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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
Srivastava, S. S.
- Future Trend of Tiger Population in Similipal Tiger Reserve
Abstract Views :253 |
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Source
Indian Forester, Vol 123, No 10 (1997), Pagination: 902-909Abstract
Data on Tiger popUlation estimates from 1972 to 1997 have been analysed along with human population from 1971 to 1991 to regress the status of Tiger population in Similipal Tiger Reserve by the year 2061. Assumption has been made that the rate of growth of human population continuesilt the rate seen upto 1991. During observation years 1974-1997, the per cent rate of growth of Tiger population followed a declining trend which becomes negative after the year 2008, in spite or continuance of managerial inputs at the present level. For calculation of 'Multiple Regression' the independent variables were considered to be the management years and human population, ami the dependent variable was the per cent growth rate for number of Tigers in the Reserve. The work substantiates earlier findings that the Tiger population in Similipai Tiger Reserve is a population threatened by growth of human population. Restriction of use-area by inhabiting human population and enhancing measures for habitat improvement are suggested to possibly delay the anticipated negative trend of growth of Tiger population.
- Fire Protection Plan in East Melghat Forest Division, Amravati, Maharashtra - a Case Study
Abstract Views :266 |
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Source
Indian Forester, Vol 121, No 7 (1995), Pagination: 591-599Abstract
Fire Protection Plan for the East Melghat Forest Division, Amravati was taken up, keeping in view the extent of damage done to the forests in previous years. The plan mainly focuses on early detection, suppression and organisation of Field Staff and available resources to control the fire which has effectively reduced the area burnt and has helped to conserve the ecology and biodiversity of the region.- Effect of Cypermethrin on Conjugation of Sex Steroid Hormones during Two Different Reproductive Phases (Reproductively Active Prespawning and Reproductively Inactive Post-Spawning) of the Annual Reproductive Cycle in Heteropneustes fossilis (BLOCH)
Abstract Views :343 |
PDF Views:79
Authors
Affiliations
1 Department of Zoology, Tilak Dhari Postgraduate College, Jaunpur-222 002 UP, IN
2 Ganpat Sahai Postgraduate College, Sultanpur-228 001 UP, IN
1 Department of Zoology, Tilak Dhari Postgraduate College, Jaunpur-222 002 UP, IN
2 Ganpat Sahai Postgraduate College, Sultanpur-228 001 UP, IN
Source
Indian Journal of Science and Technology, Vol 4, No S8 (2011), Pagination: 264-265Abstract
No AbstractFull Text
References
- MOORE, A. AND WARING, C.P. 2001. The effects of a synthetic pyrethroid pesticide on some aspects of reproduction in Atlantic salmon (Salmo salar L.). Aquat. Toxicol., 52: 1-12.
- SINGH, P. B. AND KIME, D.E. 1995. Impact of γ- hexachlorocyclohexane on the in vitro production of steroids from the endogenous and exogenous precursors in the spermiating roach, Rutilus rutilus. Aquat. Toxicol,. 31: 231-240.
- Palaeoenvironmental Deductions of Microfossil Flora and Fauna of the Shiala and Yong formations, Tethyan Garhwal Himalaya
Abstract Views :172 |
PDF Views:2
Authors
Affiliations
1 Department of Geology, Vinoba Bhave University, Hazaribagh - 825 301, IN
2 Department of Earth Sciences, Indian Institute of Technology, Roorkee - 247 667, IN
3 KDMIPE, Geology Division, ONGC, Dehra Dun-248 195, IN
1 Department of Geology, Vinoba Bhave University, Hazaribagh - 825 301, IN
2 Department of Earth Sciences, Indian Institute of Technology, Roorkee - 247 667, IN
3 KDMIPE, Geology Division, ONGC, Dehra Dun-248 195, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 65, No 1 (2005), Pagination: 26-42Abstract
The present study is an interdisciplinary approach to put forward a precise picture of Ordovician-Silurian acritarcha and other associated microfossil distribution in the Lower Palaeozoic Tethyan sequence of the Garhwal Himalaya, lndia For the purpose, sedimentological data, macrofauna and microflora from the Shiala and Yong Formations have been considered to constrain the environmental distribution of the microfossils It has been found that chitinozo and melanosclerites as well as acritarcha of Garhwal Tethys Himalaya have a wide range of adaptation The acritarcha bloomed during cool marine condition whereas chitinozoa and melanosclerites preferred mainly In warm-water condition of blooming The Shlala Formation was deposited under cool-water conditions In a shallow pulsating basin with a rapid variations In the depositonal environment and frequent sea-level changes This formation has been affected by the fluvial influx intermittently and possibly there was a sea-level drawdown at Ordovician-Silurian boundary An attempt has been made to correlate this phenomenon with a possible Late Ordovician glacioeustatic event and it is found that the Hirnantian glaciation was probably not situated in the Himalayan region The Yong Formation was deposited mainly in a shallow subtidal setting in a tranquil and low energy ancient warm-water mass.Keywords
Microfossil flora and fauna, Acntarcha, Palaeoenvironment, Ordovician-Silurian, tethys Hlmalaya, Garhwal, Uttaranchal.- Effect of Cypermethrin on Conjugation of Sex Steroid Hormones during Reproductively Active and Reproductively Inactive Phases of the Annual Reproductive Cycle in Heteropneustes fossilis (Bloch)
