Table 5.

Mean (± s.e.m.) wing lengths (mm) of males from competition and control experiments.

Experiment	Wild		Laboratory
			irradiated†/un-irradiated
	N	size	N	Size
Competition
1	8	2.47 ± 0.07		n/d
2	47	2.67 ± 0.02b	39	2.88 ± 0.02a†
Control
1	41	2.60 ± 0.02		n/a
2	7	2.75 ± 0.09a	16	2.73 ± 0.02a
3	25	2.74 ± 0.03a	14	2.77 ± 0.04a section A
			25	2.70 ± 0.04a section C
Overall	128	2.65 ± 0.01a	94	2.78 ± 0.02b

N is the number of wings measured. Mean values for wild and laboratory (i.e. irradiated and un-irradiated) males are given. Means without letters in common are significantly different at p < 0.05 for each row. n/d: not determined, n/a: not applicable.