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Mitra, A.
- Pesticide Pollution in Aquatic Ecosystem
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Authors
Affiliations
1 Department of Zoology, Bankura Christian College, Bankura, West Bengal, IN
1 Department of Zoology, Bankura Christian College, Bankura, West Bengal, IN
Source
Journal of Environment and Sociobiology, Vol 12, No Sp Iss (2015), Pagination: 4-4Abstract
Aquatic ecosystem including freshwater-, estuarine- and marine-ecosystem provides shelter, food, nursery and breeding places to a vast number of animals ranging from protozoa to mammals. This ecosystem also influences the life of terrestrial animals through food chain and direct consumption of water. Pesticide pollution is a case of concern for aquatic ecosystem as well as aquatic life. The use of pesticides mainly for increasing crop production and for preventing insect-borne diseases has been increased dramatically. In fact, Indian economy is now largely dependent on use of pesticides in sectors like public health, forestry and agriculture. Effect of such pesticides has been studied on various groups of vertebrates and to some extent on invertebrates. Presence of pesticides in the body of penguin and the breast milk of human has warned us about the magnitude of the problem.However, pesticides are not target specific. Toxicity develops in non-target organisms due to constant exposure to pesticides. Major portion of pesticide finally reaches aquatic ecosystem and gets accumulated in other organisms through food chain. Significant level of pesticide in fresh water system is reported from various parts of India. The present communication attempts to review the threats of pesticides, viz., chlorofluorocarbons, organophosphates and carbonates on aquatic resources and its consequences on animal life particularly of fish, birds and mammals including human in India. It also highlights the impact of pesticide pollution on human civilization and human welfare.
- Bioaccumulation Pattern of Heavy Metals in Fish Juveniles of Indian Sundarbans
Abstract Views :245 |
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Authors
Affiliations
1 Department of Marine Science, Calcutta University, 35. B.C. Road, Kolkata–700 019, IN
2 Department of Microbiology, Panskura Banamali College, Purba Midnapore, Midnapore, IN
1 Department of Marine Science, Calcutta University, 35. B.C. Road, Kolkata–700 019, IN
2 Department of Microbiology, Panskura Banamali College, Purba Midnapore, Midnapore, IN
Source
Journal of Environment and Sociobiology, Vol 6, No 2 (2009), Pagination: 151-158Abstract
Coastal environment of West Bengal, recognized as the most diversified and productive ecosystem among all the maritime states of India, faces pollution from domestic sewage and urban and industrial effluents leading to serious impacts on biota. These organic and inorganic wastes containing heavy metals mainly originate from the city of Kolkata, Howrah and the newly developing Haldia port-cumindustrial complex. Most abundant heavy metals in the estuarine complex are Zn, Cu and Pb. The present paper aims to highlight the level of these heavy metals in juveniles of ten commercially important species of finfish collected from the aquatic subsystem of western Indian Sundarbans, a Gangetic delta in the north-east coast of the Indian sub-continent. The heavy metals accumulated in the juvenile fish muscles in the order Zn > Cu > Pb. Significant temporal variations of Zn and Cu level in the fish muscles were observed between years, but in case of Pb such variation was not observed. The accumulation of heavy metals in the selected fish muscles exhibited significant species specificity as revealed from the ANOVA results.Keywords
Estuary, Accumulation of Heavy Metals, Fish Juveniles.- Molluscan Community around Digha Coast, West Bengal, India
Abstract Views :218 |
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Authors
Affiliations
1 Department of Marine Science, University of Calcutta, 35, B. C. Road, Koli^ata-700019, IN
1 Department of Marine Science, University of Calcutta, 35, B. C. Road, Koli^ata-700019, IN
Source
Journal of Environment and Sociobiology, Vol 2, No 1-2 (2005), Pagination: 43-47Abstract
The present paper deals with the molluscan community of Digha coast, comprising of 90 species belonging to 46 families. It includes 54 species of gastropods. 2 species of scaphopods, 29 species of bivalves and 5 species of cephaiopods. In this coast premonsoon season seems to be ideal in so far as molluscan biodiversity is concerned.Keywords
Molluscan Community, Digha Coast- Studies on the Microbial Load in Sea Water, Sediment and Edible Oyster (Saccostrea Cucullata) from Indian Sundarbans
Abstract Views :233 |
PDF Views:0
Authors
Affiliations
1 Department of Microbiology, Vidyasagar University, Paschim Medinipur West Bengal, IN
2 Department of Marine Science, University of Calcutta 35, B.C. Road, Kolkata –700019, IN
1 Department of Microbiology, Vidyasagar University, Paschim Medinipur West Bengal, IN
2 Department of Marine Science, University of Calcutta 35, B.C. Road, Kolkata –700019, IN
Source
Journal of Environment and Sociobiology, Vol 9, No 1 (2012), Pagination: 1-12Abstract
The edible oyster Saccostrea cucullata is widely available in the intertidal zone of coastal and estuarine areas of West Bengal. Now a days culturing of this species has opened the opportunity of alternative livelihood of coastal people. In this context, to evaluate the suitability of oyster harvesting sites and the quality of meat of this species in terms of microbial load, the present study targeted the analysis of microbial load of the ambient environment and the tissue of this edible oyster collected from the Indian Sundarbans. The total bacterial count (TBC), total coliform (TC), fecal coliform (FC) and E.coli of the oyster and its ambient environment were measured from three different stations (Namkhana, Frazergaunge and Sajnekhali) of Indian Sundarbans through standard plate count and MPN method respectively. These stations showed significant variation with respect to microbial load which is reflected in the tissue of this edible oyster. Significant positive correlation was obtained between microbial load of the ambient environment and the tissue of edible oyster. Relatively higher microbial concentration was observed in monsoon season (July to October) compare to other seasons, which may be related to storm water runoff and increased runoff from adjacent land masses.Keywords
Edible Oyster, Livelihood, Microbial Load, Total Bacterial Count, Total Coliform , Fecal Coliform, E. Coli.References
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