The Neutral Hydrogen Properties of Galaxies in Gas-rich Groups

The majority of galaxies in the local Universe lie within a group environment - thus it is important to understand the group environmental impact on galaxy evolution. Our multi-wavelength survey of Choir groups probes low mass, gas-rich, late-type dominated groups with one or two giant spirals and a number of dwarf galaxies. These groups are reminiscent of (though more gas-rich) our local group. In this talk I will reveal the neutral hydrgogen (HI) content in the Choir groups. I will show that the majority of galaxies in these groups are gas-rich and that those in non-interacting groups are dominated by their internal galaxy properties rather than the group environment. Only a couple of galaxies are gas-poor which is most likely due to tidal interactions. To place Choir groups in the larger scale context, I will present detailed analysis of two extreme groups: an isolated Choir group, and a cluster infalling Choir group.