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1

Estimating crop water requirements and assessing irrigation water distribution cost for rice production using a pipe network

100%
Gautam N. K., Sarkar S.
Polish Journal of Environmental Studies
|
2018
|
tom 27
|
nr 3
In this paper we attempted to estimate crop water requirement for rice production in an Indian state. We also assessed the cost of irrigation water distribution. The study area (phases I and II) belongs to a humid subtropical region with sandy clay loam soil. Here, farmers are presently using a partial border strip irrigation technique with supply pipe and riser. First, the Man Kendall test is performed on six years monthly rainfall data to check for the presence of a trend. We found that the data is random at a 5% significant level. Thereafter, the crop water requirement for rice production is calculated based on FAO guidelines and average monthly rainfall. The crop water requirement in the study area amounted to 7.22 lakh m³, of which Phase I is 6.12 lakh m³ and Phase II is 1.2 lakh m³. In order to fulfil this requirement, irrigation was conducted through a pipe network. Actual irrigation value is calculated based on four years of irrigation water distribution data. Finally, the average depth of water logging, time of pumping, and cost for surplus irrigated water are calculated. We found that at a rate of INR 5 per unit kWh, the cost of annual surplus irrigated water for rice is 4.32 lakhs for an irrigation area of 1.284 km² (phase I), and the same is INR 0.84 lakh for 0.252 km² (phase II). This loss can be minimized using proper scheduled regulation of irrigated water using the pipe distribution network.
2

Natural and human impact on land use change of the Sikkimese-Bhutanese Himalayan piedmont, India

100%
Prokop P., Sarkar S.
Quaestiones Geographicae
|
2012
|
tom 31
|
nr 3
3

Click beetle diversity of Buxa Tiger Reserve, West Bengal, India

81%
Sarkar S., Saha S., Raychaudhuri D.
World Scientific News
|
2015
|
tom 19
4

Comparison of body composition, physical fitness parameters and skeletal muscle damage indices among young Indian male soccer and hockey players

81%
Sarkar S., Chatterjee S., Dey S. K.
Baltic Journal of Health and Physical Activity. The Journal of Gdansk University of Physical Education and Sport
|
2019
|
tom 11
|
nr 2
5

Five new click beetles of Melanoxanthus Eschscholtz (Elateridae: Elaterinae) from Buxa Tiger Reserve, West Bengal, India

81%
Sarkar S., Saha S., Raychaudhuri D.
World Scientific News
|
2016
|
tom 50
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Assessment of flower visiting insects diversity as pollinators in two parks, Kolkata, India

81%
Chowdhury S., Sarkar S., Nandy A., Talapatra S. N.
International Letters of Natural Sciences
|
2014
|
tom 10
Insects are depends upon autotrophs and they attract by the flowers colour and shape as pollinator. This is a mutual relationship between flowers and insects. The present study aims to determine flower visiting insect diversity as pollinators in two parks as biomonitoring of automobile air pollution exposure, landscape changes and/or human interactions. The study areas were selected as per heavily-populated neighborhoods, nearby office buildings, nearby roads and continuous vehicular movements, human interactions as visitors, where fences and high levels of human disturbance are common. The study was carried out at 2 sampling stations viz (i) Elliot park and (ii) Agri-Horticulture Society. The flower species were selected viz. Helianthus annuus, Petunia sp. and Buganvilia spectabilis planting above mentioned areas because these species are more common among other species. In each flower, diversity of visiting insects were studied by qualitative and quantitative assessment. Indices were Species richness, Index of Dominance, Relative abundance, Shannon-Wiener Diversity Index and Evenness Index for insects for all selected sites were calculated using the statistical formulae. The present results clearly indicate that the flower visiting insects are very less in numbers on three flowering species and index values were decreased. This study is a preliminary assessment of flower visiting insects diversity but further researches are needed in relation to pollination efficiencies of flower visiting insects and biochemical and genetic damage study of flowers as well as air pollution load by using instruments. It was concluded that three flowering species viz. sunflower, petunia and bougainvillea are very common both the parks but insect visitors are common but present less in number, which may be due to the vehicular pollution and/or human interference and/or landscape changes due to nearby neighborhood blocks, office and residential buildings etc.
7

Wpływ zbiornika retencyjnego na fizykochemiczne właściwości rzeki himalajskiej (Tista, Indie)

81%
Wiejaczka L., Prokop P., Kozlowski R., Sarkar S.
Przegląd Geograficzny. Polska Akademia Nauk
|
2017
|
tom 89
|
nr 1
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Ethological study of flower visiting insects in two parks, Kolkata, India

