THE AGE COMPOSITION OF ANOPHELES FLUVIATILIS AND ITS SEASONAL VARIATION IN HORMOZGAN PROVINCE

Abstract

This investigation was carried out in Koveh village Siahow district, Hormozgan province, from spring 1997 to the end of fall 1998. Anophele fluviatilis is highly exophilic in this region, so it was not possible to collect a good number of An. Floviatilis in human and animals. Out of 6594 female Anopheles, An. fluviatilis comprised 47.85 percent, the highest number of mosquitoes, and the other species were: An.dthali (31.6%), An.stephensi (13.94%), An.sergenti (6.31%), An. superpictus(0.1%), An. Culicifacies (0.1%), An. Turkhudi (0.1%) and An. Pulcherimos (0.01%). The number of An. Floviatilis collected on animal and human bait was 2895 and 260, respectively. Out of 3155 An. Fluvatilis collected on animal and human baits, 57 percent were dissected for age determination. Age composition of An. Flaviatilis varied in different seasons. The highest parous rate was in summer (71.4%) and the lowest in winter (37%). In spring and autumn it was 59.5 and 46.5 percent, respectively. Comparing the parous rate of adults using two different methods, detinova (tracheal system of ovary) and polovodova (Ovary dissection) showed no significant differences.