INVESTIGADORES
FISCHER Sylvia Cristina
artículos
Título:
Effects of Flooding and Temperature on Aedes albifasciatus Development Time and Larval Density in Two Rain Pools at Buenos Aires University City
Autor/es:
MARIA SOLEDAD FONTANARROSA; MARÍA CRISTINA MARINONE; SYLVIA FISCHER; PABLO WENCESLAO ORELLANO; NICOLÁS SCHWEIGMANN
Revista:
MEMóRIAS DO INSTITUTO OSWALDO CRUZ.
Editorial:
Instituto Oswaldo Cruz
Referencias:
Lugar: Rio de Janeiro; Año: 2000 vol. 95 p. 787 - 793
ISSN:
0074-0276
Resumen:
Aedes albifasciatus is a floodwater mosquito that breeds in temporary waters. This semi-domestic
species, widely distributed in Argentina, is a competent vector of the western equine encephalitis. The
present study was carried out in two rain pools of the city of Buenos Aires, from April 1998 through
March 1999. Samples were taken twice a week during the cold season and daily during the warmer
months, starting from October. Immature mosquitoes were collected with a dipper, being the number of
dippers proportional to the flooded area. The estimated rainfall thresholds to initiate cohorts of Ae.
albifasciatus were: 16-17 mm in the fall-winter period, 25 mm in the spring, and 30 mm in the summer.
The development time of the different cohorts and the mean air temperature of their respective periods
were estimated in all seasons, ranging from six days (at 24ºC) to 32 days (at 13ºC). The equation that
best expresses the relationship between development time and mean air temperature is dt =
166,27.e-0,1435.T (R2=0,92). Significantly shorter development times were recorded for larvae of the
first three stages as compared to the fourth larval stage and pupae.