81%
Sarkar S., Nandy A., Talapatra S. N.
International Letters of Natural Sciences
|
2014
|
tom 12
|
nr 1
Flower visiting insects attract by the flowers colour, shape, size and fragrance as pollinator. This is a mutual relationship between flowers and insects. The present study aims to know behavioural response or ethology of flower visiting insect in relation to particular flower and/or probable atmospheric changes in two managed parks, Kolkata, India. The study areas were selected as per heavily-populated neighborhoods, nearby office buildings, nearby roads and continuous vehicular movements, human interactions as visitors. The study was carried out at 2 sampling stations viz (i) Elliot park and (ii) Agri-Horticulture Society. The flower species were selected viz. Helianthus annuus (sunflower), Petunia sp. (petunia) and Buganvilia spectabilis (Buganvilia) planting above mentioned areas because these species are more common among other species. In each flower, behavioural response or ethology of visiting insects were studied by visual observation and total 10 flowers of each species were observed randomly. The present results clearly indicate that various insects were majorly showed foraging and feeding behaviour and only mating behaviour was found in two species. This study is a preliminary assessment of flower visiting insects’ ethology but further researches are needed in relation to pollination efficiencies of flower visiting insects in the particular flower and air pollution load nearby area by using instruments. It was concluded that insect visitors are showing foraging and feeding behavior but only two species were showed mating behaviour, which may be due to the vehicular air pollution because two parks are located nearby roads and continuous vehicular movements were observed.
9
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Assessment of bird diversity as bioindicators in two parks, Kolkata, India

81%
Chowdhury R., Sarkar S., Nandy A., Talapatra S. N.
International Letters of Natural Sciences
|
2014
|
tom 11
|
nr 2
The trees of parks and gardens support many species, the survival of urban-dwelling species mainly bird species. Birds amongst other species provide a wide range of environmental and social functions to cities and urban dwellers. The present study aims to know bird diversity in two parks as bioindicator of automobile air pollution exposure, landscape changes and/or human interactions. The study areas were selected as per heavily-populated neighborhoods, nearby office buildings, nearby roads and continuous vehicular movements, human interactions as visitors, where high levels of human disturbance are common. The study was carried out at 2 sampling stations viz (i) Elliot park and (ii) Agri-horticulture Society. The bird species diversity was studied by qualitative and quantitative assessment. Indices were Species richness, Index of Dominance, Relative abundance, Shannon-Wiener Diversity Index and Evenness Index for birds for all selected sites were calculated using the statistical formulae. The present results as bioindicators bird species clearly indicate that the bird species are very few in numbers in both the parks. When comparison made between both the parks, it was observed less number of bird varieties (16 types) in Elliot park than varieties (9 types) more less in number in Agri-horticulture society. This study is a preliminary assessment of bird diversity but further researches are needed in relation to biochemical and genetic damage study as well as air pollution load by using instruments. In the present study it was concluded that the less numbers of birds and their different diversity indices were found a decreasing trends, though there no attempt has been made on physico-chemical properties of present air pollutants. The less number of varieties of bird species are as tolerant bioindicators, which may be due to the vehicular pollution and/or human interference and/or landscape changes due to nearby neighborhood blocks, office and residential buildings, continuous movement of vehicles etc.
10

Melatonin action on thyroid activity in the soft-shelled turtle, Lissemys punctata punctata

80%
Sarkar S., Sarkar N. K., Bhattacharyya S., Das P.
Folia Biologica
|
1997
|
tom 45
|
nr 3-4
11
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Behavioural toxicology of midge larvae Chironomous sp. after acute in situ exposure of different industrial effluents and drinking water

71%
Bhunia D., Sarkar S., Banerjee K., Nandy A., Talapatra S. N.
International Letters of Natural Sciences
|
2014
|
tom 14
Behavioural activities in relation to toxicological aspects involve behavioural changes of aquatic organisms under the exposure of a contaminant. The present study aims to know behavioural activities of midge larvae Chironomus sp. at the in-situ acute exposure of different chemicals containing wastewater viz. lead-acid battery industrial effluent, mixed industrial effluent and fresh tap water (chlorinated) as drinking water in comparison to control (dechlorinated) water sample (aged tap water). The Chironomus larvae were kept in three different experimental chambers (perforated wall test vessels) with the exposure of different water samples. These samples were made with no dilution, 50 % dilution, 2.5 % dilution and control water sample. The behavioral activities for larvae of Chironomus sp. were measured at 0h, 2h, 24h and 48 h in in-situ condition. The behavioral activities viz. crawling, looping, ventilation, paralyses and subsequently death of the larvae were recorded in the field condition. A significant differences (P < 0.05, P < 0.01 and P< 0.001) were observed with increasing time of exposure while in few cases the data were increased without significance level. It was recorded that after exhibiting behavioural activities viz. crawling, looping, ventilation and paralyses finally all species were died 100 % of the population in lead acid battery effluent following both 24h and 48hr exposure. In addition, death of larvae were 70 % in mixed industrial effluent and 50 % in fresh tap water (chlorinated) after 48h exposure as compared to control sample water. In conclusion, the present results indicate that the larvae of Chironomous sp. are suitable indicators in the evaluation of the effluent quality in the studied stream, potential to know by behavioural toxicological study for heavy metals and organic pollution. Although it is a preliminary observation by assessing behavioural toxicology but future study in relation to biochemical and genetic damage of Chironomous larvae with the exposure of toxic water samples will provide bigger view.
12
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Survey of indoor air pollution and health symptoms at residential buildings

