BLOOM OF PHYTOPLANKTONS IN ANZALI LAGOON AND IDENTIFICATION OF POISONOUS ALGAE

During the period of 1979-1980 in Abkenar and Hendkhaleh in Anzali lagoon, 67 I genus of phytoplanktons belong to 5 phylum were identified. The results showed that there is two peaks of phytoplankton blooms during a year (summer and, autumn) in which Cyanobacteria (blue-green algae) were the most abundant groups. 5 species of them were identified in which one species was recognized toxic. This toxicity was confirmed through bioassay studies on mouse. Also, This toxin was hepatotoxin belongs to microcystins. Microcystins are cyclic peptides and contain seven aminoacids