  The HI content of the Eridanus group of galaxies is studied using the GMRT
observations and the HIPASS data. A significant HI deficiency up to a factor of
2-3 is observed in galaxies in the Eridanus group. The deficiency is found to
be directly correlated with the projected galaxy density and inversely
correlated with the line-of-sight radial velocity. It is suggested that the HI
deficiency is due to tidal interactions. An important implication is that
significant evolution of galaxies can take place in a group environment.
