Table 3. Two-way ANOVA for percent motility (A) and sperm speed (B) of Heliocidaris erythrogramma across different pH treatments (fixed) and males (random).

A Percent motility
	df	MS	F	P
pH	2	0.270	24.666	<0.001
Male	18	0.531	48.504	<0.001
pH * Male	36	0.011	1.226	0.176
Residual	509	0.009
B Sperm speed
	df	MS	F	P
pH	2	4.067	0.346	0.710
Male	18	218.547	18.617	<0.001
pH * Male	36	11.739	0.801	0.791
Residual	509	14.654

Significant effects (P≤0.05) are shown in bold.