Lima-Camara Tamara Nunes, Codeço Claudia Torres, Honório Nildimar Alves, Bruno Rafaela Vieira, Peixoto Alexandre Afranio, Lounibos Leon Philip
Programa de Computação Científica, Programa de Computação Científica.
Laboratório de Transmissores de Hematozoários, Laboratório de Transmissores de Hematozoários.
Mem Inst Oswaldo Cruz. 2013;108 Suppl 1(Suppl 1):18-25. doi: 10.1590/0074-0276130381.
Dengue is one of the world's most important mosquito-borne diseases and is usually transmitted by one of two vector species: Aedes aegypti or Aedes albopictus . These two diurnal mosquitoes are frequently found coexisting in similar habitats, enabling interactions between adults, such as cross-mating. The objective of this study was to assess cross-mating between Ae. aegypti females and Ae. albopictus males under artificial conditions and evaluate the locomotor activity of Ae. aegypti virgin females injected with male accessory gland (MAG) homogenates to infer the physiological and behavioural responses to interspecific mating. After seven days of exposure, 3.3-16% of Ae. aegypti females mated with Ae. albopictus males. Virgin Ae. aegypti females injected with conspecific and heterospecific MAGs showed a general decrease in locomotor activity compared to controls and were refractory to mating with conspecific males. The reduction in diurnal locomotor activity induced by injections of conspecific or heterospecific MAGs is consistent with regulation of female reproductive activities by male substances, which are capable of sterilising female Ae. aegypti through satyrisation by Ae. albopictus.
登革热是世界上最重要的蚊媒疾病之一，通常由两种病媒物种之一传播：埃及伊蚊或白纹伊蚊。这两种日间活动的蚊子经常在相似的栖息地共存，使得成虫之间能够相互作用，比如进行杂交交配。本研究的目的是评估在人工条件下埃及伊蚊雌蚊与白纹伊蚊雄蚊之间的杂交交配情况，并评估注射了雄性附腺（MAG）匀浆的埃及伊蚊处女雌蚊的运动活性，以推断其对种间交配的生理和行为反应。经过7天的接触，3.3%-16%的埃及伊蚊雌蚊与白纹伊蚊雄蚊交配。与对照组相比，注射同种和异种MAG的埃及伊蚊处女雌蚊的运动活性普遍降低，并且对与同种雄蚊交配具有抗性。注射同种或异种MAG所诱导的日间运动活性降低与雄性物质对雌性交配活动的调节一致，这些雄性物质能够通过白纹伊蚊的交配致倦作用使埃及伊蚊雌蚊绝育。
