Temperature is a common climatic descriptor of lachryphagous activity period in Phortica variegata (Diptera: Drosophilidae) from multiple geographical locations

Table 2 Kendallʼs rank correlation of climatic variables versus Phortica variegata males referred to the day of sampling

Site	Variable	Valid n	Kendall’s tau b	P-value
All sites	Day length	76	0.021	0.80
	Maximum temperature	75	0.45	< 0.0001
	Minimum temperature	75	0.40	< 0.0001
	Mean temperature	75	0.43	< 0.0001
	Mean wind speed	73	0.17	0.044
	Barometric pressure	76	− 0.25	0.003
	Relative humidity^a	55	− 0.23	0.014
Manziana	Day length	17	− 0.16	0.44
	Maximum temperature	16	0.30	0.15
	Minimum temperature	16	0.15	0.025
	Mean temperature	16	0.34	0.10
	Mean wind speed	17	-0.40	0.039
	Barometric pressure	17	0.13	0.53
	Relative humidity	7	0.59	0.10
Oliveto Lucano	Day length	17	0.27	0.16
	Maximum temperature	17	0.58	0.002
	Minimum temperature	17	0.39	0.041
	Mean temperature	17	0.47	0.015
	Mean wind speed	17	− 0.15	0.44
	Barometric pressure	17	− 0.08	0.70
	Relative humidity	17	− 0.07	0.74
El Escorial	Day length	17	0.30	0.10
	Maximum temperature	17	0.57	0.002
	Minimum temperature	17	0.48	0.008
	Mean temperature	17	0.59	0.001
	Mean wind speed	14	− 0.16	0.47
	Barometric pressure	17	0.35	0.057
	Relative humidity	16	− 0.39	0.042
New Forest	Day length	10	0.18	0.60
	Maximum temperature	10	0.55	0.07
	Minimum temperature	10	0.22	0.51
	Mean temperature	10	0.44	0.15
	Mean wind speed	10	− 0.11	0.80
	Barometric pressure	10	− 0.11	0.80
	Relative humidity	na	na	na
Highland Park	Day length	15	0.24	0.25
	Maximum temperature	15	0.56	0.006
	Minimum temperature	15	0.76	0.0002
	Mean temperature	15	0.52	0.010
	Mean wind speed	15	0.06	0.80
	Barometric pressure	15	− 0.18	0.39
	Relative humidity	15	0.08	0.73

^aNew Forest data not available
Notes: Day length recorded as % of light in 24 hours; temperature recorded as °C; wind speed recorded as m/s; pressure recorded as hPa; humidity recorded as %. Italic highlights the variables with significant correlations (P-value < 0.05)
Abbreviations: Valid n, records used in the statistics; Kendallʼs tau b, correlation value; P-value, two-sided significance level of the b-statistics; na, data not available