Hostname: page-component-74656f9884-j7cmm Total loading time: 0 Render date: 2026-11-11T00:44:19.370Z Has data issue: false hasContentIssue false

Hybrid matrix models and their population dynamic consequences

Published online by Cambridge University Press:  15 April 2004

Sanyi Tang*
Affiliation:
Institute of Mathematics, Academy of Mathematics and System Sciences, Academia Sinica, Beijing, 100080, P.R. China. tsy@math08.math.ac.cn.
Get access

Abstract

In this paper, the main purpose is to reveal what kind of qualitative dynamicalchanges a continuous age-structured model may undergo as continuous reproduction is replaced withan annual birth pulse. Using the discrete dynamical system determined by the stroboscopic map we obtain an exact periodic solution of system with density-dependent fertility and obtain the threshold conditions for its stability. We also present formal proofs of the supercritical flip bifurcation at the bifurcation as well as extensive analysis of dynamics in unstableparameter regions. Above this threshold, there is a characteristic sequence of bifurcations, leading to chaotic dynamics, which implies that the dynamical behavior of the single species model with birth pulses are very complex, including small-amplitude annual oscillations, large-amplitude multi-annual cycles, and chaos. This suggests that birth pulse, in effect, provides a natural period or cyclicity that allowsfor a period-doubling route to chaos. Finally, we discuss the effects of generation delay on stability of positiveequilibrium (or positive periodic solution), and show that generation delay is found to act both as a destabilizing and a stabilizing effect.

Information

Type
Research Article
Copyright
© EDP Sciences, SMAI, 2003

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable