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
Chandrasekaran, S.
- On-Line Trade of Aesthetic Exotic Organisms: Sword of Damocles?
Abstract Views :344 |
PDF Views:149
Authors
Affiliations
1 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai, 625 021, IN
1 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai, 625 021, IN
Source
Current Science, Vol 109, No 8 (2015), Pagination: 1404-1410Abstract
Exotic organisms introduced into non-native ecosystems may invade and affect the native biodiversity, which might lead to serious ecological, economic and sociological threats. Among the various pathways of introduction of non-native species, on-line pet trading is the most recently emerged method which facilitates rapid introduction of exotic species. Though on-line trading has become an influential factor for the growth of world economy in the current scenario, its role in the introduction of exotic species and their subsequent consequences in countries like India is least studied. In this article we delineate the role of on-line trading in importing alien species to our doorsteps, which can cause serious threats to India's biodiversity and economy in near future. Our web survey revealed that 910 varieties of exotic fishes and 14 exotic animals are being sold through unregulated on-line trading in India. The number of exotic species recorded in this survey is not conclusive and may be the tip of the iceberg when compared to the ground reality in the country. Our interaction with the local people exposed that most of the sellers and buyers are naïve about the consequences of introducing these species into our native ecosystems. Our extensive field survey revealed that most of the exotic fishes were maintained in open tanks and no regulations were adopted to curtail their escape during maintenance of tanks, rains and floods. Greater abundance and biomass of Pterygoplichthys pardalis than the native edible fishes in freshwater ecosystem in Madurai, Tamil Nadu, South India is an example of invasion of ornamental fish into the wild. Bringing policy-level changes, multidimensional approaches to regulate on-line trade of exotic species will pave the way for protecting the native ecosystem from encroachment of exotic organisms.Keywords
Aquarium Trade, Biodiversity, Exotic Organisms, Invasion, On-Line Trade.References
- Simberloff, D. and Boecklen, W., Patterns of extinction in the introduced Hawaiian avifauna: a re-examination of the role of competition. Am. Nat., 1991, 138, 300–327.
- Scott, J. K. and Panetta, F. D., Predicting the Australian weed status of southern African plants. J. Biogeogr., 1993, 20, 87–93.
- Reichard, S. H. and Hamilton, C. W., Predicting invasions of woody plants introduced into North America. Conserv. Biol., 1997, 11, 193–203.
- Elton, C. S., The Ecology of Invasions by Animals and Plants, University of Chicago Press, London, 1958.
- Drake, D. A. and Mandrak, N. E., Least-cost transportation networks predict spatial interaction of invasion vectors. Ecol. Appl., 2010, 20, 2286–2299.
- Dehnen-Schmutz, K., Touza, J., Perrings, C. and Williamson, M., A century of the ornamental plant trade and its impact on invasion success. Divers. Distrib., 2007, 13, 527–534.
- Foxcroft, L. C., Richardson, D. M. and Wilson, J. R. U., Ornamental plants as invasive aliens: Problems and solutions in Kruger National Park, South Africa. Environ. Manage., 2008, 41, 32–51.
- Ruiz, G. M., Carlton, J. T., Grosholz, E. D. and Hines, A. H., Global invasions of marine and estuarine habitats by nonindigenous species: mechanisms, extent, and consequences. Am. Zool., 1997, 37, 621–632.
- Pimentel, D. et al., Economic and environmental threats of alien plant, animal, and microbe invasions. Agric. Ecosyst. Environ., 2001, 84, 1–20.
- Drake, J. A., Plant invasions: ecological and agricultural aspects. In Invasive Plants: Ecological and Agricultural Aspects (ed. Inderjit, S.), Birkhauser-Verlag AG, Switzerland, 2005, pp. 13–14.
- Pimentel, D., Zuniga, R. and Morrison, D., Update on the environmental and economic costs associated with alien-invasive species in the United States. Ecol. Econ., 2005, 52, 273–288.
- Chandrasekaran, S. and Swamy, P. S., Growth patterns of Chromolaena odorata in varied ecosystems at Kodayar in the Western Ghats, India. Acta Oecol., 2010, 36, 383–392.
- Chandrasekaran, S., Sundarapandian, S. M. and Swamy, P. S., Contribution of exotic weeds to plant community structure and primary production in successional fallows at Kodayar in Western Ghats of Tamil Nadu. Int. J. Ecol. Environ. Sci., 1997, 23, 381–388.
- Fuller, P. L., Nico, L. G. and Williams, J. D., Nonindigenous Fishes Introduced into Inland Waters of the United States, Special Publication, American Fisheries Society, Bethesda, USA, MD, 1999, vol. 27, p. 613.
- Crossman, E. J. and Cudmore, B. C., Summary of North American fish introductions through the aquarium/horticulture trade. In Nonindigenous Freshwater Organisms: Vectors Biology, and Impacts (eds Claudi, R. and Leach, J. H.), Lewis Publishers, Boca Raton, Florida, USA, 1999, pp. 129–133.
- Courtenay, W. R. and Stauffer, J. R., The introduced fish problem and the aquarium fish industry. J. World Aquacult. Soc., 1990, 21, 145–159.
- Fox, A. M., Gordon, D. R. and Stocker, R. K., Challenges of reaching consensus on assessing which non-native plants are invasive in natural areas. Hortic. Science, 2003, 38, 11–13.
- Duggan, I. C., Rixon, C. A. M. and MacIsaac, H. J., Popularity and propagule pressure: determinants of introduction and establishment of aquarium fish. Biol. Invasions, 2006, 8, 377–382.
- Rixon, C. A. M., Duggan, I. C., Bergeron, N. M. N., Ricciardi, A. and MacIsaac, H. J., Invasion risks posed by the aquarium trade and live fish markets on the Laurentian Great Lakes. Biodivers. Conserv., 2005, 14, 1365–1381.
- Ruiz, G. M., Carlton, J. T., Grosholz, E. D. and Hines, A. H., Global invasions of marine and estuarine habitats by nonindigenous species: mechanisms, extent and consequences. Am. Zool., 1997, 37, 621–632.
- Gois, K. S., Pelicice, F. M., Gomes, L. C. and Agostinho, A. A., Invasion of an Amazonian cichlid in the Upper Paraná River: facilitation by dams and decline of a phylogenetically related species. Hydrobiologia, 2015, 746, 401-413.
- Singh, A. K., Emerging alien species in Indian aquaculture: prospects and threats. J. Aquat. Biol. Fish., 2014, 2, 32–41.
- Chandrasekaran, S., Arun Nagendran, N., Pandiaraja, D., Krishnankutty, N. and Kamalakannan, B., Bioinvasion of Kappaphycus alvarezii on corals in the Gulf of Mannar, India. Curr. Sci., 2008, 94, 1167–1172.
- Hassan, M., Harmelin-Vivien, M. and Bonhomme, F., Lessepsian invasion without bottleneck: example of two rabbitfish species (Siganus rivulatus and Siganus luridus). J. Exp. Mar. Biol. Ecol., 2003, 291, 219–232.
- Bhakta, J. N. and Bandyopadhyay, P. K., Exotic fish biodiversity in Churni River of West Bengal, India. Electron. J. Biol., 2007, 3(1), 13–17.
- Singh, A. K., Pathak, A. K. and Wazir, S., Invasion of an exotic fish – common carp, Cyprinus carpio L. (Actinopterygii: Cypriniformes: Cyprinidae) in the Ganga River, India and its impacts. Acta Ichthyol. Piscat., 2010, 40(1), 11–19.
- Raghavan, R., Prasad, G., Anvar-Ali, P. H. and Pereira, B., Exotic fish species in a global biodiversity hotspot: observations from River Chalakudy, part of Western Ghats, Kerala, India. Biol. Invasions, 2008, 10, 37–40.
- Singh, A. K. and Lakra, W. S., Risk and benefit assessment of alien fish species of the aquaculture and aquarium trade into India. Rev. Aquacult., 2011, 3, 3–18.
- Lockwood, J. L., Simberloff, D., McKinney, M. L. and Von Holle, B., How many, and which, plants will invade natural areas. Biol. Invasions, 2001, 3, 1–8.
- Chandrasekaran, S., Saraswathy, K., Saravanan, S., Kamaladhasan, N. and Arun Nagendran, N., Impact of Prosopis juliflora on nesting success of breeding wetland birds at Vettangudi Bird Sanctuary, South India. Curr. Sci., 2014, 106, 676–678.
- Khetarpal, R. K. and Gupta, K., Plant biosecurity in India – status and strategy. Asian Biotechnol. Dev. Rev., 2007, 9, 83–107.
- Richardson, D. M., Allsopp, N., D’Antonio, C. M., Milton, S. J. and Rejmanek, M., Plant invasions – the role of mutualisms. Biol. Rev., 2000, 75, 65–93.
- Von Holle, B. and Simberloff, D., Ecological resistance to biological invasion overwhelmed by propagule pressure. Ecology, 2005, 86, 3212–3218.
- Pysek, P. and Richardson, D. M., Invasive species, environmental change and management, and health. Annu. Rev. Environ. Resour., 2010, 35, 25–55.
- Tamburri, M. N., Wasson, K. and Matsuda, M., Ballast water deoxygenation can prevent aquatic introductions while reducing ship corrosion. Biol. Conserv., 2002, 103, 331–341.
- McNeely, J. A., Kapoor-Vijay, P., Zhi, L., Olsvig-Whittaker, L., Sheikh, K. M. and Smith, A. T., Conservation biology in Asia: the major policy challenges. Conserv. Biol., 2009, 23, 805–810.
- Nunez, M. A. and Pauchard, A., Biological invasions in developing and developed countries: does one model fit all? Biol. Invasions, 2010, 12, 707–714.
- Colautti, R. I., In search of an operational lexicon for biological invasions. In Invasive Plants: Ecological and Agricultural Aspects (ed. Inderjit, S.), Birkhauser-Verlag AG, Switzerland, 2005, pp. 1–18.
- Miller, M., The paradox of U.S. alien species law. In Harmful Invasive Species: Legal Responses (eds Miller, M. and Fabian, R.), Environmental Law Institute, Washington, DC, USA, 2004, pp. 125–184.
- Simberloff, D., Parker, I. M. and Windle, P. N., Introduced species policy, management, and future research needs. Front. Ecol. Environ., 2005, 3, 12–20.
- Simberloff, D., Needs and opportunities. In Invasive Species Databases, Proceedings of a Workshop (eds Ridgway, R. L. et al.), US Departments of Interior, Agriculture, and Commerce, and C.V. Riley Memorial Foundation, Silver Spring, Maryland, USA, 1999, pp. 38–41.
- Niemiera, A. X. and Von Holle, B., Invasive plant species and the ornamental horticulture industry. In Management of Invasive Weeds (ed. Inderjit, S.), Springer Science, 2009, pp. 167–187.
- Rashid, I., Sharma, G. P., Esler, K. J., Reshi, Z. A., Khuroo, A. A. and Simpson, A., A standardized response to biological invasions. Science, 2009, 325, 146.
- Studies on the Maintenance of 'Self-Sustained' Mosquito Vector Population in Vaigai River, South India
Abstract Views :569 |
PDF Views:118
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.References
- Dudgeon, D. et al., Freshwater biodiversity: importance, threats, status and conservation challenges. Biol. Rev., 2006, 81, 163–182.
- Doll, P., Fiedler, K. and Zhang, J., Global scale analysis of river flow alteration due to water withdrawals and reservoirs. Hydrol. Earth Syst. Sci., 2009, 13, 2413–2432.
- CPCB, Water quality status and statistics (1993 and 1994): monitoring of Indian aquatic resources (MINARS/10/1995–1996), Central Pollution Control Board, New Delhi, 1996, p. 459.
- Nilsson, C., Reidy, C. A., Dynesius, M. and Revenga, C., Fragmentation and flow regulation of the world’s largest river system. Science, 2005, 308, 405–408.
- Balamurugan, C. and Leena Hebsibai, L., Studies on the pollution potential of Vaigai river at Madurai, India. Asian J. Res. Chem., 2012, 5, 1108–1112.
- Rengasamy, R., Bridges-in-Vaigai-River, 2009; http://www.scribd. com/doc/11523096/Bridges-in-Vaigai-River
- Jeyachandran, A., Krishnan, N. and Jeyakumar, G., Observations on the loss of biomass of Eichhornia crassipes in the river bed of Vaigai, Tamil Nadu. J. Ecobiol., 1994, 6, 153–155.
- Jeyachandran, A., Krishnan, N. and Jeyakumar, G., Performances of Ipomoea cornea in river Vaigai in relation of pollution: a quantitative morphological study. J. Ecobiol., 1993, 5, 221–223.
- Jeyachandran, A., Krishnan, N. and Jeyakumar, G., Further studies on plants in River Vaigai, South India in relation to pollution; performances of Eichhornia crassipes. Poll. Res., 1993, 12, 113– 115.
- Roshinebegam, K., Selvakumar, S., Murugan, K. and Indumathi, R., Analysis of water quality in different sampling sites of Vaigai river, Tamil Nadu, India. J. Biosci. Res., 2013, 4, 46–53.
- Krishnan, N. and Sujatha, T. R., A qualitative study on facial pollution by human defaecation in a south Indian river. In Ecology of Polluted Water Vol. II (ed. Arvind Kumar), APH Corporation, New Delhi, 2002, pp. 785–791.
- Anandavalli, M., Water Pollution in Madurai: Yesterday, Publication Division, Madurai Kamaraj University, Madurai, 1986, p. 192.
- Nabar, B. M., Shepaal, K. B., Lele, H. M. and Lokegaonkar, S. P., Statistical survey of mosquito vectors in the vicinity of Waldhun water body, District Thane – India. West African J. Appl. Ecol., 2011, 9, 139–149.
- Pant, C. P., Vectors of Japanese encepalitis and their bionomics. WHO/VBC/79, 1979, 732, 1–18.
- Mwangangi, J. M. et al., Anopheles larval abundance and diversity in three rice agro-village complexes Mwea irrigation scheme, Central Kenya. Malar. J., 2010, 9, 228–238.
- Aditya, G., Premanik, M. K. and Saha, G. K., Larval habitats and species composition of mosquitoes in Darjeeling Himalayas, India. J. Vector. Borne Dis., 2006, 43, 7–15.
- Sattler, M. A., Mtasiwa, D., Kiama, M., Premji, Z., Tanner, M., Killeen, G. F. and Lengeler, C., Habitat characterization and spatial distribution of Anopheles sp. mosquito larvae in Dares Salaam (Tanzania) during an extended dry period. Malar. J., 2005, 4, 4–18.
- Blaustein, L. and Kotler, B. P., Oviposition habitat selection by the mosquito Culiseta longiareolata: effects of conspecifics, food and green toad tadpoles. Ecol. Entomol., 1993, 18, 104–108.
- Angelon, K. A. and Petranka, J. W., Chemicals of predatory mosquitofish (Gambusia affinis) influence selection of oviposition site by Culex mosquitoes. J. Chem. Ecol., 2002, 28, 797–806.
