The use of annual killifish in the biocontrol of the aquatic stages of mosquitoes in temporary bodies of fresh water; a potential new tool in vector control

摘要: Mosquitoes that breed in temporary pools remote areas dry up seasonally are especially difficult to control through chemical or biological means. The annual killifish has been suggested as a means of eradicating the aquatic stages mosquitoes transient because they can maintain permanent populations such habitats by undergoing suspended animation diapause during embryonic survive periodic drought. However, very little is known about predatory activity and their usefulness mosquito control. killifish, Nothobranchius guentheri, native Tanzania, was used this investigation. Food preference tested under laboratory conditions feeding juvenile with 2nd instar larvae Culex quinquefasciatus presence alternative food sources, rotifers chironomid larvae. Semi-field tests were conducted introduction hibernating embryos fish artificial ponds an outdoor open environment allowed natural oviposition Cx. quinquefasciatus. studies show N. guentheri preferred prey on than either rotifers. When added simultaneously addition freshwater, hatched fed larval population resulting complete elimination immature stages. high density resulted total eradication due predation fish. Complete biocontrol achieved 3 per m2 pond surface area. provides yet another tool may be employed diseases carried vector control, particularly bodies freshwater. conveniently transported absence water form embryos. Once introduced juveniles ponds, effectively reduce its aggressive activity.