Cold Season Mortality under Natural Conditions and Subsequent Hatching Response of Aedes (Stegomyia) aegypti (Diptera: Culicidae) Eggs in a Subtropical City of Argentina

In temperate and subtropical regions, populations of Aedes (Stegomyia) aegypti (L.) survive unfavorable winter conditions in the egg stage. Knowing their survival rates can be of great interest for the health authorities in charge of control activities. In this study, we analyzed the mortality of Ae...

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Detalles Bibliográficos
Autor principal: Fischer, Sylvia Cristina
Publicado: 2015
Materias:
Argentina
Chaco
dengue vector
egg
survival
Aedes
animal
cold
growth, development and aging
longevity
oocyte
physiology
season
Animals
Cold Temperature
Longevity
Ovum
Seasons
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222585_v52_n5_p879_Gimenez
http://hdl.handle.net/20.500.12110/paper_00222585_v52_n5_p879_Gimenez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00222585_v52_n5_p879_Gimenez
record_format dspace
spelling paper:paper_00222585_v52_n5_p879_Gimenez2023-06-08T14:48:32Z Cold Season Mortality under Natural Conditions and Subsequent Hatching Response of Aedes (Stegomyia) aegypti (Diptera: Culicidae) Eggs in a Subtropical City of Argentina Fischer, Sylvia Cristina Argentina Chaco dengue vector egg survival Aedes animal Argentina cold growth, development and aging longevity oocyte physiology season Aedes Animals Argentina Cold Temperature Longevity Ovum Seasons In temperate and subtropical regions, populations of Aedes (Stegomyia) aegypti (L.) survive unfavorable winter conditions in the egg stage. Knowing their survival rates can be of great interest for the health authorities in charge of control activities. In this study, we analyzed the mortality of Ae. aegypti eggs exposed to the cold season as well as their hatching patterns under laboratory conditions in the city of Resistencia, Chaco, Argentina. The mortality rate was 48.6%. No statistically significant differences were observed in the mortality of eggs exposed at different sites. Hatching response differed significantly among the successive postexposure immersions, with the highest proportion of hatched eggs during the first immersion. These results show that the mortality rate of Ae. aegypti eggs exposed to the cold season in a subtropical city of Argentina was higher than those from temperate climate region. The additional mortality of eggs in our study might be related to fungal development (an unexpected event), which was not observed in research in temperate climate. The hatching pattern observed in this study ensures a rapid increase of the population at the beginning of the favorable breeding season, but it also maintains a batch with delayed hatching eggs, posing a risk for the community. © The Authors 2015. Fil:Fischer, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222585_v52_n5_p879_Gimenez http://hdl.handle.net/20.500.12110/paper_00222585_v52_n5_p879_Gimenez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Chaco
dengue vector
egg
survival
Aedes
animal
Argentina
cold
growth, development and aging
longevity
oocyte
physiology
season
Aedes
Animals
Argentina
Cold Temperature
Longevity
Ovum
Seasons
spellingShingle Argentina
Chaco
dengue vector
egg
survival
Aedes
animal
Argentina
cold
growth, development and aging
longevity
oocyte
physiology
season
Aedes
Animals
Argentina
Cold Temperature
Longevity
Ovum
Seasons
Fischer, Sylvia Cristina
Cold Season Mortality under Natural Conditions and Subsequent Hatching Response of Aedes (Stegomyia) aegypti (Diptera: Culicidae) Eggs in a Subtropical City of Argentina
topic_facet Argentina
Chaco
dengue vector
egg
survival
Aedes
animal
Argentina
cold
growth, development and aging
longevity
oocyte
physiology
season
Aedes
Animals
Argentina
Cold Temperature
Longevity
Ovum
Seasons
description In temperate and subtropical regions, populations of Aedes (Stegomyia) aegypti (L.) survive unfavorable winter conditions in the egg stage. Knowing their survival rates can be of great interest for the health authorities in charge of control activities. In this study, we analyzed the mortality of Ae. aegypti eggs exposed to the cold season as well as their hatching patterns under laboratory conditions in the city of Resistencia, Chaco, Argentina. The mortality rate was 48.6%. No statistically significant differences were observed in the mortality of eggs exposed at different sites. Hatching response differed significantly among the successive postexposure immersions, with the highest proportion of hatched eggs during the first immersion. These results show that the mortality rate of Ae. aegypti eggs exposed to the cold season in a subtropical city of Argentina was higher than those from temperate climate region. The additional mortality of eggs in our study might be related to fungal development (an unexpected event), which was not observed in research in temperate climate. The hatching pattern observed in this study ensures a rapid increase of the population at the beginning of the favorable breeding season, but it also maintains a batch with delayed hatching eggs, posing a risk for the community. © The Authors 2015.
author Fischer, Sylvia Cristina
author_facet Fischer, Sylvia Cristina
author_sort Fischer, Sylvia Cristina
title Cold Season Mortality under Natural Conditions and Subsequent Hatching Response of Aedes (Stegomyia) aegypti (Diptera: Culicidae) Eggs in a Subtropical City of Argentina
title_short Cold Season Mortality under Natural Conditions and Subsequent Hatching Response of Aedes (Stegomyia) aegypti (Diptera: Culicidae) Eggs in a Subtropical City of Argentina
title_full Cold Season Mortality under Natural Conditions and Subsequent Hatching Response of Aedes (Stegomyia) aegypti (Diptera: Culicidae) Eggs in a Subtropical City of Argentina
title_fullStr Cold Season Mortality under Natural Conditions and Subsequent Hatching Response of Aedes (Stegomyia) aegypti (Diptera: Culicidae) Eggs in a Subtropical City of Argentina
title_full_unstemmed Cold Season Mortality under Natural Conditions and Subsequent Hatching Response of Aedes (Stegomyia) aegypti (Diptera: Culicidae) Eggs in a Subtropical City of Argentina
title_sort cold season mortality under natural conditions and subsequent hatching response of aedes (stegomyia) aegypti (diptera: culicidae) eggs in a subtropical city of argentina
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222585_v52_n5_p879_Gimenez
http://hdl.handle.net/20.500.12110/paper_00222585_v52_n5_p879_Gimenez
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