- Manda, H., Gouagna, L. C., Foster, W. A., Jackson, R. R., Beier, J. C., Githure, J. I. and Hassanali, A., Effect of discriminative plant-sugar feeding on the survival and fecundity of Anopheles gambiae. Malar. J., 2007, 6, 103–111.
- Stone, C. M., Jackson, B. T. and Foster, W. A., Effects of plantcommunity composition on the vectorial capacity and fitness of the malaria mosquito Anopheles gambiae. Am. J. Trop. Med. Hyg., 2012, 87, 727–736.
- Reuben, R., Thenmozhi, V., Samuel, P., Gajanana, A. and Mani, T., Mosquito blood feeding patterns as a factor in the epidemiology of Japanese encephalitis in southern India. Am. J. Trop. Med. Hyg., 1992, 46, 654–663.
- Ejtehadi, H., Sepehri, A. and Akefi, H. R., Measuring Way of Biodiversity, Mashhad Ferdowsi Publications University, Mashhad, Iran, 2009, p. 229.
- Pielou, E. C., The measurement of diversity in different types of biological collections. J. Theor. Biol., 1966, 13, 131–144.
- Margalef, R., Temporal succession and spatial heterogeneity in phytoplankton. In Perspectives in Marine Biology (ed. BuzzatiTraverso), University of California Press, Berkeley, 1958, pp. 323–347.
- Patz, J. A., Graczyk, T. K., Geller, N. and Vittor, A. Y., Effects of environmental change on emerging parasitic diseases. Int. J. Parasitol., 2000, 30, 1395–1405.
- Gimnig, J. E., Ombok, M., Kamau, L. and Hawley, W. A., Characteristics of larval anopheline (Diptera: Culicidae) habitats in western Kenya. J. Med. Entomol., 2001, 38, 282–288.
- Chinery, W. A., Effects of ecological changes on the malaria vectors Anopheles funestus and the Anopheles gambiae complex of mosquitoes in Accra, Ghana. J. Trop. Med. Hyg., 1984, 87, 75–81.
- Guo, Q. H., Ma, K. M., Yang, L., Cai, Q. H. and He, K., A comparative study of the impact of species composition on a freshwater phytoplankton community using two contrasting biotic indices. Ecol. Indic., 2010, 10, 296–302.
- Mapira, J. and Mungwini, P., River pollution in the city of Masvingo: a complex issue. Zambezia, 2005, 32, 95–106.
- Cole, J. J., Findlay, S. and Pace, M. L., Bacterial production in fresh and saltwater ecosystems: a cross overview. Mar. Ecol. Prog. Ser., 1988, 43, 1–10.
- Sunish, I. P. and Reuben, R., Factors influencing the abundance of Japanese encephalitis vectors in rice fields in India. II. Biotic. J. Med. Entomol., 2002, 16, 1–9.
- Bond, J. G., Arredondo-Jimenez, J. I., Rodriguez, M. H., QuirozMartinez, H. and Willwams, T., Oviposition habitat selection for a predator refuge and food source in a mosquito. Ecol. Entomol., 2005, 30, 255–263.
- Gimnig, J. E. et al., Density-dependant development of Anopheles gambiae (Diptera: Culicidae) larvae in artificial habitats. J. Med. Entomol., 2002, 39, 162–172.
- Kant, R., Pandey, S. D. and Sharma, S. K., Mosquito breeding in relation to aquatic vegetation and some physico-chemical parameters in rice fields of central Gujarat. Indian J. Malariol., 1996, 33, 30–40.
- Rejmankova, E. et al., Environmental and regional determinants of Anopheles (Diptera: Culicidae) larval distribution in Belize, Central America. Environ. Entomol., 1993, 22, 978–992.
- Savage, H. M., Rejmankova, E., Arredondo Jimenez, J. I., Roberts, D. R. and Rodriguez, H., Limnological and botanical characterization of larval habitats for two primary malarial vectors, Anopheles albimanus and An. pseudopunctipennis, in coastal areas of Chiapas State, Mexico. J. Am. Mosq. Control Assoc., 1990, 6, 612–620.
