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首页> 外文期刊>Zoologia (Curitiba) >Optimal foraging or predator avoidance: why does the Amazon spider Hingstepeira folisecens (Araneae: Araneidae) adopt alternative foraging behaviors?
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Optimal foraging or predator avoidance: why does the Amazon spider Hingstepeira folisecens (Araneae: Araneidae) adopt alternative foraging behaviors?

机译：最佳觅食或避免捕食者：为什么亚马逊蜘蛛兴步eira叶草（Araneae：Araneidae）采取其他觅食行为？

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摘要

Strategies that increase foraging efficiency may also increase predation risk. We investigated how individuals of Hingstepeira folisecens Hingston, 1932, which build shelters at the orb hub, modulate their foraging behaviors in response to the trade-off between capturing prey and becoming exposed by leaving their shelters. We evaluated whether the position of the prey on the web alters the frequency at which spiders leave their shelters. Hingstepeira folisecens spiders were more likely to capture prey positioned below than above the entrance of the shelter. Moreover, when the prey was near the entrance of the shelter, the spider pulled the threads with the entangled prey without leaving the shelter. Conversely, when the prey was distant from the entrance of the shelter, an "attack" behavior (leaving the shelter) was favored. We argue that the "pulling behavior" may be an adaptation to reduce exposure to predators.
机译：提高觅食效率的策略也可能增加捕食风险。我们调查了Hingstepeira folisecens Hingston（1932年）的个人如何在球体中心建造庇护所，并调节其觅食行为，以应对捕获猎物与离开庇护所而暴露之间的权衡。我们评估了猎物在网上的位置是否会改变蜘蛛离开庇护所的频率。 Hingstepeira folisecens蜘蛛更有可能捕获位于避难所入口下方的猎物。此外，当猎物在避难所的入口附近时，蜘蛛将缠着猎物的线拉出而没有离开避难所。相反，当猎物远离庇护所的入口时，则倾向于“进攻”行为（离开庇护所）。我们认为“拉动行为”可能是一种减少对掠食者的接触的适应措施。

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