Progressive decrease in Aedes aegypti distribution in Reunion island since the 1900s
In Reunion Island, the distribution of the domestic form of #Aedes aegypti# (L.) has been restricted to natural habitats, in ravines located on the driest west coast over the past 50 yr. It is mainly found in rock holes, where it principally co-occurs with #Aedes albopictus# (Skuse), the most common #Aedes# species and the major vector of arboviruses there. To document and understand the changes in #Ae. Aegypti# distribution on the island since the beginning of the 20th century, data on its distribution from 1985 to 1986 and from 2007 to 2008 were analyzed and compared with previously published reports. The results show that the number of breeding sites with #Ae. Aegypti# and the relative abundance of this species have progressively decreased and that this species is not found any more in artificial containers. The causes of the decrease of #Ae. Aegypti# populations are discussed. It is suggested that ecological factors such as a competitive interactions between #Ae. Aegypti# and #Ae. Albopictus# might have triggered the decrease of #Ae. Aegypti# observed during the fifties and that vector control campaigns during these years might have accelerated this process.
| Main Authors: | , , , |
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| Format: | article biblioteca |
| Language: | eng |
| Subjects: | L60 - Taxonomie et géographie animales, L72 - Organismes nuisibles des animaux, Aedes aegypti, santé publique, http://aims.fao.org/aos/agrovoc/c_30482, http://aims.fao.org/aos/agrovoc/c_6349, http://aims.fao.org/aos/agrovoc/c_6543, http://aims.fao.org/aos/agrovoc/c_3081, |
| Online Access: | http://agritrop.cirad.fr/557316/ http://agritrop.cirad.fr/557316/1/document_557316.pdf |
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