henceforth, we deem it essential to consider cases for which the parameter is unnecessary. This work demonstrates the possibility of Verhulst-free steady states using the Penna aging model, with one semelparous birth per adult. Stable populations are obtained by setting a mutation threshold that is higher than the reproduction age.
Research highlights
► In many observed systems, the carrying capacity is commonly not well accounted for.
► Stable, Verhulst-free populations are found using the Penna model.
► Equilibrium is achieved by imposing one semelparous birth per adult.
Journal: Physica A: Statistical Mechanics and its Applications - Volume 390, Issue 7, 1 April 2011, Pages 1295–1299