Periodic catastrophes over human evolutionary history are necessary to explain the forager population paradox

Proceedings of the National Academy of Sciences of the United States of America Vol/Iss. 116(26) PNAS Published In Pages: 12758-12766
By Gurven, Michael D., Davison, Raziel J.


Combining more than one of the four demographic scenarios (altered mean vital rates (i.e., fertility and mortality), vital rate stochasticity, vital rate covariance, and periodic catastrophes) increases the likelihood of returning the rate of population growth to ZPG p. 12763.


When only adult mortality increases, lower variance and covariance could generate ZPG. The most effective and reasonable combination to generate ZPG is catastrophes plus altered mean vital rates


Test NameSupportSignificanceCoefficientTail