The distribution of the N/O element abundance ratios calculated by the detailed modelling of different galaxy spectra at z1 and z~0.1 following the N/H trend and reach the characteristic N/O ratios calculated for the H II regions in local and nearby galaxies. The few short-period gamma-ray-burst (SGRB) hosts included in the galaxy sample show N/H<=0.04 solar and O/H solar. They seem to continue the low bound N/H trend of SN hosts at z<0.3. The distribution of N/O as a function of metallicity for SN and LGRB hosts is compared with star chemical evolution models. The results show that several LGRB hosts can be explained by star multibursting models when 12+log(O/H)<8.5, while some objects follow the trend of continuous star formation models. N/O in SN hosts at log(O/H)+128.5 many different objects are nested close to O/H solar with N/O ranging between the maximum corresponding to starburst galaxies and AGN and the minimum corresponding to HII regions and SGRB.

Cone search capability for table J/MNRAS/469/3125/table1 (Modelling line ratios to H{beta}=1 from the CALIFA HII regions (Marino et al., 2013, Cat. J/A+A/559/A114))

Cone search capability for table J/MNRAS/469/3125/table3 (Modelling line ratios to H{beta}=1 from the HII regions of Berg et al. (2012ApJ...754...98B))

Cone search capability for table J/MNRAS/469/3125/table5 (Modelling line ratios to H{beta}=1 of AGN spectra at z<=0.1 (Dors et al. 2017MNRAS.468L.113D))

Cone search capability for table J/MNRAS/469/3125/table7 (Modelling line ratios to H{beta}=1 of Type I SN host spectra at z<=0.03 (Gallagher et al., 2005ApJ...634..210G))