Institut de Parasitologie et Pathologie Tropicale, UR7292 Dynamique des interactions hôte pathogène, Fédération de Médecine Translationnelle, Université de Strasbourg, F-67000, Strasbourg, France.
Syndicat de Lutte contre les Moustiques du Bas-Rhin (SLM67), F-67630, Lauterbourg, France.
J Insect Sci. 2021 Nov 1;21(6). doi: 10.1093/jisesa/ieab093.
Dispersion expands the distribution of invasive species and as such, it is a key factor of the colonization process. Aedes japonicus japonicus (Theobald, 1901) is an invasive species of mosquito and a vector of various viruses. It was detected in the northeast of France in 2014. The population of this species can expand its distribution by several kilometers per year. However, though flight capacities play an active part in the dispersion of Ae. japonicus, they remain unknown for this species. In this study, we investigated the flight capacities of Ae. japonicus in a laboratory setting using the flight mill technique. We evaluated the influence of age on flight. We recorded videos of individual flights with a camera mounted on Raspberry Pi. We extracted data on distance, duration, and speed of flight using the Toxtrac and Boris software. Our analysis showed a median flight distance of 438 m with a maximum of 11,466 m. Strong flyers, which represented 10% of the females tested, flew more than 6,115 m during 4 h and 28 min at a speed of 1.7 km per h. As suspected, Ae. japonicus is a stronger flyer than the other invasive species Aedes albopictus (Skuse, 1894) (Diptera: Culicidae). To our knowledge, this is the first flight mill study conducted on Ae. japonicus and therefore the first evaluation of its flight capacity. In the future, the flight propensity of Ae. japonicus determined in this study can be included as a parameter to model the colonization process of this invasive vector species.
扩散扩大了入侵物种的分布范围，因此它是生物入侵过程的关键因素。白纹伊蚊（Aedes japonicus japonicus）是一种入侵性蚊子，也是多种病毒的传播媒介。它于 2014 年在法国东北部被发现。该物种的种群每年可以扩大其分布范围数公里。然而，尽管飞行能力在白纹伊蚊的扩散中起着积极的作用，但对于这种物种，其飞行能力仍然未知。在这项研究中，我们使用飞行测功机技术在实验室环境中研究了白纹伊蚊的飞行能力。我们评估了年龄对飞行的影响。我们使用安装在 Raspberry Pi 上的摄像机拍摄个体飞行的视频。我们使用 Toxtrac 和 Boris 软件提取飞行距离、持续时间和速度的数据。我们的分析显示，中位飞行距离为 438 米，最大飞行距离为 11,466 米。10%的测试雌蚊为强飞蚊，它们在 4 小时 28 分钟内以 1.7 公里/小时的速度飞行超过 6,115 米。正如我们所怀疑的那样，白纹伊蚊比另一种入侵物种埃及伊蚊（Aedes albopictus）（双翅目：蚊科）飞得更远。据我们所知，这是对白纹伊蚊进行的第一次飞行测功机研究，也是对其飞行能力的首次评估。在未来，可以将本研究中确定的白纹伊蚊的飞行倾向作为参数纳入该入侵媒介物种的定殖过程模型。
