Electronic Journal of Differential Equations,
Vol. 2007(2007), No. 88, pp. 1-7.

Title: Periodic solutions for a stage-structure ecological model 
       on time scales

Author: Kejun Zhuang (Anhui Univ., Bengbu, Anhui, China)

Abstract:
 In this paper, by using the Mawhin's continuation theorem,
 we prove the existence of periodic solutions for a stage-structure
 ecological model on time scales. This unifies the results for
 differential and difference equations.
  
Submitted April 9, 2007. Published June 15, 2007.
Math Subject Classifications: 92D25, 34C25.
Key Words: Time scales; stage-structure; coincidence degree; 
           periodic solutions.