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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/8294

Title: Laboratory estimation of the effects of increasing temperatures on the duration of gonotrophic cycle of Anopheles albimanus (Diptera: Culicidae)
Authors: Rúa, Guillermo L.
Quiñones, Martha L.
Vélez, Iván D.
Zuluaga, Juan S.
Rojas, William
Poveda, Germán
Ruiz, Daniel
Keywords: gonotrophic cycle - Anopheles albimanus - temperature - El Niño - climate - Colombia
Issue Date: 31-Dec-2005
Publisher: Fundação Oswaldo Cruz, Fiocruz
Citation: Memórias do Instituto Oswaldo Cruz (ISSN: 1678-8060) Vol 100 Num 5
Abstract: The increase of malaria transmission in the Pacific Coast of Colombia during the occurrence of El Niño warm event has been found not to be linked to increases in the density of the vector Anopheles albimanus , but to other temperature-sensitive variables such as longevity, duration of the gonotrophic cycle or the sporogonic period of Plasmodium. The present study estimated the effects of temperature on duration of the gonotrophic cycle and on maturation of the ovaries of An. albimanus. Blood fed adult mosquitoes were exposed to temperatures of 24, 27, and 30°C, held individually in oviposition cages and assessed at 12 h intervals. At 24, 27, and 30°C the mean development time of the oocytes was 91.2 h (95% C.I.: 86.5-96), 66.2 h (61.5-70.8), and 73.1 h (64-82.3), respectively. The mean duration of the gonotrophic cycle for these three temperatures was 88.4 h (81.88-94.9), 75 h (71.4-78.7), and 69.1 h (64.6-73.6) respectively. These findings indicate that both parameters in An. albimanus are reduced when temperatures rose from 24 to 30°C, in a nonlinear manner. According to these results the increase in malaria transmission during El Niño in Colombia could be associated with a shortening of the gonotrophic cycle in malaria vectors, which could enhance the frequency of man-vector contact, affecting the incidence of the disease.
URI: http://hdl.handle.net/1807/8294
Other Identifiers: http://www.bioline.org.br/abstract?id=oc05123
Rights: Copyright 2005 - Instituto Oswaldo Cruz - Fiocruz.
Appears in Collections:Bioline International Legacy Collection

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