  In this paper, we clarify the strong relationship between Myrberg type
dynamics and the ergodic properties of the geodesic flows on (not necessarily
compact) uniform visibility manifolds without conjugate points. We prove that
the positivity of the Patterson-Sullivan measure of the Myrberg limit set is
equivalent to the conservativity of the geodesic flow with respect to the
Bowen-Margulis-Sullivan measure. Moreover we show that the Myrberg limit set is
a full Patterson-Sullivan measure subset of the conical limit set. These
results extend the classical works of P. Tukia and B. Stratmann from hyperbolic
manifolds to the manifolds without conjugate points.
