Observations on the reproductive biology ofAedes (Ochlerotatus) fryeri(Theo.) (Diptera, Culicidae)

Abstract

Aedes (Ochlerotatus) fryeri (Theo.) was found developing in saline pools on the coastal margins of coral islands near Dar es Salaam, Tanzania. Females were autogenous in the first ovarian cycle and anautogenous in the second ovarian cycle. The existence of autogeny was confirmed by examination of females reared from field-collected pupae and of the age structure of the population of females landing and biting. All females receiving carbohydrate and most females receiving only water as adults exhibited autogeny; only parous females were caught attempting to take blood. Water-fed females (and to a lesser extent, carbohydratefed females) showed a high incidence of follicular regression in the first gonotrophic cycle. The possible adaptive significance of autogeny in A. fryeri is briefly discussed.

Salinity relationships of mosquitoes breeding in a brackish pond on the Kenya coast

“…(Cx. Smith and Corbet (1975) found it breeding in coral pools near Dar-es-salaam and van Someren and Furlong (1964) indicated that breeding sites of Ae. The last of these has been studied most at the East African coast by Mackay (1938), Muirhead-Thomson (1951), Mam (1960, Kuhlow (1962a, b), Bushrod (1979Bushrod ( , 1981, Kolstrup et al (1981), Mosha and Mutero (1982), Mosha and Petrarca (1983), Mosha and Subra (1983), Mutero et al (1984) and on offshore islands by Gebert (1936), Jepson et al (1947), Halcrow (1955Halcrow ( , 1956Halcrow ( , 1957, Iyengar (1962) and by Paterson (1964).…”