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We compare the physical parameters and the relative abundances calculatedthroughout supernova (SN) and gamma-ray burst (GRB) host galaxies by thedetailed modelling of the spectra. The results show that : 1) shock velocitiesare lower in long period GRB (LGRB) than in SN host galaxies. 2) O/H relativeabundance in SN hosts are scattered within a range 8.0 <12+log(O/H)<8.85 butthey are close to solar in LGRB hosts. N/H are lower than solar for both SN andLGRB. 3) The starburst temperatures within a few SN hosts reach Ts >10^5 K. Tsin LGRB hosts are 3-8 10^4 K. 4) Ha increases with the ionization parameter U.We suggest that SN-host symbiosis is stronger in terms of host galaxy activitythan GRB-host in the range of energies related to the near UV - optical - nearIR spectra.

Physical conditions and element abundances in SN and GRB host galaxies at different redshifts