Top: specific total torque evolution acting on planets (20 M_Earth) embedded in discs with different disc masses. The planets embedded in the higher mass discs M_Disc > 0.02 M_⊙ are in the convective zone in the disc, so that the torque acting on the planet is very noisy compared to the low-mass discs. Bottom: radial torque density Γ(r) acting on the planet embedded in a disc with M_disc = 0.04 M_⊙ at different stages of the evolution.