Volume 25, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Prior laboratory studies and field observations suggested that it might be possible to reduce the size of the population of, or eliminate, by the introduction of . The former mosquito is the principal vector of nonperiodic filariasis caused by and the latter is a closely related species refractory to the development of human filariae. The practicability of such competitive displacement was studied by a field trial on a remote coral atoll where there was an established population of . Three strains of were liberated at separate localities on the atoll and their fate was followed for 4 years. One strain disappeared within 12 months after release and the other two disappeared within 48 months. It was not clear whether failed to become established because the strains were unsuitable, the general environment was inappropriate, or was present in such numbers that rarely succeeded in mating with its own species.


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