Abstract
A large pond, up to 2000 m2 area, adjacent to the sea at Jimbo, near Vanga, on the south coast of Kenya was studied for salinity and the presence of mosquito larvae 1980–1981. Rainfall peaked in November-December 1980 and again in March-May 1981, while salinity of the pond-water fluctuated inversely from dryness in February, more than 100% seawater equivalent in months before main rains, to below 13% seawater after the onset of rain in March.
Five types of mosquito larvae occurred in the pond: Aedes albocephalus mostly at 21–30% salinity (range 13–30%); Culex sitiens mostly at 31–40% salinity (range 13–54%); Culex tritaeniorhynchus and Culex thalassius mostly at 41–50% salinity (range 13–50%) and the Anopheles gambiae complex from 13 to 54% salinity, at least those at higher salinities being Anopheles merus. No larvae were present when salinity surpassed 54% through evaporation, or fell below 13% after rain. The most reliable way to limit or control these pest and vector mosquitoes at Jimbo would be to drain the pond into the sea after rainfall, so that mosquito populations could not increase by breeding sequentially, while salination proceeds.
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References
Bates N. (1939) The use of salt solution for the demonstration of physiological differences between the larvae of certain European Anopheles mosquitoes. Am. J. trop. Med. 19, 357–384.
Belkin J. N. (1962) The Mosquitoes of the South Pacific (Diptera: Culicidae), Vol. I. University of California Press, California.
Blakeslee T. E. (1952) Chloride ion tolerance of four mosquitoes of Okinawa. Mosquito News 12, 191–194.
Bushrod F. M. (1979) Studies on filariasis transmission in Kwale, a Tanzania coastal village, and the results of mosquito control measures. Ann. trop. Med. Parasit. 75, 277–285.
Bushrod F. M. (1981) The Anopheles gambiae Giles complex and bancroftian filariasis transmission in a Tanzania coastal village. Ann. trop. Med. Parasit. 75, 93–100.
Coluzzi M. and Sabatini A. (1969) Cytogenetic observations on salt water species, Anopheles merus and Anopheles melas of the gambiae complex. Parassitologia 11, 177–187.
Gebert S. (1936) The breeding of Anopheles costalis in seawater, in Mauritius. Trans. R. Soc. trop. Med. Hyg. 30, 255–257.
Giglioli M. E. C. (1964) Tides, salinity and the breeding of Anopheles melas (Theobald, 1903) during the dry season in the Gambia. Riv. Malariol. 43, 245–263.
Goiny H., Someren E. C. C. van and Heisch R. B. (1957) The eggs of Aedes (Skusea) pembaensis Theobald discovered on crabs. E. Afr. med. J. 34, 1–2.
Halcrow J. G. (1955) Adult behaviour patterns of Anopheles gambiae in Mauritius. Nature 175, 396.
Halcrow J. G. (1956) Ecology of Anopheles gambiae Giles. Nature 177, 1103.
Halcrow J. G. (1957) A new sub-species of Anopheles gambiae Giles from Mauritius. E. Afr. med. J. 34, 133–135.
Hopkins G. H. E. (1952) Mosquitoes of the Ethiopian Region. 1. In Larval Bionomics of Mosquitoes and Taxonomy of Culicine Larvae, Vol. viii + 355 pp. British Museum (Natural History), London.
Ingram A. and Macfie J. E. S. (1917) The early stages of certain West African mosquitoes. Bull. ent. Res. 8, 134–154.
Iyengar M. O. T. (1944) Problems relating to malaria control in deltaic Bengal. J. Malaria Inst. India 5, 435–447.
Iyengar M. O. T. (1952) Filariasis in Maldive Islands. Bull. Wld Hlth Org. 7, 375–403.
Iyengar M. O. T. (1962) The bionomics of salt-water Anopheles gambiae in East Africa. Bull. Wld Hlth Org. 27, 223–229.
Jepson W. F., Moutia A. and Courtois C. (1947) The malaria problem in Mauritius: the bionomics of Mauritian Anopheles. Bull. ent. Res. 38, 177–208.
Kolstrup N., McMahon J. E., Magayuka S. A., Mosha F. W., Bushrod F. M. and Bryan J. H. (1981) Control measures against Bancroftian filariasis in coastal villages in Tanzania. Ann. trop. Med. Parasit. 75, 433–451.
Kuhlow F. (1962a) Studies on the bionomics and the morphology of the saltwater breeding Anopheles gambiae on the coast of Tanganyika. Riv. Malariol. 41, 187–197.
Kuhlow F. (1962b) Beobachtungen und Experimente uber den Anopheles gambiae -Komplex, Abrennung von An-opheles tangensis n. sp. Z. Tropenmed. Parasit. 13, 442–449.
