scholarly journals Phytoplankton Tracking by Oceanic Model and Satellite Data in the Bay of Bengal and Andaman Sea

2012 ◽  
Vol 2 ◽  
pp. 183-189 ◽  
Author(s):  
Sakharin Suwannathatsa ◽  
Prungchan Wongwises ◽  
Suphat Vongvisessomjai ◽  
Worachat Wannawong ◽  
Donlaporn Saetae
Keyword(s):  
Satellite Data ◽  
Bay Of Bengal ◽  
Andaman Sea ◽  
Oceanic Model

Chlorophyll distribution by oceanic model and satellite data in the Bay of Bengal and Andaman Sea

2013 ◽  
Vol 42 (2) ◽  
Author(s):  
Sakharin Suwannathatsa ◽  
Prungchan Wongwises
Keyword(s):  
Satellite Data ◽  
Bay Of Bengal ◽  
Seasonal Distribution ◽  
Sea Surface ◽  
Andaman Sea ◽  
Wide Field ◽  
Sample Collection ◽  
Chl A ◽  
Phytoplankton Absorption ◽  
Oceanic Model

AbstractAn oceanic model and satellite data are used to evaluate the seasonal distribution of chlorophyll-a (Chl-a) in the Bay of Bengal (BoB) and Andaman Sea.Satellite data show high Chl-a concentrations because high Chl-a concentrations reduce CO2 and increase O2 at the sea surface, indicating fish abundance in the ocean. Sample collection alone cannot provide an accurate overview of Chl-a concentration over an entire region.The satellite data concerning Chl-a concentration, phytoplankton absorption coefficient, and Sea Surface Temperature (SST) are from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) project and from the Moderate Resolution Imaging Spectroradiometer (MODIS). The oceanic model is created to give the surface circulation as a result. The research finds that the simulation is in agreement with SST, Chl-a concentration, and phytoplankton absorption coefficients obtained from satellites. The conclusion is that the oceanic model can be used to implicitly explain the seasonal distribution of Chl-a in the Bay of Bengal and Andaman sea.

Energetics and spatio-temporal variability of semidiurnal internal tides in the Bay of Bengal and Andaman Sea

2020 ◽  
Vol 189 ◽  
pp. 102444
Author(s):  
A.K. Jithin ◽  
P.A. Francis ◽  
A.S. Unnikrishnan ◽  
S.S.V.S. Ramakrishna
Keyword(s):  
Bay Of Bengal ◽  
Temporal Variability ◽  
Internal Tides ◽  
Andaman Sea ◽  
Spatio Temporal

Description of Rhinobatos ranongensis sp. nov. (Rhinopristiformes: Rhinobatidae) from the Andaman Sea and Bay of Bengal with a review of its northern Indian Ocean congeners

Zootaxa ◽  
2019 ◽  
Vol 4576 (2) ◽  
pp. 257
Author(s):  
PETER R. LAST ◽  
BERNARD SÉRET ◽  
GAVIN J.P. NAYLOR
Keyword(s):  
Indian Ocean ◽  
Bay Of Bengal ◽  
Intraspecific Variability ◽  
Andaman Sea ◽  
Nominal Species ◽  
Northern Indian Ocean ◽  
Additional Material ◽  
Tissue Samples ◽  
New Material ◽  
Colour Morphs

A new species of guitarfish, Rhinobatos ranongensis sp. nov., is described from 5 preserved specimens, and images and tissue samples of additional material, collected from the Andaman Sea and Bay of Bengal. This species co-occurs in the eastern sector of the northern Indian Ocean with two poorly defined congeners, R. annandalei Norman and R. lionotus Norman, which have been misidentified and confused with Indo-Pacific congeners since they were first described in 1926. Norman’s species are rediagnosed based on limited new material and a re-examination of the types. In the western sector of the northern Indian Ocean, Rhinobatos annandalei has been confused in recent literature with the sympatric R. punctifer Compagno and Randall, which is represented by four primary colour morphs, including a white-spotted colour morph resembling R. annandalei. Rhinobatos punctifer also displays strong intraspecific variability and sexual dimorphism in some body dimensions. These four species of Rhinobatos have unique MtDna sequences and belong to a clade of Indo-West Pacific species that are morphologically similar. Despite the relatively small numbers of specimens available for investigation, these species exhibit some clear differences in body proportions, meristics and squamation. Rhinobatos ranongensis sp. nov. differs from its northern Indian Ocean congeners through a combination of a relatively narrow disc and mouth, high vertebral count, long snout, low dorsal fins, and being largely plain coloured. A new lectotype and a paralectotype are designated for the syntypes of R. annandalei, and the four primary colour forms of R. punctifer, the plain, white-spotted and ocellated morphs, are described and the three nominal species rediagnosed. A key is provided to the four known members of the genus in the northern Indian Ocean. 

