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Please use this identifier to cite or link to this item: http://drs.nio.org/drs/handle/2264/4180

Title: Study of ecological consequence of the bloom (Noctiluca miliaris) in off shore waters of the Northern Arabian Sea
Authors: Dwivedi, R.M.
Chauhan, R.
Solanki, H.U.
Raman, M.
Matondkar, S.G.P.
Madhu, V.R.
Meenakumari, B.
Citation: Indian Journal of Geo-Marine Sciences, vol.41(4); 2012; 304-313
Issue Date: 2012
Publisher: CSIR-NISCAIR
Abstract: Ship based observations during early March 2007 in oceanic waters of the Northeastern Arabian Sea followed by phytoplankton analysis indicated that the bloom Noctiluca miliaris, species of dinoflagellate, dominated oceanic waters of the basin during winter. Dark green discoloration was observed during February - early March. During the cruise FORV Sagar Sampada (SS-212) in February-March 2003, surface water samples measured 64–4128 cells.1sup(-1) and deeper layers (10-15 m) supported 1080-2542 cells.l-1 of Noctiluca. Chlorophyll concentrations were in a range 0.4-2.0 mg.m sup(-3), which reflect unusually high primary production in the deep waters (greater than 2000 m). A pattern of zooplankton showed unusually high growth in the bloom waters. Fish catch data (percent hooking rates of tuna) were obtained from Fishery Survey of India and were used to study response of fish to prevailing high productivity in the bloom waters. Fishing in oceanic waters within Indian EEZ indicated no adverse effect of bloom; rather remarkably higher catches resulted from long line operations in the bloom waters. Space-time variability in dissolved oxygen was studied to explain the observed preference of fish in the bloom waters.
Document type: Journal Article
Copyright: © IJMS/NISCAIR 2010. CC Attribution 3.0 License
URI: http://drs.nio.org/drs/handle/2264/4180
Appears in Collections:Biological Sciences

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