Macfie J. W. S. (1914) A note on the action of common salt on the larvae of Stegomyia fasciatus. Bull. ent. Res. 4, 339–344.
Macfie J. W. S. (1921) The effects of solutions and seawater on Stegomyia fasciatus. Ann. trop. Med. Parasit. 15, 337–380.
Mackay R. (1938) Second (final) Report of the Malaria Unit, Dar -es -Salaam, for the Period November 1934 to December 1936. Dar-es-Salaam, Government Printer.
Maffi M. (1960) Focolaio larvale de A. gambiae e di A. Squamosus in raceolta d’acqua salata, a Busc (fascia costiera del basso Oltre Giuba). Primo reperto in Somalia. Riv. Malariol. 39, 131–133.
Mogi M. (1978) Population studies on mosquitoes in the rice field area of Nagasaki, Japan, especially on Culex tritaeniorhynchus. Trop. Med. 20, 173–263.
Mosha F. W. and Magayuka S. A. (1979) Potential vectors and non-vectors of bancroftian filariasis in East Africa. E. Afr. med. J. 56, 179–202.
Mosha F. W. and Mutero C. M. (1982) The influence of salinity on larval development and population dynamics of Anopheles merus Dönitz (Diptera: Culicidae). Bull. ent. Res. 72, 119–128.
Mosha F. A. and Petrarca V. (1983) Ecological studies on Anopheles gambiae complex sibling species in Kenya. Trans. R. Soc. trop. Med. Hyg. 77, 344–345.
Mosha F. W. and Subra R. (1982) Ecological studies on Anopheles gambiae complex sibling species in Kenya. 1. In Preliminary Observations on the Geographical Distributions and Chromosomal Polymorphic Inversions. Unpublished document WHO/VBC/82.
Mosha F. W. and Subra R. (1983) Survival Rate and Vectorial Capacities for Bancroftian Filariasis of Anopheles gambiae Sibling Species Along the Kenya Coast. Unpublished report to WHO.
Muirhead-Thomson R. C. (1951) Studies on saltwater and fresh-water Anopheles gambiae on the East African coast. Bull. ent. Res. 41, 487–502.
Muspratt J. (1955) Research on South African Culicini (Diptera: Culicidae) VI. A check-list of the species and their distribution, with notes on taxonomy, bionomics and identification. J. ent. Soc. sth. Afr. 18, 149–207.
Mutero C. M., Mosha F. W. and Subra R. (1984) Biting activity and resting behaviour of Anopheles merus Dönitz (Diptera:Culicidae) on the Kenya coast. Ann. trop. Med. Parasit. In press.
Oketch L. M. and White G. B. (1981) Reliability of Superoxide dismutase isoenzyme for distinguishing A. merus from other members of the Anopheles gambiae complex. Trans. Roy. Soc. trop. Med. Hyg. 75, 887.
Paterson H. E. (1964) “Saltwater Anopheles gambiae” on Mauritius. Bull. Wld Hlth Org. 31, 635–644.
Rao T. R. (1981) The Anopheles of India, Vol. XVI, p. 596. Indian Council for Medical Research, New Delhi.
Reisen W. K. and Siddiqui T. F. (1979) Horizontal and vertical estimates of immature survivorship for Culex tritaeniorhynchus in Pakistan. J. med. Ent. 16, 207–218.
Smith S. M. and Corbet P. S. (1975) Observations on the reproductive biology of Aedes (Ochlerotatus) fryeri (Theo.) (Diptera, Culicidae). Bull. ent. Res. 65, 285–293.
Someren E. C. C. van, Teesdale C. and Furlong M. (1955) The mosquitoes of the Kenya coast, records of occurrence, behaviour and habitat. Bull. ent. Res. 46, 463–493.
Someren E. C. C. van, Heisch R. B. and Furlong M. (1958) Observations on the behaviour of some mosquitoes of the Kenya coast. Bull. ent. Res. 49, 643–660.
Someren E. C. C. van and Furlong M. (1964) The bitinghabits of Aedes (Skusea) pembaensis Theo. and some other mosquitoes of Faza Island, East Africa. Bull. ent. Res. 55, 97–124.
White G. B. (1974) Anopheles gambiae complex and disease transmission in Africa. Trans. R. Soc. trop. Med. Hyg. 68, 278–301.
WHO (1975) Manual on Practical Entomology in Malaria Prepared by WHO Division of Malaria and Other Parasitic Diseases. Part II. Methods and Techniques. WHO offset publication no. 13, Geneva.
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Rogo, L.M.N., White, G.B. & Odhiambo, R.C. Salinity Relationships of Mosquitoes Breeding in a Brackish Pond on the Kenya Coast. Int J Trop Insect Sci 6, 91–95 (1985). https://doi.org/10.1017/S1742758400002745
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DOI: https://doi.org/10.1017/S1742758400002745