Cold season mortality and hatching behavior of Aedes aegypti L. (Diptera: Culicidae) eggs in Buenos Aires City, Argentina

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In temperate regions, populations of Aedes aegypti survive the cold season in the egg stage. In the present work, we studied the cold-season mortality of Ae. aegypti eggs and their subsequent hatching pattern in Buenos Aires city. Eggs were exposed during the winter season (three months) in three ne...

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Detalles Bibliográficos
Autores principales: Fischer, Sylvia, Alem, Iris Soledad, De Majo, María Sol, Campos, Raúl Ernesto, Schweigmann, Nicolás
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Naturales
Egg survival
Hatching
Population dynamics
Temperate climate
Winter diapauses
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83924
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83924
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Egg survival
Hatching
Population dynamics
Temperate climate
Winter diapauses
spellingShingle Ciencias Naturales
Egg survival
Hatching
Population dynamics
Temperate climate
Winter diapauses
Fischer, Sylvia
Alem, Iris Soledad
De Majo, María Sol
Campos, Raúl Ernesto
Schweigmann, Nicolás
Cold season mortality and hatching behavior of Aedes aegypti L. (Diptera: Culicidae) eggs in Buenos Aires City, Argentina
topic_facet Ciencias Naturales
Egg survival
Hatching
Population dynamics
Temperate climate
Winter diapauses
description In temperate regions, populations of Aedes aegypti survive the cold season in the egg stage. In the present work, we studied the cold-season mortality of Ae. aegypti eggs and their subsequent hatching pattern in Buenos Aires city. Eggs were exposed during the winter season (three months) in three neighborhoods located along a gradient of distance toward the Río de la Plata River, coincident with a gradient of activity of Ae. aegypti. Results showed mortalities lower (30.6%) than those from tropical regions during the dry season. Significant differences were detected among the egg mortalities of each site with a maximum value at the site nearest the Río de la Plata River (50%), and a minimum value at the most continental site (9%). Post-experimental hatching response of eggs differed between sites, with the highest proportion of hatched eggs during the first immersion in the site nearest to the river and the lowest proportion in the most continental site. The hatching proportion also differed between age classes, with older (early-laid) eggs hatching later than new (late-laid) ones. Our results provide the first information of Ae. aegypti egg mortality in temperate South America and support the hypothesis that differences in egg mortality are associated with abundance patterns of Ae. aegypti in Buenos Aires city.
format Articulo
Articulo
author Fischer, Sylvia
Alem, Iris Soledad
De Majo, María Sol
Campos, Raúl Ernesto
Schweigmann, Nicolás
author_facet Fischer, Sylvia
Alem, Iris Soledad
De Majo, María Sol
Campos, Raúl Ernesto
Schweigmann, Nicolás
author_sort Fischer, Sylvia
title Cold season mortality and hatching behavior of Aedes aegypti L. (Diptera: Culicidae) eggs in Buenos Aires City, Argentina
title_short Cold season mortality and hatching behavior of Aedes aegypti L. (Diptera: Culicidae) eggs in Buenos Aires City, Argentina
title_full Cold season mortality and hatching behavior of Aedes aegypti L. (Diptera: Culicidae) eggs in Buenos Aires City, Argentina
title_fullStr Cold season mortality and hatching behavior of Aedes aegypti L. (Diptera: Culicidae) eggs in Buenos Aires City, Argentina
title_full_unstemmed Cold season mortality and hatching behavior of Aedes aegypti L. (Diptera: Culicidae) eggs in Buenos Aires City, Argentina
title_sort cold season mortality and hatching behavior of aedes aegypti l. (diptera: culicidae) eggs in buenos aires city, argentina
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/83924
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