Robert Vincent, Awono-Ambene H.P., Thioulouse J. (1998). Ecology of larval mosquitoes, with special reference to Anopheles arabiensis (Diptera : Culcidae) in market-garden wells in urban Dakar, Senegal. Journal of Medical Entomology, 35 (6), p. 948-955. ISSN 0022-2585.
Titre du document
Ecology of larval mosquitoes, with special reference to Anopheles arabiensis (Diptera : Culcidae) in market-garden wells in urban Dakar, Senegal
Année de publication
1998
Auteurs
Robert Vincent, Awono-Ambene H.P., Thioulouse J.
Source
Journal of Medical Entomology, 1998,
35 (6), p. 948-955 ISSN 0022-2585
The urban area of Dakar, Senegal, contains more than 5,000 market-garden wells that provide permanent sites for mosquito larvae, in particular Anopheles arabiensis Patton, the major vector of malaria. A study of the bioecology of mosquito larvae was conducted over 1 yr with a monthly visit to 48 of these wells. Overall, 9,589 larvae were collected of which 80.1% were Culcinae and 11.9% Anophelinae. Larvae from stages 2 and 4 (n = 853) were identified to 10 species. An. arabiensis represented 86% of the anophelines collected and An. ziemanni Grunberg 14%. The most common Culcinae species included Aedeomyia africana Neveu-Lemaire, Culex quinquefasciatus Say, and Mimomyia splendens Theobald. Maximum anopheline abundance was observed at the end of the dry season in June, whereas maximum Culiniae abundance was observed at the end of the rainy season in September. Most wells (67%) did not harbor any An. arabiensis larvae and in the remaining 33% the larval abundance was low, averaging 0.54 larvae in stages 3-4 per tray sample. To identify factors that determine the abundance of larvae in these wells, a co-inertia (multivariate) analysis was carried out to account for physicochemical variables (depth, turbidity, temperature, pH, conductivity, Na(+), HCO3(-), CO3(--), and NO3(-) concentrations) and biological variables (abundance of mosquito species, predators (e.g. fish, Dystiscidae, Notonectidae, odonates), molluscs (Bulinus and Biomphalaria), and surface plants (water lettuce, Lemma and filamentous algae). The co-inertia analysis indicated that the abundance of An. arabiensis was associated with Cs. quinquefasciatus and Cx. decens for the physiochemical data but was not associated with other mosquito species for floro-faunistic data... (D'après résumé d'auteur)
Plan de classement
Répartition et bioécologie des anophèles [052ANOPAL02]
Descripteurs
PALUDISME ; MOUSTIQUE ; LARVE ; ECOLOGIE ; DYNAMIQUE DE POPULATION ; VECTEUR ; GITE LARVAIRE ; QUALITE DE L'EAU
Description Géographique
SENEGAL ; DAKAR
Localisation
Fonds IRD [F B010016785] ;
Dakar
Identifiant IRD
fdi:010016785
