05-28【袁 沅】管理楼1418 研究生教育创新计划高水平学术前沿系列报告

发布者:石艳慈发布时间:2024-05-27浏览次数:12

报告人:袁沅教授 纽芬兰纪念大学


时间:2024.5.28下午 2:30-3:30


地点:管理楼1418


题目:A STAGE-STRUCTURED MATHEMATICAL MODEL FOR FISH STOCK WITH HARVESTING


摘要:In this talk, we propose a mathematical model for a single species fish stock with a three stage structure: Juveniles, small adults, and large adults with two harvesting strategies for mature classes, maturity, and size selectivities. The purpose of the work is to investigate the dynamical behavior of the model and discuss the effect of harvesting. We identify the adult reproduction number RA for the model; obtain the local and global stability of the trivial equilibrium when RA < 1; and discuss the population persistence and existence of a unique positive equilibrium when RA > 1. Numerical simulations are provided to investigate the influence of harvesting functions, discuss the optimal harvesting rates, and explore the effect of periodic coefficients on the dynamical system.