- Bond, J. G., Rojas, J. C., Arredondo-Jiménez, J. I., QuirozMartínez, H., Valle, J. and Williams, T., Population control of the malaria vector Anopheles pseudopunctipennis by habitat manipulation. Proc. R. Soc. London, Ser. B, 2004, 271, 2161–2169.
- Femandez-Salas, I., Roberts, D. R., Rodriguez, M. H. and MarinaFernandez, C., Bionomics of larval populations of Anopheles pseudopunctipennis in the Tapachula foothills area, southern Mexico. J. Am. Mosq. Control. Assoc., 1994, 10, 477–486.
- Opoku, A. A., Ansa-Asare, O. D. and Amoako, J., The occurrences and habitat characteristics of mosquitoes in Accra, Ghana. West Afr. J. Appl. Ecol., 2007, 11, 81–86.
- Walton, W. E., Schreiber, E. T. and Mulla, M. S., Distribution of Culex tarsalis larvae in a freshwater marsh in Orange County, California. J. Am. Mosq. Control Assoc., 1990, 6, 539–543.
- Greenway, M., Suitability of macrophytes for nutrient removal from surface flow constructed wetlands receiving secondary treated effluent in Queensland, Australia. Water Sci. Technol., 2003, 48, 121–128.
- Mutuku, F. M. et al., A supervised land cover classification of a western Kenya lowland endemic for human malaria: associations of land cover with larval Anopheles habitats. Int. J. Health Geogr., 2009, 8, 19–31.
- Bhattacharyya, D. R. et al., Host feeding patterns of Culex vishnui sub group of mosquitoes in Dibrugarh district of Assam. J. Commun. Dis., 1994, 26, 133–138.
- Arunachalam, N., Samuel, P. P., Hiriyan, J., Thenmozhi, V. and Gajanana, A., Japanese encephalitis in Kerala, South India: can Mansonia (Diptera: Culicidae) play a supplemental role in transmission? J. Med. Entomol., 2004, 41, 456–461.
- Zinser, M., Ramberg, F. and Willott, E., Culex quinquefasciatus (Diptera: Culicidae) as a potential West Nile virus vector in Tucson, Arizona: blood meal analysis indicates feeding on both humans and birds. J. Insect Sci., 2004, 4, 1–3.
- Hasegawa, M., Tuno, N., Yen, N. T., Nam, V. S. and Takagi, M., Influence of the distribution of host species on adult abundance of Japanese encephalitis vectors Culex vishnui subgroup and Culex gelidus in a rice-cultivating village in northern Vietnam. Am. J. Trop. Med. Hyg., 2008, 78, 159–168.
- Impact of Prosopis juliflora on Nesting Success of Breeding Wetland Birds at Vettangudi Bird Sanctuary, South India
Abstract Views :338 |
PDF Views:137
Authors
Affiliations
1 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
2 Thiagarajar College, Madurai 625 009, IN
3 School of Energy Sciences, Madurai Kamaraj University, Madurai 625 021, IN
1 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
2 Thiagarajar College, Madurai 625 009, IN
3 School of Energy Sciences, Madurai Kamaraj University, Madurai 625 021, IN
Source
Current Science, Vol 106, No 5 (2014), Pagination: 676-678Abstract
No Abstract.- Impact of Removal of Invasive Species Kappaphycus alvarezii from Coral Reef Ecosystem in Gulf of Mannar, India
Abstract Views :295 |
PDF Views:143
Authors
B. Kamalakannan
1,
J. Joyson Joe Jeevamani
1,
N. Arun Nagendran
2,
D. Pandiaraja
2,
S. Chandrasekaran
3
Affiliations
1 Department of Botany, National Centre of Excellence in Statistical and Mathematical Modelling in Bioresources Management (MHRD), Thiagarajar College, Madurai 625 009, IN
2 National Centre of Excellence in Statistical and Mathematical Modelling in Bioresources Management (MHRD), Thiagarajar College, Madurai 625 009, IN
3 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
1 Department of Botany, National Centre of Excellence in Statistical and Mathematical Modelling in Bioresources Management (MHRD), Thiagarajar College, Madurai 625 009, IN
2 National Centre of Excellence in Statistical and Mathematical Modelling in Bioresources Management (MHRD), Thiagarajar College, Madurai 625 009, IN
3 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
Source
Current Science, Vol 106, No 10 (2014), Pagination: 1401-1408Abstract
