Cinétique démographique des populations pré-imaginales d’Aedes mariae (Diptera: Culicidae) des côtes occidentales Algériennes

Abstract

Aedes mariae is a thalassophilic complex of three sibling species whose preimaginal instars inhabit rock-pools of the Mediterranean shores. These Aedes mariae species Sergent & Sergent, 1903 co-occur around the Tyrrhenian basin and notably on the rocky coast of Western Algeria. During one year, a survey on the dynamics of populations showed that the biological cycle is obviously different from those observed in the Northern Mediterranean sea by the presence of active females in January and February and a reduced supply of eggs in their habits ; the Aedes mariae populations of west Algerian coasts a double strategy for development. The most important hatching recorded when conductivity ranges between 52,000 and 75,000 μm-1 resulting from the supply of sea water and a concentration of salts from evaporation. Conductivity in excess of 100,000 μm-1 restricts the egg hatching in favour of biological desiccation.