Abstract Views :249 |
PDF Views:139
Authors
Affiliations
1 Department of Zoology, T. D. College Jaunpur (UP), IN
2 Ganpat Sahai PG College, Sultanpur-228001, IN
1 Department of Zoology, T. D. College Jaunpur (UP), IN
2 Ganpat Sahai PG College, Sultanpur-228001, IN
Source
Journal of Ecophysiology and Occupational Health, Vol 11, No 1-2 (2011), Pagination: 91-99Abstract
The aim of the present investigation was to assess the impact of cypermethrin exposure for 40 days at sublethal concentration (0.02 ppm) on gonado-somatic index (GSI) and the conjugation of plasma levels of free and conjugate reproductive sex steroids-testosterone (T), 11-ketotestosterone (11-KT), 17- hydroxyprogesterone (17-P) and 11-deoxycortisol (S) during prespawning and post-spawning phases of the annual reproductive cycle in freshwater male catfish, Heteronpneustes fossilis. Results indicate that there is decrease in conjugation (glucuronide and sulfate) after exposure. Histology of testes indicates gross condensation of spermatogenic cells, cytotoxic damage and vacuolization in the tubular epithelium in the testes after exposure. Cypermethrin causes inhibition of free to conjugate form of sex steroids. Obviously such changes and inhibition of free to its glucuronide and sulfate sex steroids causes the disturbances in the equilibrium of sex hormones and affects the pheromonal behavior and reproduction by these conjugates of this species.Keywords
Cypermethrin, Histology, Sex Steroids, Conjugation, Catfish, Reproduction.Full Text
- Distribution of Nematophagous Fungi in Pusa Farm Samastipur, India
Abstract Views :217 |
PDF Views:102
Authors
Affiliations
1 Department of Nematology Rajendra Agricultural University Pusa, Samastipur 848 125, IN
1 Department of Nematology Rajendra Agricultural University Pusa, Samastipur 848 125, IN
Source
Journal of Biological Control, Vol 14, No 2 (2000), Pagination: 76-78Abstract
Three types of soils sampled, from 80 sites of Pusa farm have shown tbat nematode destroying fungi exist in all soil habitats. Sixty-one isolates were made consisting of 41 endoparasites and 20 predatory species. A total of nine nematophagous species represented by 7 genera were identified. Most common endoparasites were Catenaria vermicala Brichfield (13.75%) followed by C. anguillulae Sorokin (8.75%). Amongst the predators, the commonest being Monacrosporium megalosporum Drechsler (12.5%) followed by Stylopage leiohypha Drechsler (8.75%) and Cystopage cladospora Drechsler (2.5%). Rich in organic matter and humus soils were most fruitful source for Cystopage cladospora Drechsler and Harposporium arcuatum Barron respectively.Keywords
Distribution, Nematophagous Fungi, Nematode Destroying Fungi.Full Text
- Forestry Economics in India - Some Areas for Research
Abstract Views :378 |
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Authors
Source
Artha Vijnana: Journal of The Gokhale Institute of Politics and Economics, Vol 10, No 2 (1968), Pagination: 199-212Abstract
The important role that forests play in a nation's economy cannot be over-emphasized. Forests perform both protective and productive functions. In their protective role, they prevent the deterioration and wasting-away of the soils, temper the climate, and regulate streamflow, without which it would be impossible to organize agriculture efficiently.- Retrieval of Atmospheric Parameters and Data-Processing Algorithms forAVIRIS-NG Indian Campaign Data
Abstract Views :224 |
PDF Views:89
Authors
Manoj K. Mishra
1,
Anurag Gupta
1,
Jinya John
1,
Bipasha P. Shukla
1,
Philip Dennison
2,
S. S. Srivastava
1,
Nitesh K. Kaushik
1,
Arundhati Misra
1,
D. Dhar
1
Affiliations
1 Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380 015, IN
2 Department of Geography, University of Utah, Salt Lake City, UT, US
1 Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380 015, IN
2 Department of Geography, University of Utah, Salt Lake City, UT, US
Source
Current Science, Vol 116, No 7 (2019), Pagination: 1089-1100Abstract
Applications of high-spatial resolution imaging spectrometer data acquired from the Airborne Visible/ Infrared Imaging Spectrometer-Next Generation (AVIRIS-NG) under India campaign 2015–16, require a thorough compensation for atmospheric absorption and scattering. The data-processing algorithms used for retrieving critically important atmospheric parameters, namely ‘water vapour and aerosol optical depth (AOD)’ over land and water surfaces are presented. Over land surfaces, the dark dense vegetation method and radiative transfer modelling are used for deriving spectral AOD for boxes of 20 × 20 pixels. For AOD retrieval over water surfaces, dark-target approximation is used with near-infrared and shortwave infrared measurements. Estimation of precipitable water vapour is carried out using short-wave hyperspectral measurements for each pixel. A differential absorption technique (continuum interpolated band ratio) has been used for this purpose. The retrieved AOD and water vapour values were compared with in situ sun-photometer and radiosonde data respectively, indicating good matches. Further, these parameters were used to derive ‘atmospherically corrected surface reflectance and remote sensing reflectance’, for land and water surface respectively, assuming horizontal surfaces having Lambertian reflectance.Keywords
Aerosol, Atmospheric Correction, Hyperspectral Imaging, Surface Reflectance, Water Vapour.Full Text
References
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