Investigation on Harmful Algal bloom (Red tide) of Cochlodinium polykrikoides in the Persian Gulf of Iran

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Abstract

The monitoring of the harmful bloom of Cochlodinium polykrikoides in the northern Persian Gulf was
studied during 2010 to 2011. The results revealed that in the waters of Hormozgan Province, the Diatoms
and Dinoflgellates had the highest frequency. No significant difference was found for amount of nutrients
in three sub- regions. The bloom of C. polykrikoides was higher in central sub-region in spring and was
occurred in the eastern sub-region in summer, but no mortality of fishes was recorded. In Bushehr
Province, four classes of Bacillaryophyceae, Cyanophyceae, Dynophyceae and Prymnesiophyceae were
determined. Furthermore significant different values of nutrients were recorded. In waters of Khuzestan
Province, different values of NH4 were measured for different months. In total, the measured ratio of N: P
in all months were lower than Redfield Ratio (16:1) in which subsequently the environmental condition
was not suitable for bloom of C. polykrikoides.

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Iranian Scientific Fisheries Journal
Volume 23, Issue 4 - Serial Number 4
March and April 2015
Pages 49-60

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