Intraguild predators can have behavioral mechanisms to maximize foraging and/or avoid predation. However, there is a lack of information about the influence of such prey-predator interactions on the daily activity of the species involved. Therefore, we investigated the daily activity of two intraguild predators, Tityus pusillus Pocock, 1893 and Ananteris mauryi Lourenço, 1982, in the presence and absence of each other. Animals were observed in three experimental conditions, containing individuals of T. pusillus (control 1), A. mauryi (control 2), and both species (treatment). In addition, we evaluated the correlation between the number of active individuals with air temperature and humidity. Our results showed that T. pusillus and A. mauryi have similar daily activity between 18:00 and 05:00 h. However, T. pusillus was more active and shifted from a sit-and-wait hunting mode to actively hunting when in the presence of A. mauryi. In contrast, under predation risk, A. mauryi did not change its level of activity but became more vigilant by reducing the frequency of rest, hydration, and mating attempts. Activity of A. mauryi was positively correlated with air humidity whereas activity of T. pusillus was negatively correlated. This work highlights the influence of intraguild predators in the behavioral decisions during daily activities of each other, indicating adaptive behaviors in both prey and predator.

中文翻译：

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两个公会内食肉动物之间的食肉动物-食肉动物相互作用调节其行为决策

公会内部的捕食者可以具有行为机制以最大化觅食和/或避免捕食。但是，缺乏有关此类猎物与食肉动物之间的相互作用对所涉及物种日常活动的影响的信息。因此，我们研究了两个存在于公会中的掠食者，在彼此存在和不存在的情况下的日常活动，它们分别是Tityus pusillus Pocock，1893年和Ananteris mauryiLourenço，1982年。在三种实验条件下观察到动物，它们包含脓毒杆菌个体（对照1），毛霉曲霉（对照2）和两种物种（处理）。此外，我们评估了活跃个体数量与气温和湿度之间的相关性。我们的结果表明在18:00至05:00之间，脓杆菌和毛孢曲霉的日活动相似。然而，在存在毛孢曲霉的情况下，脓杆菌更活跃，并且从坐等狩猎模式转变为主动狩猎。相反，在有被捕食的危险时，毛孢曲霉并没有改变其活动水平，而是通过减少休息，水合作用和交配的频率来提高警惕。的活性A. mauryi呈正空气湿度而的活性有关T.毛霉呈负相关。这项工作强调了行内掠食者在彼此日常活动中的行为决策中的影响，表明了猎物和掠食者的适应行为。