Mortality of farmed pearl oyster Pinctada fucata (Gould, 1850) due to the blooming of Noctiluca scintillans and Cochlodinium sp. at Kollam Bay, Kerala

Mohamed, K S and Kripa, V and Jugnu, R and Radhakrishnan, P and Alloycious, P S and Jenni, B and Joseph, Mathew and Velayudhan, T S (2007) Mortality of farmed pearl oyster Pinctada fucata (Gould, 1850) due to the blooming of Noctiluca scintillans and Cochlodinium sp. at Kollam Bay, Kerala. Journal of the Marine Biological Association of India, 49 (2). pp. 213-218.

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Abstract

Blooming of the dinoflagellates Noctiluca scintillans was observed at Kollam Bay, Kerala during September 2003 (bloom-1) and Cochlodinium sp. in September 2004 (bloom-2) with cell densities of 9.8 x 104 and 1.4 x 105 cells l-1 respectively. These caused 27% and 100% mortality of the farmed pearl oyster Pinctada fucata in the raft farms of Central Marine Fisheries Research Institute moored in the Bay. The mortality of the pearl oysters can be attributed to the high dissolved ammonia 14.9 μmol l-1 during bloom-1 and high dissolved ammonia (14.7 μmol l-1) and total suspended solids (154.8 mg l-1) during bloom-2. These instances of harmful algal blooms (HAB) indicate that precautionary management protocols should be developed to relocate the farm stock to overcome such natural causes to prevent economic loss to farmers.

Item Type:Article
Uncontrolled Keywords:Noctiluca scintillans; Cochlodinium sp.; harmful algal blooms (HAB); farmed pearl oysters
Subjects:Molluscan Fisheries > Pearl oyster
Divisions:CMFRI-Cochin > Marine Capture > Molluscan Fisheries
ID Code:2140
Deposited By:Dr. V Mohan
Deposited On:09 Aug 2010 16:39
Last Modified:26 May 2011 12:44

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