Sublethal and transgenerational effects of alphamethrin on life history traits of Anopheles stephensi (Diptera: Culicidae), a malaria mosquito
Anopheles stephensi Liston (Diptera: Culicidae), an urban malaria vector in India, is controlled by insecticides. Sublethal concentrations can be effective in reducing mosquito populations and disease transmission by reducing its reproductive fitness. In this study, sublethal effects of alphamethrin...
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| Veröffentlicht in: | Canadian entomologist 2017-04, Vol.149 (2), p.251-264 |
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| description | Anopheles stephensi Liston (Diptera: Culicidae), an urban malaria vector in India, is controlled by insecticides. Sublethal concentrations can be effective in reducing mosquito populations and disease transmission by reducing its reproductive fitness. In this study, sublethal effects of alphamethrin, a synthetic pyrethroid, were assessed on selected fitness parameters. Late third instars of the Goraguntepalya strain, Bangalore, were exposed to three sublethal doses, LC10 – 0.00006, LC30 – 0.0004, and LC50 – 0.0014 mg/L and their effects on fecundity, egg hatchability, sex ratio, and longevity in parental, F1 and F2 generations. The morphology of gonads, pattern of pupation, and adult emergence were also assessed. We found a significant reduction in fecundity and hatchability among the sublethal concentrations as well as across generations. Survival analysis showed significant reduction in lifespan of exposed groups. Delay in pupation, eclosion, and no distortion in sex ratio was observed. The results suggest that sublethal concentrations of alphamethrin may have negative effects on exposed individuals and subsequent generations. |
| doi_str_mv | 10.4039/tce.2016.57 |
| format | Article |
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Sublethal concentrations can be effective in reducing mosquito populations and disease transmission by reducing its reproductive fitness. In this study, sublethal effects of alphamethrin, a synthetic pyrethroid, were assessed on selected fitness parameters. Late third instars of the Goraguntepalya strain, Bangalore, were exposed to three sublethal doses, LC10 – 0.00006, LC30 – 0.0004, and LC50 – 0.0014 mg/L and their effects on fecundity, egg hatchability, sex ratio, and longevity in parental, F1 and F2 generations. The morphology of gonads, pattern of pupation, and adult emergence were also assessed. We found a significant reduction in fecundity and hatchability among the sublethal concentrations as well as across generations. Survival analysis showed significant reduction in lifespan of exposed groups. Delay in pupation, eclosion, and no distortion in sex ratio was observed. The results suggest that sublethal concentrations of alphamethrin may have negative effects on exposed individuals and subsequent generations.</description><identifier>ISSN: 0008-347X</identifier><identifier>EISSN: 1918-3240</identifier><identifier>DOI: 10.4039/tce.2016.57</identifier><language>eng</language><publisher>New York, USA: Cambridge University Press</publisher><subject>Adults ; Agrochemicals ; Alcohol ; Animal husbandry ; Anopheles gambiae ; Anopheles stephensi ; Aquatic insects ; Bioassays ; Culicidae ; Diptera ; Disease transmission ; Eclosion ; Embryos ; Entomology ; Exposure ; Fecundity ; Fitness ; Genetics ; Gonads ; Hatchability ; History ; Human diseases ; Insect Management ; Insecticides ; Instars ; Life history ; Life span ; Malaria ; Mortality ; Mortality causes ; Mosquitoes ; Ova ; Parasites ; Parasitology ; Physiology ; Public health ; Pupation ; Pyrethroids ; Reduction ; Reproductive fitness ; Sex ; Sex ratio ; Studies ; Sublethal effects ; Survival analysis ; Toxicity tests ; Trends ; Vector-borne diseases</subject><ispartof>Canadian entomologist, 2017-04, Vol.149 (2), p.251-264</ispartof><rights>Entomological Society of Canada 2017</rights><rights>Copyright Entomological Society of Canada Apr 2017</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c327t-e34275883ab1bc2b9e4506298a974bf94e468202bfa7313586563843cf6239193</citedby><cites>FETCH-LOGICAL-c327t-e34275883ab1bc2b9e4506298a974bf94e468202bfa7313586563843cf6239193</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.cambridge.org/core/product/identifier/S0008347X16000572/type/journal_article$$EHTML$$P50$$Gcambridge$$H</linktohtml><link.rule.ids>164,314,780,784,27924,27925,55628</link.rule.ids></links><search><creatorcontrib>Hariprasad, T.P.N.</creatorcontrib><creatorcontrib>Shetty, N.J.</creatorcontrib><title>Sublethal and transgenerational effects of alphamethrin on life history traits of Anopheles stephensi (Diptera: Culicidae), a malaria mosquito</title><title>Canadian entomologist</title><addtitle>Can Entomol</addtitle><description>Anopheles stephensi Liston (Diptera: Culicidae), an urban malaria vector in India, is controlled by insecticides. Sublethal concentrations can be effective in reducing mosquito populations and disease transmission by reducing its reproductive fitness. In this study, sublethal effects of alphamethrin, a synthetic pyrethroid, were assessed on selected fitness parameters. Late third instars of the Goraguntepalya strain, Bangalore, were exposed to three sublethal doses, LC10 – 0.00006, LC30 – 0.0004, and LC50 – 0.0014 mg/L and their effects on fecundity, egg hatchability, sex ratio, and longevity in parental, F1 and F2 generations. The morphology of gonads, pattern of pupation, and adult emergence were also assessed. We found a significant reduction in fecundity and hatchability among the sublethal concentrations as well as across generations. Survival analysis showed significant reduction in lifespan of exposed groups. Delay in pupation, eclosion, and no distortion in sex ratio was observed. The results suggest that sublethal concentrations of alphamethrin may have negative effects on exposed individuals and subsequent generations.