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Discrete Dynamics in Nature and Society
Volume 2017 (2017), Article ID 1964286, 11 pages
Research Article

Nonstationary and Chaotic Dynamics in Age-Structured Population Models

School of Business and Economics, The Arctic University of Norway, Campus Harstad, Harstad, Norway

Correspondence should be addressed to Arild Wikan

Received 31 March 2017; Revised 10 May 2017; Accepted 18 May 2017; Published 6 August 2017

Academic Editor: Abdelalim Elsadany

Copyright © 2017 Arild Wikan and Ørjan Kristensen. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The dynamics from nonlinear discrete age-structured population models is under consideration. Focus is on bifurcations, as well as nonstationary and chaotic dynamics. We also explore different mechanisms which may lead to periodic phenomena. Some new results are also presented, in particular from models where both fecundity and survival terms contain nonlinear elements.