DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 6841-6860 of 9429
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Implications of post-disturbance studies on the grain size of the sediments from the Central Indian Basin
(Indian Academy of Sciences, 2001)Indian Deep-Sea Environment Experiment (INDEX) was conducted by simulating benthic disturbance and resuspension of the sediments in 3 km ´ 200 m narrow strip at 5300 m water depth in the Central Indian Basin (CIB). Using ... -
Heavy sediment influx during early Holocene: Inference from clay mineral studies in a core from the western Bay of Bengal
(Indian Academy of Sciences, 2001)Clay mineral studies were carried out in a 650 cm long sediment core collected at a depth of 2200 m from the north-western Bay of Bengal. Illite is the predominant mineral, followed by montmorillonite and chlorite. Illite ... -
High biological productivity in the central Arabian Sea during the summer monsoon driven by Ekman pumping and lateral advection
(Indian Academy of Sciences, 2001)Open oceans are generally oligotrophic and support less biological production. Results from the central Arabian Sea show that it may be an exception to this. We provide the observational evidence of fairly high biological ... -
18 Ka BP records of climatic changes, Bay of Bengal: Isotopic and sedimentological evidences
(Indian Academy of Sciences, 2001)Based upon the oxygen isotopic records of Globigerinoide sacculifer, the clay mineral assemblages and aridity indicator chlorite/illite (C/I) ratio, the palaeoclimatic changes during the past 18 Ka BP have been archived. ... -
Submerged beach ridge lineation and associated sedentary fauna in the innershelf of Gopalpur Coast, Orissa, Bay of Bengal
(Indian Academy of Sciences, 2001)Detailed echosounding and side-scan sonar surveys coupled with SCUBA-diving operations in the innershelf region of Gopalpur, Orissa coast revealed the existence of a submerged NE-SW trending ridge lineation between the ... -
Respiratory enzyme activities in the oxygen-deficient waters of the Arabian Sea
(Indian Academy of Sciences, 2001)Denitrification in the oxygen-poor waters at intermediate depths in the Arabian Sea is very intense. Depth profiles of nitrite and the activities of the electron transport system (ETS) and dissimilatory enzymes such as ... -
Arabian Sea oceanography and fisheries of the west coast of India
(Indian Academy of Sciences, 2001)The physical and chemical forcing, which drives the Arabian Sea production is now fairly understood. The main attributes which contribute to the productivity are (1) the boundary and open ocean processes, which manifest ... -
Littoral drift sources and sinks along the Indian coast
(Indian Academy of Sciences, 2001)Numerous theoretical and field studies have been carried out to quantify the volume and direction of littoral sediment transport along the Indian coast. Nevertheless, very little effort has been made to identify the sources ... -
New stable isotope records of sediment cores from the SE Arabian Sea - Inferences on the variations in monsoon regime during the late Quaternery
(Indian Academy of Sciences, 2001)We reconstruct here the changes in regional hydrography related to the fluctuations in Indian monsoons during the late Quaternary based on the stable isotope composition of the foraminifers and organic matter in three ... -
Reference problems
(Indian Academy of Sciences, 2001) -
An occurrence of approx. 74 ka Youngest Toba tephra from the western continental margin of India
(Indian Academy of Sciences, 2001)A dispersed volcanic ash layer was recovered at ~6 300 cm depth in a 5.52 m long sediment core collected at a latitude 9~'21'E from a water depth of 2300 m on the Western Continental Margin of India (WCMI). Glass shards ... -
A deep-sea bacterium with unique nitrifying property
(Indian Academy of Sciences, 2001)Sediment cores collected from the Central Indian Basin (10°1¢–10°2¢S, 75°59¢–76°2¢E) harboured a high population of nitrifying bacteria which ranged from 103 to 107 cfu per gram dry weight. This high density could contribute ... -
Sea truth validation of sea WiFS ocean colour sensor in the coastal waters of the eastern Arabian Sea
(Indian Academy of Sciences, 2001)In this paper we report bio-optical measurements made during an ocean colour validation cruise SK 149C in November 1999 of the research vessel Sagar Kanya in the coastal waters of the Eastern Arabian Sea. The chlorophyll ... -
Foraminifera from the Chilka Lake on the east coast of India
(Marine Biological Association of India, 2000)A total of sixtynine foraminiferal species belonging to 27 genera and 19 families have been identified from the sediment samples of the Chilka lake collected during three faunal surveys representing different seasons. ... -
Does temperature affect dimorphic reproduction in benthic foraminifera? A culture experiment on Rosalina leei
(Indian Academy of Sciences, 2000)The possible effects of environmental factors on the dimorphic mode of reproduction in benthic foraminifera have been reported in the literature. Published observations based on field samples have indicated an inverse ... -
Public access to Indian geographical data - Guest editorial
(Indian Academy of Sciences, 2000) -
Science popularization and the Indian constitution - Correspondence
(Indian Academy of Sciences, 2000)Article 51A (h) of the Indian Constitution reads as follows, (citizens have a duty) to develop the scientific temper, humanism and the spirit of inquiry and reform. This item under basic duties is of great importance to ... -
The Himalayas revisited
(Indian Academy of Sciences, 2000)The Himalayas are a complex, uplifted and deformed mountain range, brought about by tectonic activities, culminating in a series of plate collisions, most of which are still currently active. The Indo-Eurasian Plates’ ... -
Complete regeneration of ablated eyestalk in penaeid prawn, Penaeus monodon
(Indian Academy of Sciences, 2000)Ablation of one eyestalk is generally practised in all commercial prawn hatcheries to induce gonad maturation and spawning. An observation was made that the ablated eyestalk of spent females of the tiger prawn Penaeus ... -
Primary productivity of marine macrophytes in the coral reef lagoon of the Kadmat Island, Lakshadweep
(Indian Academy of Sciences, 2000)n situ primary productivity measurements were carried out with different macrophyte species (belonging to four groups) dominating the benthic communities in the coral reef lagoon of the Kadmat Island of the Lakshadweep ...