Almost periodic solutions for a discrete fishing model with feedback control and time delays

• We study the persistence of a discrete fishing model with feedback control and time delays.
• We study the existence, uniqueness and global attractivity of almost periodic solution of the model.
• The main results in our paper extend and improve previous results.

In this paper, we discuss an almost periodic discrete fishing model with feedback control and time delays of the formx(n+1)=x(n)expa(n)1+x(n-σ)K(n)r-b(n)-c(n)u(n-τ),Δu(n)=-α(n)u(n)+β(n)x(n-μ),where σ, τ and μ are nonnegative integers. By means of an almost periodic functional hull theory, sufficient conditions are established for the existence and uniqueness of globally attractive almost periodic solution to the above system. Three examples and numerical simulations are given to illustrate the effectiveness of our main results.