Appendix:
Figure S1: Numbers of predator photographs obtained per camera night (means ± SE) over two years from twenty-five remote cameras (24 Moultrie i40 and one Reconyx RapidFire) set in the Simpson Desert, central Australia. The two-year study followed predator populations before, during and after an irruption in their rodent prey.
Figure S2: Histograms showing the proportions of remote camera photographs taken within 500 minutes with time between reccurring photographs of (a) red fox, (b) feral cat and (c) dingo at the same camera trapping location, Simpson Desert, central Australia. Twenty-five Remote cameras (24 Moultrie i40 and one Reconyx RapidFire) were active from April 2010 to April 2012 and downloaded 34 times a year. Bin size 0, 1, 2, 3, 10, 100, 200, 500 minutes. A two minute break point was chosen to assume independence between individual photographs based on these results.
Figure S3: Numbers of rodent photographs (four species, pooled; solid line) obtained per camera night (means ± SE) over two years from twenty-five remote cameras (24 Moultrie i40 and one Reconyx RapidFire) and live-trapping captures (means ± SE per 100 trap nights; dashed line) in the Simpson Desert, central Australia. Rodents comprised the long-haired rat, Rattus villosissimus, sandy inland mouse Pseudomys hermannsburgensis, spinifex hopping mouse, Notomys alexis and house mouse Mus musculus. Both datasets were used to estimate the timing of prey population phases.
Table S1: GLM parameter estimates for numbers of detections of animals in photographs obtained during remote camera trapping of the dingo, red fox and feral cat in the Simpson Desert, central Australia. Cameras were active for two years and photographs pooled per population phase. Phase is the population phase of prey (bust, boom or decline).
Dingo-fox interaction
Dingo / 0.02 / 0.004 / 4.49 / <0.01
Phase bust / -0.22 / 0.03 / -6.83 / <0.01
Phase decline / -0.41 / 0.03 / -14.12 / <0.01
Dingo × Phase bust / -0.36 / 0.008 / -43.65 / <0.01
Dingo × Phase decline / -0.03 / 0.004 / -7.89 / <0.01
Dingo-cat interaction
Dingo / -0.02 / 0.004 / -4.80 / <0.01
Phase bust / -0.54 / 0.03 / -16.82 / <0.01
Phase decline / -0.37 / 0.03 / -13.12 / <0.01
Dingo × Phase bust / -0.06 / 0.006 / -9.24 / <0.01
Dingo × Phase decline / 0.001 / 0.004 / 0.270 / 0.79
Fox-cat interaction
Fox / 0.02 / 0.002 / 11.09 / <0.01
Phase bust / -1.00 / 0.03 / -33.14 / <0.01
Phase decline / -0.53 / 0.03 / -16.06 / <0.01
Dingo × Phase bust / 0.06 / 0.003 / 19.87 / <0.01
Dingo × Phase decline / 0.03 / 0.003 / 10.40 / <0.01
Table S2: GLM parameter estimates with outliers removed for numbers of detections of animals in photographs obtained during remote camera trapping of the dingo, red fox and feral cat in the Simpson Desert, central Australia. Cameras were active for two years and photographs pooled per population phase. Phase is the population phase of prey (bust, boom or decline).
Dingo-fox interaction
Dingo / 0.02 / 0.004 / 4.43 / <0.01
Phase bust / -0.22 / 0.03 / -6.71 / <0.01
Phase decline / -0.41 / 0.03 / -13.66 / <0.01
Dingo × Phase bust / -0.36 / 0.008 / -43.32 / <0.01
Dingo × Phase decline / -0.03 / 0.006 / -4.83 / <0.01
Dingo-cat interaction
Dingo / -0.02 / 0.004 / -4.76 / <0.01
Phase bust / -0.54 / 0.03 / -16.68 / <0.01
Phase decline / -0.31 / 0.03 / -10.55 / <0.01
Dingo × Phase bust / -0.06 / 0.006 / -9.17 / <0.01
Dingo × Phase decline / -0.03 / 0.006 / -5.86 / <0.01