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Full-Text Articles in Social and Behavioral Sciences
Occurrence Of Trichodesmium Erythraeum (Cyanophyte) Bloom And Its Effects On The Fish Catch During April 2013, In The Andaman Sea, Arun Kumar, Gadi Padmavati, Hosahalli Pradeep
Occurrence Of Trichodesmium Erythraeum (Cyanophyte) Bloom And Its Effects On The Fish Catch During April 2013, In The Andaman Sea, Arun Kumar, Gadi Padmavati, Hosahalli Pradeep
Applied Environmental Research
A highly intense bloom of the nitrogen fixing Cyanobacteria Trichodesmium erythraeum(~7,000 filaments l-1) was observed during April 2013 (for a period of 5 days) in the Andaman Sea, at Lat.10°-13°N and Long. 93°-95°E.This is the first report of this bloom in the open waters of this region. Atmospheric temperature at the time ranged from 27 to 30.5 °C, sea surface temperature ranged from 29 to 34 °C, and salinity values ranged from 32.5 to 34 psu. However, there was no significant variation in pH (8.1-8.3), and DO concentrations ranged from 4.7 to 5.5 mg L-1during the studyperiod. Phosphate values ranged …
Dinoflagellate Bloom Produced By Protoperidinium Divergens Response To Ecological Parameters And Anthropogenic Influences In The Junglighat Bay Of South Andaman Islands, Karthik Raji, Gadi Padmavati
Dinoflagellate Bloom Produced By Protoperidinium Divergens Response To Ecological Parameters And Anthropogenic Influences In The Junglighat Bay Of South Andaman Islands, Karthik Raji, Gadi Padmavati
Applied Environmental Research
The bloom-forming dinoflagellate, Protoperidinium divergenshas been linked with coastaleutrophication in tropical and subtropical regions. Moderate to intense harmful algal bloom of dinoflagellates Protoperidinium divergens (33,500 cells. mL-1) was observed during June 2012in Junglighat Bay of Port Blair in South Andaman. Bloom of Protoperidinium divergenswas observed for four days and declined afterwards due to heavy rainfall with low seawater temperature of 24 to 26°C. A total of 63 species and 33 genera were identified. In the present investigation, the following species of phytoplankton and zooplankton were found to be common; phytoplanktonsuch as Amphorasp., Bacteriastrumsp., Chaetocerossp., Coscinodiscussp., Rhizosoleniasp., Gonyaulaxsp., Protoperidinium sp., Pyrophacussp.and …