Hibernation of Anopheline Eggs in the Tropics

Stone, Wm. S.; Reynolds, F.H.

doi:10.1126/science.90.2338.371

Cited by 12 publications

(5 citation statements)

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“…Field observations, whereby soil from larval habitats that had dried up was investigated for the presence and viability of immature stages, support this hypothesis [8,11,13]. Similar observations were made with other malaria vectors, such as Anopheles albimanus [14] and Anopheles balabacensis [15]. …”

Section: Introductionmentioning

confidence: 66%

Egg hatching, larval movement and larval survival of the malaria vector Anopheles gambiae in desiccating habitats

Koenraadt

Paaijmans

Githeko

et al. 2003

Malar J

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Section: Introductionmentioning

confidence: 66%

Egg hatching, larval movement and larval survival of the malaria vector Anopheles gambiae in desiccating habitats

Koenraadt

Paaijmans

Githeko

et al. 2003

Malar J

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“…gambiae eggs. Short-term survival of tropical anopheline eggs on soil has been suggested as a mechanism for overcoming periods of drought (Stone and Reynolds 1939). The extent to which An.…”

Section: Discussionmentioning

confidence: 99%

Constant Temperature and Time Period Effects on Anopheles Gambiae Egg Hatching

Impoinvil¹,

Cardenas

Gihture³

et al. 2007

Journal of the American Mosquito Control Association

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Anopheles gambiae Giles sensu stricto (Diptera: Culicidae) egg development and its relation to environmental parameters is an understudied aspect of vector biology. Although several studies have illustrated the dramatic effects of temperature on egg development, egg hatching dynamics remain unclear. The objective of this study was to expose An. gambiae eggs to various temperatures for different lengths of time and determine the impact on egg development and hatching count. Batches of mosquito eggs (n = 30 eggs/replicate) were incubated under moist conditions at temperatures of 12, 22, 27, 33, and 42 degrees C for intervals of 1, 3, 7, and 10 days. After that, they were flooded with distilled water at 27 degrees C, and hatching counts were observed for up to 7 days. Mosquito eggs held at 22 and 27 degrees C had the highest overall mean hatching count. During early incubation periods, eggs held at 33 degrees C had hatching counts comparable to 22 and 27 degrees C, but counts decreased drastically during later incubation periods. Temperatures of 12 and 42 degrees C reduced mosquito egg viability, because few eggs hatched in these temperature regimes. Other experiments revealed that during early embryonic development, temperature had a major effect on the developing embryo, while later in embryonic development it had no dramatic effect. Microscopic observation of the An. gambiae embryo showed that extreme low and high temperatures affected the normal development of the embryo. A regression model was developed to describe the effect of incubation temperature and incubation period on egg hatching counts, which demonstrated that the optimum temperature for egg hatching ranges from 24 to 30 degrees C, irrespective of incubation period. The interaction between temperature and time period may have implications for dry-season survival and climate-based models of malaria risk.

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“…gambiae por cerca de 10 dias (Deane & Cau¬ sey, 1943), An. punctimaculata por quatro semanas (Stone & Reynolds, 1939) e Ae.flu¬ viatilis por 30 dias (Consoli & Williams, 1978). A diapausa na fase de ovo, caracterizada por uma suspensão temporária da eclosão após o término do desenvolvimento embrionário, ocorre naturalmente nos mosquitos que depositam seus ovos fora da água.…”

Section: Eclosão E Diapausaunclassified