Kappaphycus alvarezii is a commercially important red alga being intentionally introduced in marine waters worldwide for the production of kappa carrageenan. Its introduction into the Gulf of Mannar Biosphere Reserve during the 1990s and its subsequent escape from cultivation sites have paved the way for its invasion into the coral reef ecosystem of Kurusadai Island. Since the report of its invasion in 2008, removal of K. alvarezii from the reefs has been started by means of manual removal (hand plucking). This article details the unsuccessful attempt and negative impact of the eradication programme. Regrowth of K. alvarezii from removal points and drifting broken fragments resulting during removal have led to further establishment in the reef environment. Variation in the morphology of K. alvarezii populations after their removal has been observed. A significant reduction in the cover of coral and native algae due to the increase in abundance of K. alvarezii was evident from the study. The need for immediate scientific control measures to eradicate the invasive alga is discussed.Keywords
Coral Reefs, Gulf of Mannar, Invasive Species, Kappaphycus alvarezii, Manual Removal.- Response
Abstract Views :333 |
PDF Views:120
Authors
Affiliations
1 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
1 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
Source
Current Science, Vol 108, No 11 (2015), Pagination: 1974-1974Abstract
No Abstract.- Graph Theoretical Modelling and Analysis of Fragile Honey Bee Pollination Network
Abstract Views :436 |
PDF Views:160
Authors
Affiliations
1 National Centre of Excellence, Statistical and Mathematical Modelling on Bioresources Management (MHRD), Thiagarajar College, Madurai 625 009, IN
2 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
3 Department of Mathematics,Thiagarajar College, Madurai 625 009, IN
1 National Centre of Excellence, Statistical and Mathematical Modelling on Bioresources Management (MHRD), Thiagarajar College, Madurai 625 009, IN
2 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
3 Department of Mathematics,Thiagarajar College, Madurai 625 009, IN
Source
Current Science, Vol 107, No 12 (2014), Pagination: 1988-1996Abstract
Due to environmental stress honey bees frequently make foraging shifts. Encounter with any nonflowering agent during such shifts leads to colony collapse. To assess the impact of non-flowering agents in the pollination network, we have modelled the pollination network as polligraphs using graph theoretical tools. Based on the outcome of the model we have extracted a few new network parameters and characterized the stability of the pollination network.Keywords
Honey Bees, Non-Flowering Agent, Polligraph, Pollination Network.- Hiriyakkanavar Junjappa (1936–2021)
Abstract Views :266 |
PDF Views:104
Authors
Affiliations
1 Department of Organic Chemistry, Indian Institute of Science, Bengaluru 560 012, India, IN
2 Department of Chemistry, Indian Institute of Science Education and Research, Pune 411 008, India, IN
1 Department of Organic Chemistry, Indian Institute of Science, Bengaluru 560 012, India, IN
2 Department of Chemistry, Indian Institute of Science Education and Research, Pune 411 008, India, IN
Source
Current Science, Vol 122, No 1 (2022), Pagination: 107-108Abstract
No Abstract.Keywords
No Keywords.- Exploring Activity Concentration Measurements of Environmental Samples Containing Heavy Metals and their Remediation
Abstract Views :21 |
Authors
Affiliations
1 Environmental Assessment Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, IN
1 Environmental Assessment Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, IN
Source
Current Science, Vol 127, No 1 (2024), Pagination: 43-49Abstract
In the present article, a methodology has been discussed to evaluate the influence of activity concentration of soil samples containing heavy metals in the environment. The approach leverages a simulated germanium detector and a cylindrical geometry sample configuration to analyse soil samples with varying densities. The results showed a positive correlation between the soil densities and activity concentration, with an average correlation coefficient of 0.99 indicating that variations in density affect the activity concentration measurements. To mitigate this error, a demonstration of the self-absorption correction as a function of density, being an essential part of the present study has been included.Keywords
Activity concentration, density, detector, natural radioactivity, self-absorption.Full Text
- Are National Level Conferences 'End of Season Sales'?
