  In light of recent renewed interest in streaks in turbulent jets, the current
work explores their coexistence with vortex rings in the near field of
turbulent round jets. A Reynolds number, $Re=1.5 \times 10^5$ jet is studied at
two diameters downstream of the nozzle, using high-speed stereo particle image
velocimetry. The spectra of individual velocity components reveal radially
localized signatures of the large scale structures. The radial shapes of the
spectral proper orthogonal decomposition modes corresponding to the signatures,
confirm the presence of high speed streaks in the outer edge of the jet at low
Strouhal number, $St \rightarrow 0$. The vortex rings and streamwise vortices
are found to occur in the shear layer at $St \approx 0.49$, where they convect
together as a system and feed the streaks. The role of vortex rings in the
existence of streaks is then studied by strengthening the rings through
axisymmetric excitation. The streaks are observed to persist, retaining their
shapes and show only slight changes in their energies.
