Effects of different salinity levels on larval growth and development of disease vectors of Culex species

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dc.contributor.authorBalasubramanian, R.en_US
dc.contributor.authorSahina, S.en_US
dc.contributor.authorNadh, V. Arathyen_US
dc.contributor.authorSreelekha, K.P.en_US
dc.contributor.authorNikhil, T.L.en_US
dc.date.accessioned2020-11-18T10:16:20Z
dc.date.available2020-11-18T10:16:20Z
dc.date.issued2019-09
dc.description.abstractAim: To determine species distribution of mosquitoes in coastal brackish wetlands and in paddy field area of Kerala along with the effect of increased salinity on the development and survival of major Japanese encephalitis vectors. Methodology: Mosquito survey was carried out in different sites of coastal brackish water as well as in paddy fields of Alappuzha district. First instar larvae were reared until adult emergence at different constant saline water. Each individual was monitored daily for mortality. Larvae were placed in a plastic container with 200 ml distilled water, which served as controls. Counts of larvae, pupae and adults were recorded every 24 hr up to adult emergence. Results: The collected mosquitoes were Culex tritaeniorhynchus, Cx. gelidus, Cx. sitiens, Cx. quinquefasciatus, Cx. bitaeniorhynchus and Anopheles vagus. During summer season, Cx. sitiens (92.85%) was the predominant species followed by Cx. tritaeniorhynchus (2.97%) and Cx. gelidus (2.25%). In saline tolerant study, the maximum adult emergence occurred at 5 parts per thousand. The number of larvae surviving till adult stage decreased progressively with increased salinity. The wing size decreased significantly with increasing salinities, except those reared in 5ppt. Interpretation: The present study demonstrates that these three mosquitoes have the ability to oviposit and breed in brackish water. The study also reveals the health risks associated with vector mosquitoes developing and their frequency of abundance in brackish water, particularly in the context of rising sea levels due to global warming.en_US
dc.identifier.affiliationsNational Institute of Virology-Kerala Unit,Alappuzha–688 005, Indiaen_US
dc.identifier.citationBalasubramanian R., Sahina S., Nadh V. Arathy, Sreelekha K.P., Nikhil T.L.. Effects of different salinity levels on larval growth and development of disease vectors of Culex species. Journal of Environmental Biology . 2019 Sep; 40(5): 1115-1122en_US
dc.identifier.issn0254-8704
dc.identifier.issn2394-0379
dc.identifier.placeIndiaen_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/214635
dc.languageenen_US
dc.publisherTriveni Enterprisesen_US
dc.relation.issuenumber5en_US
dc.relation.volume40en_US
dc.source.urihttps://www.jeb.co.in/journal_issues/201909_sep19/paper_19.pdfen_US
dc.subjectBrackish wateren_US
dc.subjectCulex mosquitoen_US
dc.subjectJapanese encephalitisen_US
dc.subjectSalinity levelsen_US
dc.titleEffects of different salinity levels on larval growth and development of disease vectors of Culex speciesen_US
dc.typeJournal Articleen_US
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