Table 2. Ocean acidification effects on sperm speed and percent sperm motility for each male Heliocidaris erythogramma.

		Sperm speed (µm s−1)			Percent motility (%)
pH		7.6	7.8	8.1	7.6	7.8	8.1
Male	Site
A	1	36.19	33.80	33.64	23.12	20.88	23.29
B	1	37.67	36.72	36.48	36.62	35.94	46.27
C	1	37.11	35.72	36.47	45.13	48.34	56.16
D	1	37.79	39.11	38.40	53.24	54.55	54.61
E	2	35.91	37.16	38.27	26.91	22.38	32.45
F	2	42.85	42.12	42.87	51.21	43.08	57.13
G	2	37.32	38.06	38.27	36.41	38.35	51.37
H	2	44.75	44.99	44.38	43.70	45.44	51.38
I	2	38.33	39.66	39.44	29.96	32.84	36.63
J	1	37.57	36.29	39.87	41.30	40.99	48.96
K	1	40.92	42.43	41.35	59.93	62.42	64.89
L	1	39.29	39.61	40.34	37.64	46.39	50.70
M	1	36.03	37.65	37.45	30.52	31.44	28.87
N	2	39.54	40.24	38.63	58.68	65.98	66.68
O	2	34.67	35.95	35.99	44.32	51.03	54.79
P	2	37.57	36.33	33.66	56.66	53.40	62.93
Q	2	41.18	41.32	39.19	53.23	60.35	57.81
R	1	35.76	34.14	34.64	70.00	68.86	74.13
S	1	41.88	41.54	38.40	45.40	53.60	56.64
mean		38.56	38.60	38.33	44.58	46.25	51.50
S.E.		0.32	0.32	0.36	1.08	1.17	1.10
P between sites		0.348	0.194	0.388	0.761	0.946	0.965

Significant differences in parameters between sites (P≤0.05) are shown in bold.