Effects of temperature and larval diet on development rates and survival of the dengue vector Aedes aegypti in north Queensland, Australia.
Med Vet Entomol
; 14(1): 31-7, 2000 Mar.
Article
en En
| MEDLINE
| ID: mdl-10759309
ABSTRACT
Immature development times, survival rates and adult size (wing-lengths) of the mosquito Aedes aegypti (L.) (Diptera Culicidae) were studied in the laboratory at temperatures of 10-40 degrees C. The duration of development from egg eclosion (hatching of the first instar) to adult was inversely related to temperature, ranging from 7.2 +/- 0.2 days at 35 degrees C to 39.7 +/- 2.3 days at 15 degrees C. The minimum temperature threshold for development (t) was determined as 8.3 +/- 3.6 degrees C and the thermal constant (K) was 181.2 +/- 36.1 day-degrees above the threshold. Maximum survival rates of 88-93% were obtained between 20 and 30 degrees C. Wing-length was inversely related to temperature. The sex ratio (femalemale) was 11 at all temperatures tested (15, 20, 25 and 35 degrees C) except 30 degrees C (43). Under field conditions at Townsville and Charters Towers, north Queensland, the duration of immature development varied according to the container position (i.e. shaded or exposed) and the availability of food resources, as well as inversely with temperature. These data indicate that containers with an abundance of organic matter (e.g. those used for striking plant cuttings) or those amongst foliage or under trees (e.g. discarded plastic tubs and tyres) tended to produce the largest adult Ae. aegypti, which had faster development and better immature survival. As such progeny have been linked to a greater risk of dengue transmission, it would seem important to focus on control of such containers.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Aedes
/
Dengue
/
Insectos Vectores
Límite:
Animals
/
Female
/
Humans
/
Male
País/Región como asunto:
Oceania
Idioma:
En
Revista:
Med Vet Entomol
Asunto de la revista:
BIOLOGIA
/
MEDICINA VETERINARIA
Año:
2000
Tipo del documento:
Article
País de afiliación:
Australia