Figure 7. The Gaussian relationship (Y = α×exp(−(X−X0)²/2b)) between Pityophthorus juglandis catches and ambient barometric pressure (mbar).

(A) Female: N = 873, F = 33.70, P<0.001, α = 5.60, b = 2.83, X ₀ = 756.90, adj. R ² = 0.84; (B) Male: N = 856, F = 14.73, P<0.01, α = 4.75, b = 4.52, X ₀ = 755.65, adj. R ² = 0.70. Blue □: Outliers; Red ◯: Data points used to fit curves. These points were the greatest values of trap catches from each of the barometric pressure classes [28].