scholarly journals ΔR Correction Values for the Northern Indian Ocean

Radiocarbon ◽  
2001 ◽  
Vol 43 (2A) ◽  
pp. 483-488 ◽  
Author(s):  
Koushik Dutta ◽  
Ravi Bhushan ◽  
B L K Somayajulu
Keyword(s):  
Indian Ocean ◽  
Bay Of Bengal ◽  
Arabian Sea ◽  
Andaman Sea ◽  
Northern Indian Ocean ◽  
Northern Arabian Sea ◽  
Ocean Region ◽  
Thermocline Ventilation ◽  
Ventilation Rates ◽  
Made In

Apparent marine radiocarbon ages are reported for the northern Indian Ocean region for the pre-nuclear period, based on measurements made in seven mollusk shells collected between 1930 and 1954. The conventional 14C ages of these shells range from 693 ± 44 to 434 ± 51 BP in the Arabian Sea and 511 ± 34 to 408 ± 51 BP in the Bay of Bengal. These ages correspond to mean ΔR correction values of 163 ± 30 yr for the northern Arabian Sea, 11 ± 35 yr for the eastern Bay of Bengal (Andaman Sea) and 32 ± 20 yr for the southern Bay of Bengal. Contrasting reservoir ages for these two basins are most likely due to differences in their thermocline ventilation rates.

Long-timescale variation in bulk and clay mineral composition of Indian continental margin sediments in the Bay of Bengal, Arabian Sea, and Andaman Sea

2014 ◽  
Vol 58 ◽  
pp. 117-138 ◽  
Author(s):  
Stephen C. Phillips ◽  
Joel E. Johnson ◽  
Michael B. Underwood ◽  
Junhua Guo ◽  
Liviu Giosan ◽  
...  
Keyword(s):  
Mineral Composition ◽  
Clay Mineral ◽  
Continental Margin ◽  
Bay Of Bengal ◽  
Arabian Sea ◽  
Andaman Sea ◽  
Clay Mineral Composition

A new deep-sea species of the snapping shrimp genus Alpheus Fabricius, 1798 (Decapoda: Caridea: Alpheidae) from Kagoshima Bay, Japan

Zootaxa ◽  
2018 ◽  
Vol 4434 (1) ◽  
pp. 99 ◽  
Author(s):  
TOMOYUKI KOMAI ◽  
JUN OHTOMI
Keyword(s):  
New Species ◽  
Bay Of Bengal ◽  
Deep Sea ◽  
Species Group ◽  
Andaman Sea ◽  
Snapping Shrimp ◽  
Kagoshima Bay ◽  
Major Cheliped ◽  
A New Species ◽  
Antennular Peduncle

A new species of the snapping shrimp genus Alpheus Fabricius, 1798, A. longipalma, is described and illustrated on the basis of material from Kagoshima Bay, Kyushu, Japan. It is referred to the A. brevirostris (Olivier, 1811) species group, and appears closest to A. macroskeles Alcock & Anderson, 1894, known with certainty from the Bay of Bengal and Andaman Sea, and A. talismani Coutière, 1898 from the eastern Atlantic. The greatly elongate minor cheliped in males, being subequal to or longer than the major cheliped with proportionally shorter dactylus distinguish the new species from A. macroskeles. The less elongate antennular peduncle and better-developed, rounded distal lamella of the antennal scaphocerite differentiate the new species from A. talismani. All specimens of the new species were trawled from depths greater than 200 m. 

scholarly journals Deoxygenation in Marginal Seas of the Indian Ocean

2021 ◽  
Vol 8 ◽  
Author(s):  
S. Wajih A. Naqvi
Keyword(s):  
Indian Ocean ◽  
Oxygen Content ◽  
Red Sea ◽  
Bay Of Bengal ◽  
Persian Gulf ◽  
Oxygen Demand ◽  
Andaman Sea ◽  
Marginal Seas ◽  
The Indian Ocean ◽  
Oxygen Minimum

