https://doi.org/10.4081/jear.2017.6594
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To what extent does salt (NaCl) affect Anopheles gambiae sensu lato mosquito larvae survival?

Authors

N. Lukwa
nziraa33@yahoo.co.uk
National Institute of Health Research, Harare, Zimbabwe.
T. Mduluza
Department of Biochemistry, University of Zimbabwe, Harare, Zimbabwe.
C. Nyoni
Department of Social Work, Bindura University of Science of Education, Bindura, Zimbabwe.
M. Zimba
Department of Biological Sciences, University of Zimbabwe, Harare, Zimbabwe.
The effect of salt (NaCl) on Anopheles gambiae sensu lato (s.l.) mosquito larval breeding was ascertained under laboratory conditions. No larval mortality occurred when the Cl– concentrations were between 0.017 ppt (0.03 ppt salinity) and 7.371 ppt (13.25 ppt salinity). However, 9%, 24%, 73.5%, 91.5% and 99.5% larval mortality occurred at 10.828 ppt (19.49 ppt salinity), 16.069 ppt (28.95 ppt salinity), 18.739 ppt (33.77 ppt salinity), 32.587 ppt (58.82 ppt salinity) and 47.326 ppt (85.37 ppt salinity) NaCl concentrations respectively. The lower NaCl concentrations resulting in LC50, (lethal concentration for 50% larval mortality), LC90 (lethal concentration for 90% larval mortality), LC95 (lethal concentration for 95% larval mortality), and LC99 (lethal concentration for 99% larval mortality) were 23.12 ppt (41.19 ppt salinity), 24.91 ppt (44.42 ppt salinity), 27.76 ppt (49.56 ppt salinity) and 33.87 ppt (60.568 ppt salinity) respectively. The upper NaCl concentration resulting in LC50, LC90, LC95 and LC99 were 32.89 ppt (58.83 ppt salinity), 37.21 ppt (66.63 ppt salinity), 44.79 ppt (80.32 ppt salinity) and 63.76 ppt (114.55 ppt salinity) respectively. In conclusion, the level of water salinity may indicate the presence or absence of An. gambiae s.l. mosquito larvae and this information can be used for disease control purposes.

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Supporting Agencies

National Institute of Health Research, University of Zimbabwe

How to Cite

Lukwa, N., Mduluza, T., Nyoni, C., & Zimba, M. (2017). To what extent does salt (NaCl) affect Anopheles gambiae sensu lato mosquito larvae survival?. Journal of Entomological and Acarological Research, 49(2). https://doi.org/10.4081/jear.2017.6594

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