HI properties of nearby galaxies from a volume-limited sample

We consider global HI and optical properties of about three hundred nearby galaxies with V-0 < 500 kms(-1). The majority of them have individual photo metric distance estimates. The galaxy sample parameters show some known and some new correlations implying a meaningful dynamic explanation: 1) In the whole range of diameters, 1 - 40 Kpc, the galaxy standard diameter and rot ational velocity follows a nearly linear Tully-Fisher relation, logA(25) pr oportional to (0.99 +/- 0.06)logV(m). 2) The HI mass-to-luminosity ratio an d the HI mass-to-"total" mass (inside the standard optical diameter) ratio increase systematically from giant galaxies to-wards dwarfs, reaching maxim um values 5 M-circle dot/L-circle dot and 3, respectively. 3) For all the L ocal Volume galaxies their total mass-to-luminosity ratio lies within a ran ge of [0.2-16] M-circle dot/L-circle dot with a median of 3.0 M-circle dot/ L-circle dot. The M-25/L ratio decreases slightly from giant towards dwarf galaxies. 4) The M-HI/L and M(2)5/L ratios for the sample galaxies correlat e with their mean optical surface brightness, which may be caused by star f ormation activity in the galaxies. 5) The M-HI/L and M-25/L ratios are prac tically independent of the local mass density of surrounding galaxies withi n the range of densities of about six orders of magnitude. 6) For the LV ga laxies their HI mass and angular momentum follow a nearly linear relation: logM(HI) proportional to (0.99 +/- 0.04)log(V-m . A(25)), expected for rota ting gaseous disks being near the threshold of gravitational instability, f avourable for active star formation.