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We present a survey for transient and variable sources, on timescales from 28seconds to $\sim$1 year, using the Murchison Widefield Array (MWA) at 182 MHz.Down to a detection threshold of 0.285 Jy, no transient candidates wereidentified, making this the most constraining low-frequency survey to date andplacing a limit on the surface density of transients of $<4.1 \times 10^{-7}$deg$^{-2}$ for the shortest timescale considered. At these frequencies,emission from Fast Radio Bursts (FRBs) is expected to be detectable in theshortest timescale images without any corrections for interstellar orintergalactic dispersion. At an FRB limiting flux density of 7980 Jy, we find arate of $<$82 FRBs per sky per day for dispersion measures $<$700 pc cm$^{-3}$.Assuming a cosmological population of standard candles, our rate limits areconsistent with the FRB rates obtained by Thornton et al. (2013) if they have aflat spectral slope. Finally, we conduct an initial variability survey ofsources in the field with flux densities $\gtrsim$0.5 Jy and identify nosources with significant variability in their lightcurves. However, we notethat substantial further work is required to fully characterise both the shortterm and low level variability within this field.

Limits on Fast Radio Bursts and other transient sources at 182 MHz using the Murchison Widefield Array