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首页> 外文期刊>Journal of Medical Entomology >Role of habitat components on the dynamics of Aedes albopictus (Diptera: Culicidae) from New Orleans
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Role of habitat components on the dynamics of Aedes albopictus (Diptera: Culicidae) from New Orleans

机译：生境成分对新奥尔良白纹伊蚊（Diptera：Culicidae）动态的作用

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摘要

Monthly sampling of tyre pile populations of A. albopictus in Orleans Parish, New Orleans, Louisiana, USA, was done in 1995 to determine prevalence of ascogregarine parasites and changes in wing length. Prevalence of Ascogregarina taiwanensis infection was 100% in midsummer and decreased in the autumn and spring (60-70%). Wing lengths were longest in the spring and autumn and shortest in midsummer. The authors evaluated the effect of A. taiwanensis infections under high and deficient levels of leaflitter nutrients on mortality, development time, wing length and reproductive potential of a New Orleans strain of Aedes albopictus. Parasitism and deficient nutrients caused a 35% increase in the rate of larval mortality and significantly extended thedevelopment time of females. Parasitized adults were 5% smaller and produced 23% fewer eggs than unparasitized siblings. In addition, abnormal Malpighian tubule morphology and melanization of ascogregarines were seen in adults from nutrient-deficient microcosms. It was concluded that ascogregarine infections affect the dynamics of A. albopictus by increasing the mortality of immature stages when nutrients supplies are scarce, and by decreasing the reproductive capacity of females under high nutrient conditions.
机译：1995年每月对美国路易斯安那州新奥尔良奥尔良教区的白纹线虫轮胎桩种群进行抽样调查，以测定芦荟素寄生虫的患病率和机翼长度的变化。台湾Ascogregarina感染的盛行率在仲夏为100％，而在秋季和春季则有所下降（60-70％）。机翼长度在春季和秋季最长，仲夏最短。作者评估了高含量和不足水平的凋落物养分对台湾立枯病菌感染的影响，该疾病对新奥尔良白纹伊蚊菌株的死亡率，发育时间，翅长和繁殖潜力的影响。寄生和缺乏营养会导致幼虫死亡率增加35％，并显着延长雌性的发育时间。与未寄生虫的同胞相比，被寄生虫的成虫小5％，产卵减少23％。此外，在缺乏营养的微观世界中，成年人中观察到了异常的马尔皮基小管形态和黑色素皮质激素的黑色素化。结论是，高营养素感染会通过增加营养物质供应不足时未成熟阶段的死亡率，并通过降低高营养条件下雌性的生殖能力而影响白粉虱的动态。

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