Gas and star velocity dispersions have been derived for eight circumnuclear star-forming regions ( CNSFRs ) and the nucleus of the spiral galaxy NGC 3310 using high resolution spectroscopy in the blue and far red . Stellar velocity dispersions have been obtained from the Ca ii triplet in the near-IR , using cross-correlation techniques , while gas velocity dispersions have been measured by Gaussian fits to the H \beta \lambda 4861 Å and [ O iii ] \lambda 5007 Å emission lines . The CNSFRs stellar velocity dispersions range from 31 to 73 km s ^ { -1 } . These values , together with the sizes measured on archival HST images , yield upper limits to the dynamical masses for the individual star clusters between 1.8 and 7.1 \times 10 ^ { 6 } M _ { \odot } , for the whole CNSFR between 2 \times 10 ^ { 7 } and 1.4 \times 10 ^ { 8 } M _ { \odot } , and 5.3 \times 10 ^ { 7 } M _ { \odot } for the nucleus inside the inner 14.2 pc . The masses of the ionizing stellar population responsible for the H ii region gaseous emission have been derived from their published H \alpha luminosities and are found to be between 8.7 \times 10 ^ { 5 } and 2.1 \times 10 ^ { 6 } M _ { \odot } for the star-forming regions , and 2.1 \times 10 ^ { 5 } M _ { \odot } for the galaxy nucleus ; they therefore constitute between 1 and 7 per cent of the total dynamical mass . The ionized gas kinematics is complex ; two different kinematical components seem to be present as evidenced by different line widths and Doppler shifts .