Refine your search
Collections
Co-Authors
Journals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Jayaraju, N.
- Living Benthic Foraminiferal Assemblages of Pulicat Lake, East Coast of India
Abstract Views :188 |
PDF Views:3
Authors
Affiliations
1 Department of Geology, S. V. University, Tirupati - 517502, IN
2 Coastal Survey and Consultancy Services, 208 KB, Lal Industrial Estate, Santa Cruz (W), Mumbai - 400 054, IN
1 Department of Geology, S. V. University, Tirupati - 517502, IN
2 Coastal Survey and Consultancy Services, 208 KB, Lal Industrial Estate, Santa Cruz (W), Mumbai - 400 054, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 56, No 3 (2000), Pagination: 331-339Abstract
This paper attempts to document the dominant living foraminiferal assemblages in 30 sampling stations in Pulicat lake during the four seasons of a year. Nearly 35 living species have been identified and their relative abundance was analyzed using Q-mode factor analysis programme. In each season, six faunal assemblages at an average of 64.5% of the observed variance emerged from the analysis. Statistical studies have revealed that the most significant assemblage is characterized by Florilus labrodoricum and F. grateloupi (av. 25.1%). Foraminiferal variation throws light on water mass characters such as salinity, water depth and the bottom sediments.Keywords
Living Foraminifera, Seasonal Variation, Pulicat Lake, Bay of Bengal, Tamil Nadu.- Recent Benthic Foraminiferal Genera from Pulicat Lake, East Coast of India: An Apprisal Using Factor Analysis
Abstract Views :173 |
PDF Views:2
Authors
Affiliations
1 Department of Geology, Sri Venkateswara University, Tirupati-517 502 A.P., IN
2 Department of Geology, Sri Venkateswara University, Tirupati- 517 502 A.P., IN
3 Geonics (India) Pvt. Ltd., 501, Devavrata, Sector-17, Vashi, New Bombay-400 705, IN
1 Department of Geology, Sri Venkateswara University, Tirupati-517 502 A.P., IN
2 Department of Geology, Sri Venkateswara University, Tirupati- 517 502 A.P., IN
3 Geonics (India) Pvt. Ltd., 501, Devavrata, Sector-17, Vashi, New Bombay-400 705, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 51, No 1 (1998), Pagination: 69-74Abstract
A total variance explaining 86% of the matrix is consituted by six factors where Florilus-Asterorotalia assemblage (46%) emerged significant. Asterorotalia-Florilus assemblage is more abundant (37%) in monsoon. These faunal assemblages were related to environmental ingredients Viz., texture of sediment substrate, the amount of locked-up organic matter content and bottom water salinity. The cross plot of first two factors for both seasons revealed the common genera found to occur in descending order i.e., Asterorotalia, Florilus, Elphidium and Ammobaculites which are confined especially in normal marine action of sea oscillations are noticed.Keywords
Palaeontology, Foraminifera, Factor Analysis, East Coast.- A Note on the Occurrence of Elphidium norvangi from Southeast Coast of India
Abstract Views :176 |
PDF Views:115
Authors
Affiliations
1 Department of Geology, S. V University, Tirupati, IN
2 Oil & Natural Gas Commission, Madras, IN
1 Department of Geology, S. V University, Tirupati, IN
2 Oil & Natural Gas Commission, Madras, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 44, No 1 (1994), Pagination: 95-96Abstract
No Abstract.- Factor Analysis of Benthic Foraminifera from Coastal and Estuarine Sediments of Kovalam-Tuticorin, South India
Abstract Views :170 |
PDF Views:1
Authors
Affiliations
1 Department of Geology, Sri Venkateswara University, Tirupati - 517 502, IN
1 Department of Geology, Sri Venkateswara University, Tirupati - 517 502, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 48, No 3 (1996), Pagination: 309-318Abstract
This study investigates the present faunal geographical boundaries and environmental limits of foraminifera in the southeast coast of India. Ninety samples were examined. The raw data of foraminiferal population was analysed with the R-mode factor analysis program. Twelve factor assemblages, explaining 74% of the observed variance emerged from this test. The statistically most important assemblage is Ammonia beccarii, Asterorotalia dentata. The last assemblage is represented by Rectobolivina raphana. These assemblages reflect the hyposaline to hypersaline conditions and sandy to muddy sand substrate environment. The cross plot of the first two factors shows the separation of two groups as lower, which is dominated by Miliolids and seconded by Rotaliids and upper group is predominately represented by Rotaliids. Physico-chemical parameters could be the reason for the separate grouping of the species.Keywords
