The cylinder end-conditions are specified to model the effect of a wall that may correspond to the flow in a wind tunnel, water channel or a tow-tank experiment with a cylinder having large end-plates. The computations confirm that it is the end conditions for the finite cylinder that determine the mode of vortex shedding (parallel or oblique). The Re=100 and 1000 flows exhibit oblique mode of vortex shedding. The flow for Re=100 is very organized, devoid of any {\it vortex dislocations} and is associated with only one cell along the cylinder span. The flow at Re=1000 is interspersed with vortex dislocations and the vortex shedding angle varies, both, temporally and periodically. The presence of vortex dislocations is responsible for the breakdown of span wise coherence of vortex structures. The arrangement of the stream wise vortex structures resemble the Mode B pattern of vortex shedding. Our computations indicate that the wake transition regime, that is known to occur in the Re range 190-250 for large aspect-ratio cylinders, is either extended and/or delayed for a cylinder of small aspect ratio with "no-slip" walls. Flow at Re=300 results in flow patterns that correspond to the wake transition regime. Mode A and Mode B patterns of vortex shedding in addition to vortex dislocations are observed at different time instants.

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