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Table 3 Spatio-temporal patterns of environmental covariates of variability in GIN transmission risk on Alberta pasture between 2008 and 2010

From: Where’s the risk? Landscape epidemiology of gastrointestinal parasitism in Alberta beef cattle

Parameter Polygon Mean ± SEM ANOVA
2008 2009 2010
GDD Total (base 5 °C) 8 867.5 ± 10.0 979.5 ± 46.5 865.1 ± 35.0 F735,2 = 3.8
10 814.5 ± 31.7 852.4 ± 28.2 803.2 ± 12.4 F996,2 = 1.0
12 795.8 799.6 726.2 -
13 749.2 769.6 663.3 -
14 865.7 ± 21.0 902.9 ± 28.1 804.9 ± 15.6 F729,2 = 4.9
15 937.6 ± 18.6 950.4 ± 18.0 855.0 ± 15.4 F4788,2 = 8.9***
18 881.8 ± 25.0 892.2 ± 22.7 812.1 ± 23.1 F673,2 = 3.4
19 875.4 ± 17.5 893.6 ± 13.2 803.2 ± 12.4 F1104,2 = 10.8**
Acc. Precip. (mm) 8 98.6 ± 8.0 204.4 ± 32.7 158.8 ± 28.3 F735,2 = 4.4
10 181.4 ± 10.3 137.2 ± 12.0 178.2 ± 13.9 F996,2 = 5.3*
12 175.8 190.3 174.3 -
13 181.3 206.6 285.2 -
14 144.6 ± 16.5 190.3 ± 7.4 271.7 ± 16.5 F729,2 = 20.7*
15 127.46 ± 7.5 183.4 ± 7.1 217.3 ± 8.5 F4788,2 = 34.4***
18 113.3 124.1 ± 9.8 208.0 ± 21.6 -
19 114.9 ± 12.3 120.0 ± 6.8 210.9 ± 21.8 F1104,2 = 13.0**
Maximum Temp. (°C) 8 20.8 ± 0.4 19.6 ± 0.6 19.0 ± 0.4 F735,2 = 3.5*
10 19.3 ± 0.32 18.5 ± 0.5 17.8 ± 0.3 F996,2 = 3.5*
12 18.7 ± 0.6 17.8 ± 0.8 17.4 ± 0.6 F366,2 = 1.0
13 18.7 ± 0.6 17.7 ± 0.8 16.7 ± 0.4 F489,2 = 3.6*
14 18.9 ± 0.4 17.8 ± 0.6 17.1 ± 0.4 F729,2 = 3.4*
15 19.8 ± 0.2 18.9 ± 0.2 18.0 ± 0.2 F4788,2 = 22.9***
18 19.4 ± 0.4 18.5 ± 0.4 17.5 ± 0.3 F673,2 = 5.4**
19 19.2 ± 0.3 18.5 ± 0.4 17.5 ± 0.3 F1104,2 = 6.6***
Minimum Temp. (°C) 8 4.1 ± 0.4 4.6 ± 0.4 4.5 ± 0.3 F735,2 = 0.7
10 3.2 ± 0.3 3.0 ± 0.3 3.3 ± 0.3 F996,2 = 0.3
12 3.3 ± 0.5 2.8 ± 0.5 3.4 ± 0.5 F366,2 = 0.4
13 2.3 ± 0.5 2.9 ± 0.5 3.0 ± 0.3 F489,2 = 0.8
14 4.6 ± 0.4 4.8 ± 0.4 5.2 ± 0.3 F729,2 = 0.7
15 4.5 ± 0.1 4.8 ± 0.2 5.2 ± 0.1 F4788,2 = 6.5**
18 4.0 ± 0.4 4.7 ± 0.3 5.4 ± 0.2 F673,2 = 4.6**
19 4.1 ± 0.3 3.8 ± 0.3 4.5 ± 0.2 F1104,2 = 2.1
  1. *p < 0.05; **p < 0.01; ***p < 0.001