Oscillations, fluctuation intensity and optimal harvesting of a bio-economic model in a complex habitat

被引：3
|
作者：
Zhang, Xue [1 ,2 ]
Song, Shuni [1 ]
Wu, Jianhong [2 ]
机构：
[1] Northeastern Univ, Coll Sci, Shenyang 110819, Liaoning, Peoples R China
[2] York Univ, York Inst Hlth Res, Ctr Dis Modelling, 4700 Keele St, Toronto, ON M3J 1P3, Canada
来源：
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS | 2016年 / 436卷 / 02期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Hopf bifurcation; Habitat complexity; Time delays; Stochastic behavior; Optimal harvesting; PREDATOR-PREY SYSTEM; HOPF-BIFURCATION; BEHAVIOR; STABILITY; CHOICE;
D O I：
10.1016/j.jmaa.2015.11.068
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
We investigate the effects of habitat complexity and multi-time delays on dynamics of a bio-economic predator prey model. The differential algebraic system theory is applied to transform the bio-economic model into a normal form, so that the local stability and existence of periodic solutions can be examined by varying the delays and the habitat complexity parameter. The direction of Hopf bifurcation and the stability of bifurcated periodic solutions are investigated. We also discuss the effect of fluctuating environment on dynamical behavior of a corresponding stochastic delayed-differential algebraic system and derive expressions for intensities of population fluctuations. The model is also used to study the optimal harvesting strategy in order to maximize economic profit while sustaining the ecosystem. Numerical simulations are designed to illustrate the effectiveness of theoretical analysis. (C) 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码：692 / 717
页数：26
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