This article describes oxygen distributions and recent deoxygenation trends in three marginal seas – Persian Gulf and Red Sea in the Northwestern Indian Ocean (NWIO) and Andaman Sea in the Northeastern Indian Ocean (NEIO). Vertically mixed water column in the shallow Persian Gulf is generally well-oxygenated, especially in winter. Biogeochemistry and ecosystems of Persian Gulf are being subjected to enormous anthropogenic stresses including large loading of nutrients and organic matter, enhancing oxygen demand and causing hypoxia (oxygen < 1.4 ml l–1) in central and southern Gulf in summer. The larger and deeper Red Sea is relatively less affected by human activities. Despite its deep water having remarkably uniform thermohaline characteristics, the central and southern Red Sea has a well-developed perennial oxygen minimum at mid-depths. The available data point to ongoing deoxygenation in the northern Red Sea. Model simulations show that an amplified warming in the marginal seas of the NWIO may cause an intensification of the Arabian Sea oxygen minimum zone (OMZ). Increases in particulate organic carbon and decreases in oxygen contents of the outflows may also have a similar effect. In the Andaman Sea, waters above the sill depth (∼1.4 km) have characteristics similar to those in the Bay of Bengal, including an intense OMZ. As in the case of the Bay of Bengal, oxygen concentrations within the Andaman Sea OMZ appear to have declined slightly but significantly between early 1960s and 1995. The exceedingly isothermal and isohaline water that fills the deep Andaman Basin is also remarkably homogenous in terms of its oxygen content. A very slight but statistically significant decrease in oxygen content of this water also seems to have occurred over three decades preceding 1995. New information is badly needed to assess the extent of further change that may have occurred over the past 25 years. There have been some reports of coastal “dead zones” having developed in the Indian Ocean marginal seas, but they are probably under-reported and the effects of hypoxia on the rich and diverse tropical ecosystems – coral reefs, seagrasses, and mangroves – in these seas remain to be investigated.

Review of the Indian Ocean spikefish genus Mephisto (Tetraodontiformes: Triacanthodidae)

Zootaxa ◽  
2020 ◽  
Vol 4802 (1) ◽  
pp. 82-98
Author(s):  
KATHERINE E. BEMIS ◽  
JAMES C. TYLER ◽  
PETER N. PSOMADAKIS ◽  
LAUREN NEWELL FERRIS ◽  
APPUKUTTANNAIR BIJU KUMAR
Keyword(s):  
Indian Ocean ◽  
Bay Of Bengal ◽  
East Coast ◽  
Andaman Sea ◽  
Micro Ct ◽  
Tooth Replacement ◽  
Color Photograph ◽  
Replacement Pattern ◽  
The Indian Ocean ◽  
Ct Data

We redescribe the triacanthodid spikefish Mephisto fraserbrunneri Tyler 1966 based upon eight specimens (five newly reported herein) and the first color photographs of freshly collected specimens; these data are compared with that of the single specimen of the recently described M. albomaculosus Matsuura, Psomadakis, and Mya Than Tun 2018. Both species are found in the Indian Ocean, with M. fraserbrunneri known from the Arabian Sea off the east coast of Africa to the eastern Bay of Bengal, and M. albomaculosus confirmed only from the type locality in the Andaman Sea (a color photograph of an individual M. cf. albomaculosus from the Bay of Bengal that was not retained is also presented). We describe and diagnose the genus Mephisto and provide a key to the two species based upon all available specimens. We also provide a distribution map for both species and summarize literature records. Using micro-CT data, we show that Mephisto fraserbrunneri replaces teeth intraosseously, which suggests this tooth replacement pattern is plesiomorphic for Tetraodontiformes. 

India Stimulating Growth in Bay of Bengal Region: Integrating Key Interests and Strengthening Innovation Capacity

2018 ◽  
Vol 25 (1-2) ◽  
pp. 102-128
Author(s):  
Vijay Kumar Kaul ◽  
Tuhina Roy Chowdhury
Keyword(s):  
Development Strategy ◽  
Economic Integration ◽  
Bay Of Bengal ◽  
Technological Development ◽  
Growth Strategy ◽  
Sustainable Growth ◽  
Andaman Sea ◽  
Recent Past ◽  
The World ◽  
Innovation Capacity

The Bay of Bengal and Andaman Sea (BoBAS) rim countries comprising of India, Indonesia, Bangladesh, Thailand, Myanmar, Sri Lanka, Malaysia and Singapore is a group that has the potential to emerge as one of the fastest growing regions in Asia and the world. These countries are tied together with a multitude of factors such as history, culture, demographics and technological development. This article seeks to evaluate if these countries can complement each other’s growth strategy and the role that India can play to stimulate growth in this region. The article can broadly be divided into two parts: the first part discusses the evolution of development strategy and regional economic integration while the second part analyses the role that India can play in guiding the growth across these countries and the various key initiatives taken up by India in recent past to foster high and sustainable growth.

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