Aug M F-12 1, 2 & 3 Jun Aug O-13 Cyanophyceae Trichodesmium erythraeum Aug O M-12 1, 2 & 3 Jun Aug O D Apr-13 Haptophyceae
Phaeocystis globosa Aug O M D Jan-12 1, 2 & 3 Aug O D-13 Genus/Species Impact Dinophyceae Alexandrium tamiyavanichii PSP (GEOHAB, 2010) Cochlodinium polykrikoides Fish mortality (Garate-Lizarraga, Lopez-Cortes, Bustillos-Guzman & Hernandez-Sandoval, 2004) Dinophysis spp.
A one-way analysis of variance (ANOVA, [alpha] = 0.05) was used to identify significant differences between treatments in water quality variables (temperature, DO, pH, salinity, TAN, nitrite-nitrogen, nitrate-nitrogen, silicate, orthophosphate, alkalinity, and settleable solids), bacterial densities (Vibrio, THB, and TAB), production variables (final weight, SGR, survival, yield, and FCR) and phytoplankton densities (Bacillariophyceae, Cyanophyceae, Chlorophyceae, Haptophyceae, Dinophyceae, and Euglenophyceae).
Phytoplankton were represented by the classes Cyanophyceae (49.1%), Chlorophyceae (38.0%), Haptophyceae (6.3%), Bacillariophyceae (3.2%), Dinophyceae (2.3%), and Euglenophyceae (1.1%), and no significant difference was observed among treatments (P > 0.05).
Many taxa from the Haptophyceae and Dinophyceae, two dominant bloom-forming groups, not only produce concentrated DMSP but seem to have high DL activity (Table 4), several appear to operate as activated systems.
Significance of tintinnid grazing during blooms of Phaeocystis pouchetii (Haptophyceae) in Dutch coastal waters.