Abstract Views :450 |
PDF Views:125
Authors
Affiliations
1 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
1 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
Source
Current Science, Vol 110, No 7 (2016), Pagination: 1134-1135Abstract
If you are a researcher or a postgraduate student, then you are likely to see invitations hanging on the notice boards to participate in a conference/symposium/workshop throughout the year. This is also seasonal and reaches its peak post-winter. Originally and still we believe that these academic gatherings are organized to exchange research ideas and results on specific themes. Balaram had highlighted the role of conferences and meetings, seminars and symposia, congress and conventions on the development of science. He had also raised concerns about the proliferation of conferences without meaningful discussions.- Influence of Flower Colour and Seasonality on Plant Invasion Success
Abstract Views :341 |
PDF Views:151
Authors
Affiliations
1 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
2 Department of Biological Sciences, ASSEFA College of Education, Madurai 625 702, IN
1 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
2 Department of Biological Sciences, ASSEFA College of Education, Madurai 625 702, IN
Source
Current Science, Vol 111, No 4 (2016), Pagination: 617-619Abstract
The ecological factors and mechanisms that determine the bioinvasion success of exotic plant species have become a cause celebre in current ecological research as witnessed by the many leading hypotheses and articles published. In pursuit of understanding invasive plants, while mining the Global Invasive Species Database, we found that a large number of invasive plants are characterized by flower colour polymorphism and multi-seasonal flowering. An effort has been made here to find out if these two traits have any role in invasiveness in plants.- An Expedition from ‘Time-Pass Research’ to Innovative Research
Abstract Views :447 |
PDF Views:118
Authors
Affiliations
1 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
1 Department of Plant Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, IN
Source
Current Science, Vol 113, No 07 (2017), Pagination: 1222-1223Abstract
Human society is under severe threat from the problems triggered by natural as well as human-mediated activities. Providing solutions to these emerging problems by the conventional way of thinking is largely insufficient to meet these challenges. Therefore, innovative research is mandatory to efficiently tackle them. The problems faced by developing countries, particularly India, are different from those of the developed nations. At this juncture, it is highly expected from Indian researches to find suitable solutions through innovative research.References
- Marvin Herndon, J., Cur. Sci., 2015, 108, 1967–1968.
- Chandrasekaran, S., Arun Nagendran, N., Krishnankutty, N., Pandiaraja, D., Saravanan, S., Kamaladhasan, N. and Kamalakannan, B., Curr. Sci., 2011, 101, 1262.
- John van Wyhe (ed.), The Complete Work of Charles Darwin Online, 1 August 2016; http://darwin-online.org.uk/ (accessed on 28 September 2017).
- Uma Shaanker, Curr. Sci., 2015, 109, 1549–1550.
- Sambasiva Swaminathan (1923–2020)
Abstract Views :299 |
PDF Views:112
Authors
Affiliations
1 Department of Organic Chemistry, Indian Institute of Science, Bengaluru 560 012, IN
2 #007, Block 1, Serene Urbana, Kannamangala, Bengaluru 562 110, IN
1 Department of Organic Chemistry, Indian Institute of Science, Bengaluru 560 012, IN
2 #007, Block 1, Serene Urbana, Kannamangala, Bengaluru 562 110, IN