Table 1 Absolute (Z) and relative (ΔZ: standard deviation units) population divergence for eight morphological traits among 12 Calopteryx populations in southern Sweden

Trait	Z	ΔZ	Sexual selection: mating rate			Natural selection: survival
			S_Klinga2001	S_Klinga2002	S_Höje2002	S_Klinga2001	S_Klinga2002	S_Höje2002
Spot darkness	1.72	1.24	0.116	0.055	−0.203	0.034	−0.006	−0.130 ^†
Forewing spot length	2.25	1.54	0.361 ^†	−0.334 ^*	0.350 ^*	−0.040	−0.018	0.011
Forewing length	1.20	1.51	0.199	−0.016	0.022	−0.155 ^*	0.076	−0.058
Total length	2.93	1.97	−0.297	−0.354 ^*	0.170	−0.198 ^**	−0.159 ^*	−0.060
Abdomen length	2.20	1.74	−0.222	−0.461 ^**	0.027	−0.028	0.099	−0.061
Thorax length	0.32	1.88	−0.038	−0.209	−0.101	0.082	−0.183 ^*	−0.071
Thorax width	0.19	1.54	0.097	0.055	0.416 ^*	0.095	−0.192 ^**	0.022
PC1 (‘Size’)	1.27	1.27	−0.250	−0.106	0.109	0.090	−0.173	−0.075

We also present sexual and natural selection differentials obtained in a field study on two of these populations. All selection gradient with P-values<0.10 are indicated in bold. Symbols:
=P<0.001;
^**=P<0.01;
^*=P<0.05;
^†=P<0.10.

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