Global attractivity in a "food-limited" population model with impulsive effects

Sufficient conditions are obtained for the global attractivity of the positive equilibrium of the delay-logistic equation with impulsive effect N(t) = r(t)N(t)[K-N-p(t-tau)/K+c(t)N-p(t-tau)], N(tau(k)(+))=N(tau(k))exp(I-k(ln(N(tau(k))/(p)rootK))), where r (t), c(t) are continuous functions, p, K, tau are positive constants, and {tau(k)}(infinity)(k=1) denotes the sequence of impulsive time which assumed to be strictly increasing. Some special cases are also considered. (C) 2004 Elsevier Inc. All rights reserved.