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Tandem running by foraging Pachycondyla striata workers in field conditions vary in response to food type, food distance, and environmental conditions
Current Zoology ( IF 2.2 ) Pub Date : 2021-06-26 , DOI: 10.1093/cz/zoab050
Janiele Pereira Silva 1, 2 , Lohan Valadares 3 , Maria Eduarda Lima Vieira 1, 2, 4 , Serafino Teseo 5 , Nicolas Châline 1, 2
Affiliation  

Ants show collective and individual behavioral flexibility in their response to immediate context, choosing for example between different foraging strategies. In Pachycondyla striata, workers can forage solitarily or recruit and guide nestmates to larger food sources through tandem running. Although considered more ancestral and less efficient than pheromone trail-laying, this strategy is common especially in species with small colony size. What is not known is how the decision to recruit or follow varies according to the immediate context. That is, how fine adjustments in information transfer affect immediate foraging decisions at the colony level. Here, we studied individually marked workers and evaluated their foraging decisions when food items varied in nature (protein versus carbohydrate), size, and distance from the nest at different temperatures and humidity levels. Our results show that tandem run leaders and potential followers adjust their behavior according to a combination of external factors. While 84.2% of trips were solitary, most ants (81%) performed at least 1 tandem run. However, tandem runs were more frequent for nearby resources and at higher relative humidity. Interestingly, when food items were located far away, tandem runs were more successful when heading to protein sources (75%) compared with carbohydrate sources (42%). Our results suggest that the social information transfer between leaders and followers conveys more information than previously thought, and also relies on their experience and motivation.

中文翻译:

田间条件下通过觅食纹状蚌工人进行的串联跑步因食物类型、食物距离和环境条件而异

蚂蚁在对即时环境的反应中表现出集体和个人的行为灵活性,例如在不同的觅食策略之间进行选择。在 Pachycondyla striata 中,工蚁可以独自觅食,也可以通过串联奔跑招募和引导巢友寻找更大的食物来源。尽管被认为比信息素追踪更祖传且效率更低,但这种策略很常见,尤其是在菌落规模较小的物种中。不知道的是,招募或跟随的决定如何根据当前情况而变化。也就是说,信息传递的微调如何影响群体层面的即时觅食决策。在这里,我们研究了单独标记的工人,并评估了他们在食物性质不同(蛋白质与碳水化合物)、大小、以及在不同温度和湿度水平下与巢穴的距离。我们的结果表明,串联跑步的领导者和潜在的追随者会根据外部因素的组合调整他们的行为。虽然 84.2% 的旅行是单独的,但大多数蚂蚁 (81%) 至少进行了 1 次串联。然而,对于附近的资源和较高的相对湿度,串联运行更为频繁。有趣的是,当食物位于很远的地方时,与碳水化合物来源(42%)相比,前往蛋白质来源(75%)的串联跑步更成功。我们的研究结果表明,领导者和追随者之间的社会信息传递传递的信息比以前想象的要多,并且还依赖于他们的经验和动机。我们的结果表明,串联跑步的领导者和潜在的追随者会根据外部因素的组合调整他们的行为。虽然 84.2% 的旅行是单独的,但大多数蚂蚁 (81%) 至少进行了 1 次串联。然而,对于附近的资源和较高的相对湿度,串联运行更为频繁。有趣的是,当食物位于很远的地方时,与碳水化合物来源(42%)相比,前往蛋白质来源(75%)的串联跑步更成功。我们的研究结果表明,领导者和追随者之间的社会信息传递传递的信息比以前想象的要多,并且还依赖于他们的经验和动机。我们的结果表明,串联跑步的领导者和潜在的追随者会根据外部因素的组合调整他们的行为。虽然 84.2% 的旅行是单独的,但大多数蚂蚁 (81%) 至少进行了 1 次串联。然而,对于附近的资源和较高的相对湿度,串联运行更为频繁。有趣的是,当食物位于很远的地方时,与碳水化合物来源(42%)相比,前往蛋白质来源(75%)的串联跑步更成功。我们的研究结果表明,领导者和追随者之间的社会信息传递传递的信息比以前想象的要多,并且还依赖于他们的经验和动机。对于附近的资源和较高的相对湿度,串联运行更为频繁。有趣的是,当食物位于很远的地方时,与碳水化合物来源(42%)相比,前往蛋白质来源(75%)的串联跑步更成功。我们的研究结果表明,领导者和追随者之间的社会信息传递传递的信息比以前想象的要多,并且还依赖于他们的经验和动机。对于附近的资源和较高的相对湿度,串联运行更为频繁。有趣的是,当食物位于很远的地方时,与碳水化合物来源(42%)相比,前往蛋白质来源(75%)的串联跑步更成功。我们的研究结果表明,领导者和追随者之间的社会信息传递传递的信息比以前想象的要多,并且还依赖于他们的经验和动机。
更新日期:2021-06-26
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