Electronic Journal of Differential Equations, Vol. 2023 (2023), No. 02, pp. 1-18. Title: Asymptotic stability of a stochastic age-structured cooperative Lotka-Volterra system with Poisson jumps Authors: Mengqing Zhang (North Minzu Univ., Yinchuan, China) Jing Tian (Towson Univ., Towson, MD, USA) Keyue Zou (Southwestern Univ. of Finance and Economics, Chengdu, China) Abstract: In this article, we study a stochastic age-structured cooperative Lotka-Volterra system with Poisson jumps. Applying the M-matrix theory, we prove the existence and uniqueness of a global solution for the system. Then we use an optimized Euler-Maruyama numerical scheme to approximate the solution. We obtain second-moment boundedness and convergence rate of the numerical solutions. The numerical solutions illustrate the theoretical results. Submitted September 10, 2022. Published January 06, 2023. Math Subject Classifications: 35Q30, 35B41, 76D05. Key Words: Cooperative Lotka-Volterra system; age-structured; rate of convergence; Poisson jumps; Euler-Maruyama scheme.