Settlement of the Tropical Box Mussel, Septifer bilocularis: Effects of Site, Position, and Substratum

Table 1

Three-factorial ANOVA, settlement of the box mussel, S. bilocularis, with site, positions in the patch, and substratum as the main effects.

Sources	SS	df	Mean squares	F-ratio	value
Sites	3.457	1	3.457	10.721	0.001
Positions in patches	6.548	2	3.274	10.154	<0.001
Substratum	10.354	3	3.451	10.704	<0.001
Sites  positions in patches	0.133	2	0.067	0.207	0.813^n.s
Sites  substratum	0.421	3	0.140	0.435	0.758^n.s
Positions  substratum	6.663	6	1.045	3.242	0.004
Sites  positions  substratum	0.663	6	0.110	0.342	0.914^n.s
Error	85.129	264	0.322

: ; ; n.s.: not significant.