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Table 3 Odds ratios (OR) and AICs for the best fitting linear models describing the effects of rainfall anomaly, temperature anomaly and “ENSO drought/wet” factor on bird number of five waterfowl species

From: Avian influenza infection dynamics under variable climatic conditions, viral prevalence is rainfall driven in waterfowl from temperate, south-east Australia

Time-lag class Region Species Rainfall anomaly OR Temperature anomaly OR “ENSO drought/wet” OR AIC
3 WTP Chestnut Teal 1.23 0.65* 0.83 95.25
4 WTP Chestnut Teal 1.22 0.63** 0.82 94.06
6 VIC Chestnut Teal 1.03 1.45* 1.02 100.44
7 VIC Chestnut Teal 0.97 1.48* 1.07 99.94
8 VIC Chestnut Teal 0.85 1.44* 1.17 100.34
SE Chestnut Teal
12 MDB Chestnut Teal 0.49* 0.60* 1.40 99.68
1 WTP Australian Shelduck 1.09 0.64* 1.11 95.18
2 WTP Australian Shelduck 1.27 0.70* 1.04 95.20
3 WTP Australian Shelduck 1.25 0.69* 1.05 94.75
VIC Australian Shelduck
SE Australian Shelduck
4 MDB Australian shelduck 1.94* 1.65* 0.99 96.13
5 MDB Australian Shelduck 1.81* 1.74* 1.05 95.18
4 WTP Pacific black Duck 1.12 0.63* 0.85 96.20
5 WTP Pacific black Duck 1.26 0.68* 0.81 96.24
6 WTP Pacific black Duck 1.27 0.67* 0.81 95.87
6 VIC Pacific black Duck 1.01 1.48* 1.02 99.89
7 VIC Pacific black Duck 0.90 1.53* 1.11 98.52
8 VIC Pacific black Duck 0.77 1.49* 1.24 98.63
SE Pacific black Duck
1 MDB Pacific black Duck 0.77 0.58** 1.00 95.08
2 MDB Pacific black Duck 0.83 0.56** 0.94 95.08
12 WTP Grey Teal 0.81 0.52*** 0.73 76.85
11 VIC Grey Teal 0.63 0.61** 0.97 84.59
12 VIC Grey Teal 0.74 0.58*** 0.85 83.29
11 SE Grey Teal 0.57* 0.60*** 0.99 84.38
12 SE Grey Teal 0.65 0.56*** 0.86 82.86
11 MDB Grey Teal 0.34*** 0.51*** 1.23 83.39
12 MDB Grey teal 0.37*** 0.48*** 1.10 84.71
11 WTP Pink-eared Duck 0.60* 0.60*** 0.96 80.33
9 VIC Pink-eared Duck 0.42*** 0.66*** 1.32 72.29
9 SE Pink-eared Duck 0.38*** 0.70** 1.40 74.99
9 MDB Pink-eared Duck 0.32*** 0.69* 1.44 79.13
  1. An OR > 1 indicates a positive, whereas an OR < 1 indicates a negative effect of the explanatory variable (e.g. OR > 1 means that bird numbers were higher when rainfall anomaly was higher and OR < 1 means that bird numbers were higher when rainfall anomaly was lower). Regions: WTP (Western Treatment Plant), Victoria (VIC), South-eastern Australia (SE) and Murray–Darling Basin (MDB). Stars indicate significance levels: ***p < 0.001; **p < 0.01; *p < 0.05. Empty cells indicate that the models were not significant for that region and species, thus best models could not been selected.