Table 1.

Comparisons of the mean (± s.e.m.) number of sperm between the left and right palp, between the used and unused palp for the first insertion, as well as between the number of males that used the left or right palp for the first copulation and between the number of males that used the palp with more or less sperm.

		A. versicolor	H. multipuncta	L. decorata	N. malabarensis	N. pilipes
No. of sperm in left and right palps	Left	72,683 ± 12,608	63,864 ± 6,149	6,356 ± 1,310	89,380 ± 7,363	311,342 ± 88,449
	Right	42,458 ± 6,644	72,364 ± 13,493	5,094 ± 1,131	107,720 ± 11,399	364,867 ± 82,471
	Paired t test	t17 = 1.75	t10 = −0.27	t16 = 0.80,	t27 = −1.58	t11 = −0.86
	N	18	11	17	28	12
	p	0.098	0.796	0.436	0.126	0.410
No. of sperm in used and unused palps	Used	78,925 ± 10,826	77,950 ± 9,411	6,694 ± 1,056	111,673 ± 10,864	370,738 ± 95,674
	Unused	36,217 ± 7,690	58,277 ± 10,751	4,756 ± 1,347	85,427 ± 7,719	306,221 ± 73,988
	Paired t test	t17 = 3.68	t10 = 2.41	Z = −2.77	t27 = 3.13	t11 = 0.92
	N	18	11	17	28	12
	p	0.002	0.037	0.006	0.004	0.379
No. of males used left or right palp	Left	13	5	9	9	5
	Right	5	6	8	19	7
	Chi-square test	χ²1 = 3.56	χ²1 = 0.09	χ²1 = 0.06	χ²1 = 3.57	χ²1 = 0.33
	N	18	11	17	28	12
	p	0.059	0.763	0.808	0.059	0.564
No. of males used the palp with more or less sperm	More	15	9	15	22	10
	Less	3	2	2	6	2
	Chi-square test	χ²1 = 8.00	χ²1 = 4.46	χ²1 = 9.94	χ²1 = 9.14	χ²1 = 5.33
	N	18	11	17	28	12
	p	0.005	0.035	0.002	0.002	0.021