Palaeontology, Factor Analysis, Benthic foraminifera, South India.- Effect of River Discharge on the Test Morphology of Benthic Foraminifera, Southeast Coast of India
Abstract Views :170 |
PDF Views:2
Authors
N. Jayaraju
1,
K. R. Reddi
1
Affiliations
1 Department of Geology, Sri Venkateswara University, Tirupati - 517 502, IN
1 Department of Geology, Sri Venkateswara University, Tirupati - 517 502, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 50, No 4 (1997), Pagination: 435-439Abstract
Foraminifera, being extremely sensitive to ever changing marine microhabitat and ecosystem, can respond to and amplify even slight monsoonal rainfall fluctuations, particularly, near river mouth. The effect of river discharge on the test morphology of foraminifera has revealed high inertness of rounded symmetrical morpho-group to furious turbulences coupled with enormous fresh water influx. whereas negative trend is noticed with regard to angular-asymmetrical morpho-group. The results could be highly promising in reconstruction of paleomonsoonal history through morpho-group studies in the coastal fringe.Keywords
Palaeontology, Foraminifera, East Coast, India.- Foraminiferal Species Densities and Environmental Variables of Pulicat Lake, Southeast Coast of India
Abstract Views :168 |
PDF Views:2
Authors
Affiliations
1 Department of Geology, Sri Venkateswara University, Tirupati - 517 502, IN
1 Department of Geology, Sri Venkateswara University, Tirupati - 517 502, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 70, No 5 (2007), Pagination: 829-836Abstract
Total (Dead + live) forarminiferal species have been studied for four seasons viz, pre monsoon (July-Sept), monsoon (Oct-Dec), post monsoon (Jan-Mar) and summer (April-June) in relation to ecological variables of Pulicat-Lake. Total population ranges from 298 to 1480/100 gms of sediment with an average of 615 per sample. Living crop ranges from 20 to 240/100 gms with an average of 86 per sample for the whole lake. The lowest L/D ratio (43%) was noticed at station 19 in monsoon and the highest (54 7%) was recorded at station 29 in pre monsoon. There IS no much significant difference in variability for all the four seasons with Co-Efficient of variation (CV) ranging from 41 to 46% Out of 50 species recorded, only 35 had living representatives, while the rest occurred as dead. The prominent stained (live) species in the decreasing importance are Ammonia beccan, A tepida, Elphidiurn hispidulum, Quinqueloculina agglutinans, Elphidium excavatum, Quinqueloculina hadav, Q oblonga and Elphidium milletti.The coefficient correlation values for dissolved oxygen versus living fauna in monsoon (g = 0 33) and in summer (g=-0 26) are slightly below the significance level (g=O 36) at 95% confidence level. A high positive correlation and a high inverse relationship have been demonstrated between salinity and microbiota in monsoon and summer respectively. With the increase in organic matter fauna decreased in diversity and abundance in both the seasons. It may be concluded that in the Pulicat Lake as a whole, the environmental conditions are moderately favorable for the growth and survival of benthic foraminifera.
Keywords
Recent Forarminifera, Lake Environment, Ecology, Diversity And Density, Pulicat Lake.- Anthelmintic Activities of Glycosmis pentaphylla and Spondias pinnata
Abstract Views :219 |
PDF Views:155
Authors
Source
Asian Journal of Pharmaceutical Research and Health Care, Vol 1, No 1 (2009), Pagination: 91-96Abstract
Extracts from Glycosmis pentaphylla ischolar_mains, and stem heart wood and bark of Spondias pinnata when tested in vitro , showed potent Anthelmintic activity on th e earthworm, Pheretima posthuma . Methanolic extract of G. pentaphylla was more active than its chloroform extract (p <0.001), while stem heart wood Methanolic extract of S. pinnata was als o more potent than the bark extract.Keywords
Glycosmis pentaphylla, Spondias pinnata, Anthelmintic Activity.- Coastal Morphodynamics of Tupilipalem Coast, Andhra Pradesh, Southeast Coast of India
Abstract Views :197 |
PDF Views:79
Authors
G. Sreenivasulu
1,
N. Jayaraju
1,
B. C. Sundara Raja Reddy
2,
T. Lakshmi Prasad
3,
B. Lakshmanna
1,
K. Nagalakshmi
3
Affiliations
1 Department of Geology, Yogi Vemana University, Kadapa 516 003, IN
2 Department of Geology, Sri Venkateswara University, Tirupati 517 502, IN
3 Department of Earth Sciences, Yogi Vemana University, Kadapa 516 003, IN
1 Department of Geology, Yogi Vemana University, Kadapa 516 003, IN
2 Department of Geology, Sri Venkateswara University, Tirupati 517 502, IN
3 Department of Earth Sciences, Yogi Vemana University, Kadapa 516 003, IN