Horizon 1 1 17 ACLN : Articles dans des revues avec comité de lecture non répertoriées par l'AERES Journal of Medical Entomology 948-955 PALUDISME MOUSTIQUE LARVE ECOLOGIE DYNAMIQUE DE POPULATION VECTEUR GITE LARVAIRE QUALITE DE L'EAU SENEGAL DAKAR 1998 fdi:010016785 ENG Journal of Medical Entomology 0022-2585 6 https://www.documentation.ird.fr/hor/fdi:010016785 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/b_fdi_53-54/010016785.pdf 35 Horizon (IRD) 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) 052ANOPAL02