PAB, defined as those that remained on a 3.0 mm pore
size Nuclepore filter and FLB, defined as those that
passed through filters into the filtrates. A total of 16
strains of AB and 49 strains of GIB were isolated from
seawater at each depth of St.1 and St.10 (Fig. 9). A high
frequency of PAB, 14 out of 16 strains (87.5%), showed
algicidal activity against C. antiqua (Fig. 9). Most of the AB
detected in surface waters from the both stations were
PAB isolates. In contrast, less than half of the PAB isolates
at both sites were confirmed to be GIB (St.1: 48%, St.10:
40%) at both sites. The majority of GIB was found to be
FLB at both stations and was found at all depths at St.1.