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Cruzamiento interespecífico entre Aedes aegypti y Aedes albopictus en el laboratorio Translated title: Interspecific mating between Aedes aegypti and Aedes albopictus in the laboratory

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      Abstract

      Introducción: existen algunos estudios realizados para verificar el posible apareamiento interespecífico, pero solo algunos trabajos han obtenido resultados positivos en este fenómeno. Objetivo: probar la posibilidad de obtener huevos viables del cruce entre Aedes aegypti y Aedes albopictus. Métodos: experimentos de apareamiento recíproco entre Aedes aegypti procedentes del insectario del Departamento de Control de Vectores del Instituto de Medicina Tropical "Pedro Kourí" y una población de Aedes albopictus (primera progenie de una procedente de la naturaleza). Los experimentos se concluyeron en el laboratorio. Se usaron jaulas de 20x20x20 cm y de 60x60x60 cm. Los resultados se obtuvieron a nivel de huevo entre las hembras de Aedes albopictus y los machos de Aedes aegypti, así como en los cruces de hembras de Aedes aegypti y machos de Aedes albopictus; pero solo la segunda variante fue la que dio huevos fértiles. Resultados: el cruzamiento entre hembras de Aedes aegypti y machos de Aedes albopictus produjo más huevos que entre hembras de Aedes albopictus y machos de Aedes aegypti; pero en esta última combinación no resultaron huevos viables. La inseminación ocurrió en el cruzamiento entre hembras de Aedes aegypti y machos de Aedes albopictus. Los huevos con los cruces de hembras de Aedes aegypti con machos de Aedes albopictus resultaron viables, y las larvas y pupas tuvieron un rápido desarrollo (7 días). Conclusiones: la posibilidad de que un nuevo mosquito como producto de ese cruzamiento existiera en la naturaleza, pudiera ser un nuevo aspecto a estudiar en relación con la transmisión de dengue por el fenómeno de la heterosis.

      Translated abstract

      Introduction: some research has been done to verify the possible interspecific mating between these species, but only a few studies have obtained positive results. Objective: verify the possibility of obtaining viable eggs by cross-mating Aedes aegypti and Aedes albopictus. Methods: reciprocal mating was performed between Aedes aegypti from the insectary at the Vector Control Department of "Pedro Kourí" Tropical Medicine Institute and a population of Aedes albopictus (first progeny from a wild population). The experiment was conducted in the laboratory. Cages of two sizes were used: 20x20x20 cm and 60x60x60 cm. Eggs were obtained from cross-mating between Aedes albopictus females and Aedes aegypti males, and also from cross-mating between Aedes aegypti females and Aedes albopictus males, but only in the latter variant were the eggs fertile. Results: cross-mating between Aedes aegypti females and Aedes albopictus males produced more eggs than cross-mating between Aedes albopictus females and Aedes aegypti males, but in the latter variant eggs were not viable. Insemination occurred in the cross-mating between Aedes aegypti females and Aedes albopictus males. Eggs obtained from the cross-mating of Aedes aegypti females and Aedes albopictus males were viable, and the larvae and pupae showed fast development (7 days). Conclusions: the possibility that a new mosquito resulting from this cross-mating exists in nature could be a novel research topic in the area of dengue transmission by heterosis.

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      Most cited references 9

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      Global distribution and continuing spread of Aedes albopictus.

      Aedes albopictus ranks second only to Ae. aegypti in importance to man as a vector of dengue and dengue haemorrhagic fever (DHF) which viruses place at risk a potential population of 2 billion people living in tropical and sub-tropical regions. Due to its predilection for breeding in a plethora of habitat within urban and suburban environs as well as peri-rural areas it is spreading rapidly where suitable breeding is available. It exhibits strain differences ranging from the cold-hardy to tropic loving, yet despite limited flight range, it has spread beyond the Orient to China, the Pacific, the Indian Ocean islands, the Americas, parts of continental Africa and into southern Europe. This has been done principally by means of transport of eggs in used tyres via rapid air and sea transport. Egg positive used tyres, when shipped, and later rehydrated by rainfall, produce adult mosquitoes within a few days rapidly infesting new areas. Although dengue and other vector-borne arboviral diseases have not been in Europe in epidemic form for many decades, travelers do not infrequently return from dengue endemic areas with dengue and other similar infections. Aedes albopictus is a potential vector of a number of arboviruses and can transmit them in a vertical or transvenereal manner in nature, thereby providing a means for their maintenance and transmission. Where Ae. albopictus newly occurs, the affected populace immediately are aware of a new daytime, nuisance biting mosquito and complaints addressed to local mosquito control authorities increase significantly. The biological characteristics of the mosquito make its spread within Europe highly probable. The paper offers several avenues to be pursued to reduce the global spread of Ae. albopictus, when examined within the context of Europe and the wider world community.
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        Reproductive isolation between Florida strains of Aedes aegypti and Aedes albopictus.

        The dynamics of heterospecific and conspecific mating between Florida strains of Aedes aegypti and Aedes albopictus was examined. In nonchoice experiments where conspecific males were not available, dissection of the spermathecae showed that heterospecific insemination was an infrequent event for both species combinations (10.6% for Ae. albopictus with Ae. aegypti males, 3.6% for the reciprocal cross). Few eggs were produced from heterospecific crosses and all were nonviable. Frequency of heterospecific mating was not increased when the hindtarsi of females were removed, eliminating a significant mechanism for fending off unwanted courtship. When held with males of both species, females mated with conspecifics and oviposited without regard to the presence of heterospecifics. In low density experiments, a single female of either species caged with an excess of heterospecific males, the conspecific male always located and inseminated the female. These results indicate that significant prezygotic and postzygotic reproductive isolation exists between Ae. aegypti and Ae. albopictus.
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          Vigilancia entomológica de Aedes (S) aegypti y otros culícidos en Ciudad de La Habana, Cuba 1991-1996

          Se realizó un análisis de los resultados de la vigilancia entomológica llevada a cabo dentro del Programa de Erradicación del mosquito Aedes aegypti en el municipio Boyeros, Ciudad de La Habana, durante 1991-1996. Se ofrecen datos de la fauna de mosquitos colectados en el municipio por los diferentes métodos de muestreo, encuestas larvales, cebo humano,colectados en reposo y el uso de las larvitrampas. Se destacan las especies Culex quinquefasciatus, Aedes mediovittatus y Aedes aegypti con los diferentes métodos. Se demostró que las fuentes de agua: depósitos artificiales, otros depósitos y tanques bajos fueron los recursos más explotados por los mosquitos para su cría en este municipio, las encuestas larvales resultaron ser las más sensibles para la detección de especies por ser este método el que aportó mayor riqueza de éstos. Se hace referencia a la búsqueda de un mecanismo que ayude a estimar poblaciones de adultos a partir de los índices larvales que proporcionan las encuestas y se destaca el método de captura en reposo como el más sensible para adultos, en particular para el vector del dengue en el sistema de vigilancia de esta especie.
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            Author and article information

            Affiliations
            [1 ] Instituto Medicina Tropical Pedro Kourí Cuba
            Contributors
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Journal
            mtr
            Revista Cubana de Medicina Tropical
            Rev Cubana Med Trop
            Centro Nacional de Información de Ciencias Médicas (Ciudad de la Habana )
            1561-3054
            March 2014
            : 66
            : 1
            : 148-151
            S0375-07602014000100014

            http://creativecommons.org/licenses/by/4.0/

            Product
            Product Information: SciELO Cuba
            Categories
            TROPICAL MEDICINE

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