71%
Sarkar S., Nandy A., Talapatra S. N., Basu R., Mukhopadhyay A.
International Letters of Natural Sciences
|
2014
|
tom 08
|
nr 1
This survey work summarizes the generation of indoor air pollutants (IAPs) through household products and activities and also the probable health symptoms of IAPs were discussed through questionnaire in the residential buildings of urban and semi urban area when compared to rural (control) area by door to door survey. The IAPs are categorized as physical, chemical and biological and surveyed as per the product(s) usage in the closed room of buildings. The survey results of IAPs generated from household products and activities, these are asbestos, fine particulate matters and ash as physical pollutants. The chemical pollutants are carbon mono and di oxide gases, phthalates; DDT, chlordane, heptachlor, o-phenylphenol; PBDEs, Formaldehyde, Other Aldehydes, lead, benzene, chloroform, para-dichlorobenzene, methylene chloride, perchloroethylene, styrene, benzene, formaldehyde, terpenes, styrene, phthalate esters, toluene, Propellant, pesticides, PAH, NOx, acrylamide, VOCs, acetone, HCl gas and biological pollutants are bacteria, fungi, viruses, house dust mites, animal dander; cockroaches, microbial spore. In respect to established health impact data, the health symptoms were recorded after survey in two areas viz. urban and semi urban area. The health symptoms were recorded as eye, nose, and throat irritation; allergic reactions, respiratory irritation, aggravated asthma, influenza and other infectious diseases may be the generation of IAPs. The urban and semi urban area are compared with rural (control) area in which no symptoms were found as per discussion. In the present survey it was concluded that the generation of IAPs may from household products and activities in the urban and semi urban area due to less ventilation facilities when compared to rural (control) area. This is a preliminary observation, further researches are needed in relation to measurement of physical, chemical and biological indoor pollutants in closed room of residential buildings and also health hazards study of residents by haematological, biochemical, enzymological and genotoxicological parameters.
13

Roles of thyroid, adrenal and pancreatic hormones on thyroid activity of the soft-shelled turtles Lissemys punctata punctata Bonnoterre

71%
Ray P. P., Sarkar S., Sengupta A., Chaudhuri-Sengupta S., Maiti B. R.
Folia Biologica
|
2006
|
tom 54
|
nr 3-4
14
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

A study on the occurrence of Asian open bill stork, Anastomus oscitans in particular tree species at Nature Park, Kolkata, India

61%
Das A., Sarkar S., Banerjee K., Nandy A., Talapatra S. N., Swarnakar S.
International Letters of Natural Sciences
|
2014
|
tom 22
The trees support many bird and animal species while the survival of urban-dwelling species e.g. bird species dominate over others. This particular Nature park in Kolkata is the habitat of birds and fish species suggesting a better environment for food chain maintenance. The Asian open bill stork, Anastomus oscitans among other bird species is a common and provides ecosystem health indicator. The present study aims to understand the occurrence and population nos. of Asian open bill stork on particular tree species surrounding wetlands at Nature Park, Kolkata, India. Our results clearly indicate that a total population of this bird species having 671 nos. on the particular trees but not in all other available trees in the study area. In conclusion, present research emphasizes a novel occurrence and higher population of the A. oscitans being observed on the basis of the presence of particular tree species, though no attempt has been made on physico-chemical properties of present water and microclimate within the park. Therefore, further research planning should be oriented considering the physico-chemical impacts as well as local microenvironment along with human interaction as visitors in such a way so that these barriers cannot affect nesting and breeding of those species as eco-indicator. Also further relevant research is needed to emphasize on the conservation of these specific tree species to increase population of Asian open bill stork, A. oscitans in Nature park.
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