Table 1.

Summary of three-factorial ANOVA results on the effect of the treatments (grazing, Alexandrium strain identity and culture form) on clonal growth rates. (d.f., degrees of freedom; MQ, mean square; F, test statistic; p, level of significance.)

	d.f.	MQ	F	p
grazing (yes/no)	1	2.366040	271.1199	<0.000001
strain (Alex2, Alex4, Alex5)	2	0.918121	105.2057	<0.000001
culture form (monoclonal culture/mixed culture)	1	2.648118	303.4428	<0.000001
grazing × strain	2	0.956716	109.6282	<0.000001
grazing × culture form	1	3.086409	353.6656	<0.000001
strain × culture form	2	0.718774	82.3630	<0.000001
grazing × strain × culture form	2	0.728015	83.4219	<0.000001
	30	0.008727