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Tyagi, B. K.
- Studies on the Maintenance of 'Self-Sustained' Mosquito Vector Population in Vaigai River, South India
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Authors
Affiliations
1 Department of Plant Sciences, Madurai Kamaraj University, Madurai-625 021, IN
2 Centre for Research in Medical Entomology (ICMR), Madurai-625 002, IN
1 Department of Plant Sciences, Madurai Kamaraj University, Madurai-625 021, IN
2 Centre for Research in Medical Entomology (ICMR), Madurai-625 002, IN
Source
Current Science, Vol 110, No 1 (2016), Pagination: 57-68Abstract
Study of mosquito species diversity and its relationship with ecosystems is essential to understand disease epidemiology and to develop control measures of vector populations in human-dominated ecosystems. In the present study, the structure and composition of immature mosquito population and associated ecological parameters were analysed in three different ecosystems (urban, semi-urban and rural) along Vaigai river, Madurai, Tamil Nadu, India. Average larval density was higher in urban than the semi-urban and rural sites during the study period. In 2012-13, immature mosquito diversity was higher in rural site during pre-monsoon and monsoon seasons, whereas mosquito larval diversity was greater in semi-urban site during the post-monsoon season. In 2013-14, mosquito larval diversity was found to be high in semi-urban site during monsoon and post-monsoon seasons. Culicine species dominated the urban areas, while Anopheline species dominated the rural and semi-urban sites during the study period. Among the mosquito species, Culex tritaeniorhynchus, Cx. geldius, Cx. vishnuvi, Cx. quinquefasciatus, Cx. bitaeniorhynchus, Anopheles subpictus and An. culicifacies were prevalent throughout the year. Filamentous algal-dominated sites showed a higher number of mosquito species (23 species) than other hydrophytes-dominated sites. Maximum number of sewage inlets was recorded in urban than the other two sites. As a result, the highest turbidity level was recorded in the urban site followed by semi-urban and rural sites. The present study shows that the immature mosquito population is maintained with the help of ecological parameters in all the study sites throughout the year. Therefore, it is essential to take steps to eradicate the mosquito vectors from the Vaigai river basin to avoid disease outbreak in the region.Keywords
Animal Husbandry, Aquatic Vegetation, Larval Density, Sewage Inlets, Water Quality.Full Text
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- Radio Serial on Climate Change and Global Warming
Abstract Views :257 |
PDF Views:77
Authors
Affiliations
1 Vigyan Prasar, A-50, Institutional Area, Sector-62, Noida 201 309, IN
1 Vigyan Prasar, A-50, Institutional Area, Sector-62, Noida 201 309, IN
Source
Current Science, Vol 116, No 10 (2019), Pagination: 1624-1625Abstract
Climate change is now a reality. The fact has been supported by a plethora of literature published in the last decade. Some of the observable effects on the environment are already visible. The scientific community across the globe is confident that global temperature will continue to rise in the future, mainly due to the emission of greenhouse gases produced as a result of anthropogenic activities. Intergovernmental Panel on Climate Change (IPCC) has predicted that increase in global mean temperature of less than 1– 3°C above 1990 levels will produce beneficial impacts in some regions and harmful ones in others, but ‘taken as a whole’, ‘the range of published evidence indicates that the net damage costs of climate change are likely to be significant and to increase over time’1,2.Full Text
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