The model of gravitational fragmentation as a result of disc instability offers an alternate formation mechanism for gats giant planets on wide orbits. A gravitationally unstable disc can fragment into self-gravitating clumps which have the potential to evolve further into protoplanets on a dynamical timescale. We model the evolution of gravitationally unstable discs and determine the effect of different barotropic equation of states (which broadly correspond to different physical conditions, e.g. disc metallicity, magnetic fields) on the properties of young protoplanets that are still embedded in their host discs.