</description><subject>Adults</subject><subject>Agrochemicals</subject><subject>Alcohol</subject><subject>Animal husbandry</subject><subject>Anopheles gambiae</subject><subject>Anopheles stephensi</subject><subject>Aquatic insects</subject><subject>Bioassays</subject><subject>Culicidae</subject><subject>Diptera</subject><subject>Disease transmission</subject><subject>Eclosion</subject><subject>Embryos</subject><subject>Entomology</subject><subject>Exposure</subject><subject>Fecundity</subject><subject>Fitness</subject><subject>Genetics</subject><subject>Gonads</subject><subject>Hatchability</subject><subject>History</subject><subject>Human diseases</subject><subject>Insect Management</subject><subject>Insecticides</subject><subject>Instars</subject><subject>Life history</subject><subject>Life span</subject><subject>Malaria</subject><subject>Mortality</subject><subject>Mortality causes</subject><subject>Mosquitoes</subject><subject>Ova</subject><subject>Parasites</subject><subject>Parasitology</subject><subject>Physiology</subject><subject>Public health</subject><subject>Pupation</subject><subject>Pyrethroids</subject><subject>Reduction</subject><subject>Reproductive fitness</subject><subject>Sex</subject><subject>Sex ratio</subject><subject>Studies</subject><subject>Sublethal effects</subject><subject>Survival analysis</subject><subject>Toxicity tests</subject><subject>Trends</subject><subject>Vector-borne 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of Anopheles stephensi (Diptera: Culicidae), a malaria mosquito</title><author>Hariprasad, T.P.N. ; Shetty, N.J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c327t-e34275883ab1bc2b9e4506298a974bf94e468202bfa7313586563843cf6239193</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Adults</topic><topic>Agrochemicals</topic><topic>Alcohol</topic><topic>Animal husbandry</topic><topic>Anopheles gambiae</topic><topic>Anopheles stephensi</topic><topic>Aquatic insects</topic><topic>Bioassays</topic><topic>Culicidae</topic><topic>Diptera</topic><topic>Disease transmission</topic><topic>Eclosion</topic><topic>Embryos</topic><topic>Entomology</topic><topic>Exposure</topic><topic>Fecundity</topic><topic>Fitness</topic><topic>Genetics</topic><topic>Gonads</topic><topic>Hatchability</topic><topic>History</topic><topic>Human diseases</topic><topic>Insect 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Entomol</addtitle><date>2017-04</date><risdate>2017</risdate><volume>149</volume><issue>2</issue><spage>251</spage><epage>264</epage><pages>251-264</pages><issn>0008-347X</issn><eissn>1918-3240</eissn><abstract>Anopheles stephensi Liston (Diptera: Culicidae), an urban malaria vector in India, is controlled by insecticides. Sublethal concentrations can be effective in reducing mosquito populations and disease transmission by reducing its reproductive fitness. In this study, sublethal effects of alphamethrin, a synthetic pyrethroid, were assessed on selected fitness parameters. Late third instars of the Goraguntepalya strain, Bangalore, were exposed to three sublethal doses, LC10 – 0.00006, LC30 – 0.0004, and LC50 – 0.0014 mg/L and their effects on fecundity, egg hatchability, sex ratio, and longevity in parental, F1 and F2 generations. The morphology of gonads, pattern of pupation, and adult emergence were also assessed. We found a significant reduction in fecundity and hatchability among the sublethal concentrations as well as across generations. Survival analysis showed significant reduction in lifespan of exposed groups. Delay in pupation, eclosion, and no distortion in sex ratio was observed. The results suggest that sublethal concentrations of alphamethrin may have negative effects on exposed individuals and subsequent generations.</abstract><cop>New York, USA</cop><pub>Cambridge University Press</pub><doi>10.4039/tce.2016.57</doi><tpages>14</tpages></addata></record> |
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| ispartof | Canadian entomologist, 2017-04, Vol.149 (2), p.251-264 |
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| source | Cambridge University Press Journals Complete |
| subjects | Adults Agrochemicals Alcohol Animal husbandry Anopheles gambiae Anopheles stephensi Aquatic insects Bioassays Culicidae Diptera Disease transmission Eclosion Embryos Entomology Exposure Fecundity Fitness Genetics Gonads Hatchability History Human diseases Insect Management Insecticides Instars Life history Life span Malaria Mortality Mortality causes Mosquitoes Ova Parasites Parasitology Physiology Public health Pupation Pyrethroids Reduction Reproductive fitness Sex Sex ratio Studies Sublethal effects Survival analysis Toxicity tests Trends Vector-borne diseases |
| title | Sublethal and transgenerational effects of alphamethrin on life history traits of Anopheles stephensi (Diptera: Culicidae), a malaria mosquito |
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