Table 2.

Type of marine macrofouling organisms settled on substrates immersed in seawater. Ranking of the intensity and severity factors.

Surface covered by fouling (%)	Rank for intensity factor (I)	Type of fouling	Rank for severity factor (G)
No fouling	0	Biofilm	1
Up to 10%	1	Algae	3
From 10% to 20%	2	Non-encrousting species	4
From 20% to 40%	3	Encrouting species	6
From 40% to 60%	4
From 60% to 100%	5

The data of antifouling performance were ranked from the best to the poorest, and the significance test was conducted using one-way ANOVA method.