  We have carried out a comparative analysis of the properties of dark matter
halos in N-body and hydrodynamical simulations. We analyze their density
profiles, shapes and kinematical properties with the aim of assessing the
effects that hydrodynamical processes might produce on the evolution of the
dark matter component. The simulations performed allow us to reproduce dark
matter halos with high resolution, although the range of circular velocities is
limited. We find that for halos with circular velocities of $[150-200] km
s^{-1}$ at the virial radius, the presence of baryons affects the evolution of
the dark matter component in the central region modifying the density profiles,
shapes and velocity dispersions. We also analyze the rotation velocity curves
of disk-like structures and compare them with observational results.
