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Abstract:

Aedes (Ochlerotatus) albifasciatus (Macquart) has the capacity to proliferate in different kinds of climates within its distribution range in South America. With the aim of studying local thermal adaptations of eggs, we exposed egg stocks from two climatically different localities: temperate humid pampa (Buenos Aires) and cold arid Patagonian (Sarmiento), to freezing conditions and then evaluated the effect on some features at this level. First, we thermally described the substrate where this species lays its eggs in the arid region. A typical thermal condition during winter was 10 h at -12° C. Second, we evaluated the effect of freezing on primary hatching (vs total hatching) and embryo survival. We also compared the proportion of embryonated eggs from both populations. The proportions of embryonated eggs were not different between localities, with averages of 78% and 83% in Sarmiento and Buenos Aires, respectively. Survival was equally successful after freezing in the two localities with an average range between 94-99%. Whether or not the eggs from Buenos Aires and Sarmiento were under freezing conditions, hatching was more than 98% after the first flooding. The results suggest that eggs of Ae. albifasciatus from Sarmiento and Buenos Aires have the same ability to survive at extreme temperatures (<0° C), showing a regional thermal adaptation rather than a local one. © 2013 The Society for Vector Ecology.

Registro:

Documento: Artículo
Título:Resistance to freezing temperatures in Aedes (Ochlerotatus) albifasciatus (Macquart) eggs (Diptera: Culicidae) from two different climatic regions of Argentina
Autor:Garzón, M.J.; Jensen, O.; Schweigmann, N.
Filiación:Grupo de Estudio de Mosquitos, Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Ciudad Autónoma de Buenos Aires, Argentina
CONICET, Departamento de Investigación en Salud, Secretaria de Salud, Chubut, Argentina
Departamento de Investigación en Salud, Secretaria de Salud, Chubut, Argentina
Palabras clave:Egg hatching; Embryonic survival; Mosquitoes; Thermal adaptation; Winter temperature; Aedes; animal; Argentina; article; egg hatchability; embryonic survival; freezing; mosquito; oocyte; physiology; temperature; temperature acclimatization; winter temperature; egg hatching; embryonic survival; Mosquitoes; thermal adaptation; winter temperature; Aedes; Animals; Argentina; Freezing; Ovum; Temperature
Año:2013
Volumen:38
Número:2
Página de inicio:339
Página de fin:344
DOI: http://dx.doi.org/10.1111/j.1948-7134.2013.12049.x
Título revista:Journal of Vector Ecology
Título revista abreviado:J. Vector Ecol.
ISSN:10811710
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10811710_v38_n2_p339_Garzon

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Citas:

---------- APA ----------
Garzón, M.J., Jensen, O. & Schweigmann, N. (2013) . Resistance to freezing temperatures in Aedes (Ochlerotatus) albifasciatus (Macquart) eggs (Diptera: Culicidae) from two different climatic regions of Argentina. Journal of Vector Ecology, 38(2), 339-344.
http://dx.doi.org/10.1111/j.1948-7134.2013.12049.x
---------- CHICAGO ----------
Garzón, M.J., Jensen, O., Schweigmann, N. "Resistance to freezing temperatures in Aedes (Ochlerotatus) albifasciatus (Macquart) eggs (Diptera: Culicidae) from two different climatic regions of Argentina" . Journal of Vector Ecology 38, no. 2 (2013) : 339-344.
http://dx.doi.org/10.1111/j.1948-7134.2013.12049.x
---------- MLA ----------
Garzón, M.J., Jensen, O., Schweigmann, N. "Resistance to freezing temperatures in Aedes (Ochlerotatus) albifasciatus (Macquart) eggs (Diptera: Culicidae) from two different climatic regions of Argentina" . Journal of Vector Ecology, vol. 38, no. 2, 2013, pp. 339-344.
http://dx.doi.org/10.1111/j.1948-7134.2013.12049.x
---------- VANCOUVER ----------
Garzón, M.J., Jensen, O., Schweigmann, N. Resistance to freezing temperatures in Aedes (Ochlerotatus) albifasciatus (Macquart) eggs (Diptera: Culicidae) from two different climatic regions of Argentina. J. Vector Ecol. 2013;38(2):339-344.
http://dx.doi.org/10.1111/j.1948-7134.2013.12049.x