Table 2 Axial analysis of alignment during defecation in all dogs (pooled data or mean vectors of particular dogs sorted into three categories according to the rate of changes of magnetic field declination)
From: Dogs are sensitive to small variations of the Earth’s magnetic field
Pooled raw data | Means per dog (n > 5) | |||||
|---|---|---|---|---|---|---|
Declination rate | 0% | 0.1-2% | >2% | 0% | 0.1-2% | >2% |
Number of observations | 607 | 542 | 744 | 43 | 36 | 39 |
Mean vector (μ) | 176°/356° | 111°/291° | 109°/289° | 173°/353° | 104°/184° | 96°/276° |
Length of mean vector (r) | 0.216 | 0.106 | 0.03 | 0.598 | 0.283 | 0.194 |
Circular standard deviation | 50° | 61° | 76° | 29° | 45° | 52° |
95% Confidence interval (-/+) for μ | 168°-183° | - | - | 164°-182° | 81°-127° | - |
99% Confidence interval (-/+) for μ | 166°-185° | - | - | 161°-185° | 74°-134° | - |
Rayleigh test (Z) | 28.248 | 6.133 | 0.672 | 15.353 | 2.891 | 1.464 |
Rayleigh test (p) | <10-12 | 0.002 | 0.511 | 6.20⋅10-8 | 0.055 | 0.233 |