Association Journal of CSIAM
Supervised by Ministry of Education of PRC
Sponsored by Xi'an Jiaotong University
ISSN 1005-3085  CN 61-1269/O1

Chinese Journal of Engineering Mathematics ›› 2023, Vol. 40 ›› Issue (4): 634-646.doi: 10.3969/j.issn.1005-3085.2023.04.009

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Dynamics of Stochastic Nicholson Model with Patch Structure and Multiple Delays

LIU Rong1,  ZHANG Fengqin2   

  1. 1. School of Applied Mathematics, Shanxi University of Finance and Economics, Taiyuan 030006;
    2. School of Mathematics and Information Technology, Yuncheng University, Yuncheng 044000
  • Received:2022-01-28 Accepted:2022-06-24 Online:2023-08-15 Published:2023-10-15
  • Contact: F. Zhang. E-mail address: zhafq@263.net
  • Supported by:
    The National Natural Science Foundation of China (12071418; 12001341).

Abstract:

The stochastic Nicholson model with patch structure and multiple delays is considered. Firstly, the existence of a unique global positive solution is established by constructing a proper Lyapunov function. Next, by constructing suitable stochastic Lyapunov functions, and using Chebyshev inequality, Borel-Cantelli lemma and exponential martingale inequality, the properties of the solution, such as stochastic ultimate boundedness and non-positivity of sample Lyapunov exponents, etc., are studied. Then, under the condition that all time delays are equal, the sufficient conditions for the extinction of species in each patch are given by using the Burkholder-Davis-Gundy inequality and a strong law of large numbers. Finally, some numerical results are presented, which shows that the interaction between patches has the advantage of population survival, and the greater the time delay, the slower the extinction of species. The results generalize and improve the previous related results, such as removing the condition of the existence and uniqueness theorem of global positive solutions and narrowing the boundary of the sample Lyapunov exponents in related literature.

Key words: stochastic Nicholson model, patch structure, multiple delays, Lyapunov function, extinction

CLC Number: