BACKGROUND The interaction between gut bacterial symbionts and Tephritidae became the focus of several studies that showed that bacteria contributed to the nutritional status and the reproductive potential of its fruit fly hosts. Anastrepha fraterculus is an economically important fruit pest in South America. This pest is currently controlled by insecticides, which prompt the development of environmentally friendly methods such as the sterile insect technique (SIT). For SIT to be effective, a deep understanding of the biology and sexual behavior of the target species is needed. Although many studies have contributed in this direction, little is known about the composition and role of A. fraterculus symbiotic bacteria. In this study we tested the hypothesis that gut bacteria contribute to nutritional status and reproductive success of A. fraterculus males. RESULTS AB affected the bacterial community of the digestive tract of A. fraterculus, in particular bacteria belonging to the Enterobacteriaceae family, which was the dominant bacterial group in the control flies (i.e., non-treated with AB). AB negatively affected parameters directly related to the mating success of laboratory males and their nutritional status. AB also affected males' survival under starvation conditions. The effect of AB on the behaviour and nutritional status of the males depended on two additional factors: the origin of the males and the presence of a proteinaceous source in the diet. CONCLUSIONS Our results suggest that A. fraterculus males gut contain symbiotic organisms that are able to exert a positive contribution on A. fraterculus males' fitness, although the physiological mechanisms still need further studies.

中文翻译：

---

抗生素处理影响了苹果An（Anastrepha fraterculus）Brazilian-1形态型雄性肠道细菌的多样性和生理特性。

背景技术肠道细菌共生体和蝇科之间的相互作用成为数项研究的重点，这些研究表明细菌有助于果蝇宿主的营养状况和繁殖潜能。黄fra（Aastrepha fraterculus）是南美的一种重要的经济害虫。该害虫目前受到杀虫剂的控制，这促使了诸如无菌昆虫技术（SIT）之类的环境友好方法的发展。为了使昆虫不育技术有效，需要深入了解目标物种的生物学和性行为。尽管许多研究都朝着这个方向做出了贡献，但是关于黄曲霉共生细菌的组成和作用还知之甚少。在这项研究中，我们检验了肠道细菌有助于A的营养状况和生殖成功的假说。蝴蝶男性。结果AB影响了黄曲霉消化道的细菌群落，特别是属于肠杆菌科的细菌，肠杆菌科是对照蝇中的优势细菌群（即未经AB处理）。AB对参数的负面影响与实验室雄性的交配成功及其营养状况直接相关。AB还影响了饥饿条件下的男性生存。AB对男性行为和营养状况的影响取决于另外两个因素：男性的起源和饮食中蛋白质源的存在。结论我们的研究结果表明，黄曲霉雄性肠道含有共生生物，它们能够对黄曲霉雄性的健康产生积极的影响，