> 0. Recently, Baillon and Clement [3] established mean ergodic theorems for solutions of nonlinear Volterra equations in Hilbert space. In the present paper, we study the asymptotic behavior of solutions of (1.1) by using nonlinear ergodic theorems. The first mean ergodic theorem was given by Baillon [l] and it was improved by several authors [3, 8, 141. 163