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

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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Autores principales: Fischer, S., Alem, I.S., De Majo, M.S., Campos, R.E., Schweigmann, N.
Formato: JOUR
Materias:
Egg survival
Hatching
Population dynamics
Temperate climate
Winter diapauses
Aedes
animal
Argentina
article
cold
oocyte
physiology
population dynamics
season
Animals
Cold Temperature
Ovum
Population Dynamics
Seasons
Aedes aegypti
Culicidae
Diptera
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10811710_v36_n1_p94_Fischer
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_10811710_v36_n1_p94_Fischer
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spelling todo:paper_10811710_v36_n1_p94_Fischer2023-10-03T16:03:48Z Cold season mortality and hatching behavior of Aedes aegypti L. (Diptera: Culicidae) eggs in Buenos Aires City, Argentina Fischer, S. Alem, I.S. De Majo, M.S. Campos, R.E. Schweigmann, N. Egg survival Hatching Population dynamics Temperate climate Winter diapauses Aedes animal Argentina article cold oocyte physiology population dynamics season Aedes Animals Argentina Cold Temperature Ovum Population Dynamics Seasons Aedes aegypti Culicidae Diptera 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. © 2011 The Society for Vector Ecology. Fil:Fischer, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Alem, I.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:De Majo, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Schweigmann, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10811710_v36_n1_p94_Fischer
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Egg survival
Hatching
Population dynamics
Temperate climate
Winter diapauses
Aedes
animal
Argentina
article
cold
oocyte
physiology
population dynamics
season
Aedes
Animals
Argentina
Cold Temperature
Ovum
Population Dynamics
Seasons
Aedes aegypti
Culicidae
Diptera
spellingShingle Egg survival
Hatching
Population dynamics
Temperate climate
Winter diapauses
Aedes
animal
Argentina
article
cold
oocyte
physiology
population dynamics
season
Aedes
Animals
Argentina
Cold Temperature
Ovum
Population Dynamics
Seasons
Aedes aegypti
Culicidae
Diptera
Fischer, S.
Alem, I.S.
De Majo, M.S.
Campos, R.E.
Schweigmann, N.
Cold season mortality and hatching behavior of Aedes aegypti L. (Diptera: Culicidae) eggs in Buenos Aires City, Argentina
topic_facet Egg survival
Hatching
Population dynamics
Temperate climate
Winter diapauses
Aedes
animal
Argentina
article
cold
oocyte
physiology
population dynamics
season
Aedes
Animals
Argentina
Cold Temperature
Ovum
Population Dynamics
Seasons
Aedes aegypti
Culicidae
Diptera
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. © 2011 The Society for Vector Ecology.
format JOUR
author Fischer, S.
Alem, I.S.
De Majo, M.S.
Campos, R.E.
Schweigmann, N.
author_facet Fischer, S.
Alem, I.S.
De Majo, M.S.
Campos, R.E.
Schweigmann, N.
author_sort Fischer, S.
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
url http://hdl.handle.net/20.500.12110/paper_10811710_v36_n1_p94_Fischer
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