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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 103, No. 1, 2008, pp. 115-117
Bioline Code: oc08020
Full paper language: English
Document type: Short Communication
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 103, No. 1, 2008, pp. 115-117

 en Long-term storage and viability of Ochlerotatus albifasciatus check for this species in other resources eggs (Diptera: Culicidae)
Campos, Raúl E

Abstract

The viability of Ochlerotatus albifasciatus check for this species in other resources (Macquart) eggs stored at room temperature and at 5°C was studied over 31 months. After 12, 18 and 31 months of storage, eggs were acclimatized at 22°C for ten days, and then inundated twice every seven days. The effect of the storage period on the percentage of hatching was analyzed by one way ANOVA. Differences on the hatching response between the first and second flooding were analyzed by paired t-test. Differences on the hatching response between the two storage conditions were analyzed by Mann-Whitney rank test. Results showed that (1) Oc. albifasciatus eggs were able to survive and hatch over 31 months; (2) the percent hatching of eggs stored at 5°C was higher than that of eggs stored at room temperature; and (3) low temperatures and long periods without water favor installment hatching.

Keywords
Culicidae - floodwater mosquitoes - egg dormancy - diapause - egg survival - hatching

 
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