Top: de/dt for a 5 M_Jup planet with different eccentricities and inclinations. The values of de/dt have been determined with the formula given in Sect. 3.5. Bottom: same, but for 10 M_Jup. The white line in the figure indicates the transition between eccentricity increase and eccentricity damping. Below the white line, the eccentricity increases, above the line eccentricity decreases. We note the different colour coding as the change is dependent on the planetary mass.