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Title Study of ecological consequence of the bloom (noctiluca miliaris) in off-shore waters of the northern Arabian sea
 
Names Dwivedi, R.M.
Chaudary Rajeswari
Solanki, H.V.
Raman Mini
Matondkar, S.G.P.
Madhu, V.R.
Meenakumari, B.
Date Issued 2012 (iso8601)
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 observe
d during February-early March. During the cruise FORV
SS-212
Sagar Sampada
in February-March 2003, surface water samples measured 64–4128 cells.l
-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
-3
, which
reflect unusually high primary production in
the deep waters (>2000 m). A patter
n of zooplankton showed unusually high
growth in the bloom waters. Fish catch data (% hooking rates of
tuna) were obtained from Fisher
y 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 ca
tches 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.
Genre Article
Identifier Indian J. Geo Marine Sci. 41(4): 304-313