Electronic Journal of Differential Equations,
Vol. 2003(2003), No. 121, pp. 1-9.

Title: Optimal impulsive harvest policy for time-dependent logistic 
       equation with periodic coefficients

Authors: Ling Bai (Jilin Univ., China)
         Ke Wang (Northeast Normal Univ., Jilin, China)

Abstract: 
  We study a time-dependent logistic equation with periodic coefficients.
  First, we show that the impulsive harvest population equation has
  impulsive periodic solutions for constant effort harvest and for
  proportional harvest. Second, we investigate the  optimal harvest
  effort that maximizes the sustainable yield per unit of time.
  Then we determine the corresponding optimal population levels.
  Our results generalize the results presented in [10].

Submitted March 4, 2003. Published December 9, 2003.
Math Subject Classifications: 92D25, 34A37.
Key Words: Impulsive harvest equation; global attractor;
           optimal impulsive harvest policy