Table 1: Regression functions of foraging activities of Halictus scabiosae. Fout and Fin: outgoing and incoming foraging activity (per nest and per 30 minutes observation session); F=(Fout+Fin)/2; t: daytime in hours; Tamb, ambient temperature in °C; a–d: regression coefficients, r: correlation coefficient. *Additional virtual values (marked with +) were introduced for the calculation of the regression function.

LineHalictus scabiosaeRegressionDayabcdrnP
reference

1Figure 4(c1)Fout=a*t2+b*t+c1−0.1453.230−16.5170.84412.004
2Figure 4(d1)Fin=a*t2+b*t+c1−0.1593.576−18.4860.90112+2<.001

3Figure 4(c2)Fout=a*t2+b*t+c2−0.1102.531−13.6010.74213.033
4Figure 4(d2)Fin=a*t2+b*t+c2−0.1082.556−14.3390.74213.033

5Figure 4(c3)Fout=a*t2+b*t+c30.053−1.80920.100−71.4500.76112+3 * .014
6Figure 4(d3)Fin=a*t2+b*t+c30.058−1.96521.777−77.3580.66913+2 * .048

7Figure 5(a)F=a·t3+b  t2+c·t  +d1–30.0022−0.0770.704−0.7430.94015<.001

8Fout=a*Tamb+b10.0200.5920.08711.800
9Fout=a*Tamb+b20.0050.4880.04511.893
10Fout=a*Tamb+b3−0.0792.9140.36311+2 * .223

11all dayFout=a*Tamb+b1–30.0240.10890.13939.396
12pre-noonFout=a*Tamb+b1–30.107−1.45230.61515.015
13Tamb=a·t+b1–31.23912.3920.68039<.001

14Fin=a*Fout+b1–30.1520.8780.826988<.001