Table 3. F-tests and regression coefficients for relationships between imported fire ant mound and surrounding area temperature measurements and time [percentage of day (x) between sunrise and sunset] at three Mississippi study sites.
| F-test for quadratic trend | ||||||
|---|---|---|---|---|---|---|
| Site ID | Dependent variable | Date | df | F | P | Equation |
| Nobile | Mound temp | Spring | 2, 423 | 18.31 | < 0.0001 | y = −1.50 (±2.64) + 0.74 (±0.13) x – 0.007 (±0.001) x2 |
| Fall | 2, 423 | 58.53 | < 0.0001 | y = 10.23 (±3.62) + 1.48 (±0.15) x – 0.013 (±0.001) x2 | ||
| Surrounding temp | Spring | 2, 423 | 13.23 | < 0.0001 | y = −0.66 (±2.65) + 0.62 (±0.13) x – 0.006 (±0.001) x2 | |
| Fall | 2, 423 | 58.53 | < 0.0001 | y = 12.03 (±3.54) + 1.30 (±0.14) x – 0.012 (±0.001) x2 | ||
| Clay | Mound temp | Spring | 2, 423 | 91.57 | < 0.0001 | y = 15.62 (±1.93) + 1.08 (±0.08) x – 0.010 (±0.001) x2 |
| Fall | 2, 423 | 71.49 | < 0.0001 | y = −3.87 (±2.26) + 1.17 (±0.1.) x – 0.011 (±0.001) x2 | ||
| Surrounding temp | Spring | 2, 423 | 47.75 | < 0.0001 | y = 15.92 (±1.89) + 0.77 (±0.08) x – 0.007 (±0.001) x2 | |
| Fall | 2, 423 | 44.29 | < 0.0001 | y = −2.86 (±2.22) + 0.92 (±0.10) x – 0.009 (±0.001) x2 | ||
| Levee | Mound temp | Spring | 2, 423 | 16.27 | < 0.0001 | y = 8.36 (±2.73) + 0.77 (±0.14) x – 0.007 (±0.002) x2 |
| Fall | 2, 423 | 93.49 | < 0.0001 | y = 2.25 (±2.59) + 1.42 (±0.10) x – 0.012 (±0.001) x2 | ||
| Surrounding temp | Spring | 2, 423 | 1.83 | 0.1614 | Not significant | |
| Fall | 2, 423 | 76.47 | < 0.0001 | y = 3.96 (±2.62) + 1.29 (±0.10) x – 0.011 (±0.001) x2 | ||