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A report on mesopelagic foraminiferal species of Hastigerinelladigitata from the neritic waters of Andaman Island

Research Paper | April 1, 2018

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M. Muruganantham, P.M. Mohan, C. Jeeva, Akshai Raj

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J. Bio. Env. Sci.12( 4), 1-7, April 2018


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The neritic water of Port Blair Island was sampled to delineate the Planktonic foraminiferal distribution. Zooplankton samples collected each month and observed under the microscope. While a mesopelagic foraminiferal species Hastigerinelladigitata was encountered during the south west monsoon. The identified species is deep dweller and generally abundant in cooler water. So the deeper water species dwelling in surface waters of neritic environment, it may be the regional hydrographical conditions i.e. the heavy wind towards the leeward and the current system might have brought to the near shore surface water from the shallow depth around 100 m. As well as it is a significant report to trace the changes of hydrographical activities and eco provenance of planktonic foraminifera on the neritic waters of this Island. The continuous monitoring of the species occurrences and the observation of oceanographic parameters and analysis of water mass tracers may give better idea of the eco provenance of planktonic foraminifera, which are highly useful to demarcate the water masses and its sources. In addition this species also identified as first time for the Andaman and Nicobar Islands.


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A report on mesopelagic foraminiferal species of Hastigerinelladigitata from the neritic waters of Andaman Island

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