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Artículo

Differential inhibition of egg hatching in Aedes aegypti populations from localities with different winter conditions

Campos, Raul ErnestoIcon ; Zanotti, Gabriela AlejandraIcon ; Di Battista, Cristian MatiasIcon ; Gimenez, Javier OrlandoIcon ; Fischer, Sylvia CristinaIcon
Fecha de publicación: 06/2021
Editorial: Cambridge University Press
Revista: Bulletin of Entomological Research
ISSN: 0007-4853
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Zoología, Ornitología, Entomología, Etología

Resumen

In Argentina, the mosquito Aedes aegypti (L.) (Diptera: Culicidae) is distributed from subtropical to temperate climates. Here, we hypothesized that the expansion of Ae. aegypti into colder regions is favoured by high-phenotypic plasticity and an adaptive inhibition of egg hatching at low temperatures. Thus, we investigated the hatching response of eggs of three populations: One from a subtropical region (Resistencia) and two from temperate regions (Buenos Aires City and San Bernardo) of Argentina. Eggs collected in the field were raised in three experimental colonies. F1 eggs were acclimated for 7 days prior to immersion at 7.6 or 22°C (control eggs). Five immersion temperatures were tested: 7.6, 10.3, 11.8, 14.1 and 16°C (range of mean winter temperatures of the three localities). A second immersion at 22°C was performed 2 weeks later to assess the inhibition to hatch under favourable conditions. After the first immersion, we compared the proportions of hatched eggs and dead larvae among treatment levels, whereas after the second immersion we compared the hatching response among the three populations. The factors that most influenced the egg hatching response were the geographical origin of the populations and the immersion temperature, but not the acclimation temperature. The proportions of hatching and larval mortality at low temperatures were higher for Resistencia than for Buenos Aires and San Bernardo, whereas the hatching response at ambient temperature was lower for San Bernardo than for Buenos Aires and Resistencia. The results support the hypothesis that populations from colder regions show an adaptive inhibition of egg hatching.
Palabras clave: ACCLIMATION , AEDES AEGYPTI , ARGENTINA , HATCHING RESPONSE , LOW TEMPERATURE , MORTALITY
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/181436
DOI: https://doi.org/10.1017/S0007485320000681
URL: https://www.cambridge.org/core/journals/bulletin-of-entomological-research/artic
Colecciones
Articulos(IEGEBA)
Articulos de INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BS. AS
Articulos(ILPLA)
Articulos de INST.DE LIMNOLOGIA "DR. RAUL A. RINGUELET"
Citación
Campos, Raul Ernesto; Zanotti, Gabriela Alejandra; Di Battista, Cristian Matias; Gimenez, Javier Orlando; Fischer, Sylvia Cristina; Differential inhibition of egg hatching in Aedes aegypti populations from localities with different winter conditions; Cambridge University Press; Bulletin of Entomological Research; 111; 3; 6-2021; 323-330
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