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Cleaning Up After a Meal: The Consequences of Prey Disposal for Pit-Building Antlion Larvae

机译：饭后清理：坑蚁蚁幼虫被猎物处理的后果

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摘要

Predators use a variety of strategies for capturing prey. Trap-building predators can save on searching and encountering costs by investing in the construction and maintenance of traps such as webs and pits. However, what to do with partially consumed prey poses a potential problem. Antlion larvae (Myrmeleon acer) catch ants in conical pits, and dispose of partially consumed carcasses by flicking them a short distance away. We tested whether this prey-disposal behaviour affects the effectiveness of antlion pits. We observed ant behaviour around artificially constructed pits and compared falls into pits with clean margins to those with conspecific ant carcasses or control objects around the pit edge. The presence of objects near pits affected the behaviour of live ants, and reduced the effectiveness of pits. Live ants spent the most time examining fresh ant carcasses, but the presence of any object near pits deterred pitfalls. Ants fell into pits significantly more often when pit edges were clean, suggesting that antlions could incur a prey capture cost from flicking carcasses from pits as well as from the accumulation of other debris around pit margins
机译：捕食者使用各种策略来捕获猎物。建造陷阱的捕食者可以通过投资建造和维护陷阱（例如网和坑）来节省寻找和遇到的成本。但是，如何处理部分消耗的猎物会带来潜在的问题。蚂蚁幼虫（Myrmeleon acer）在圆锥形凹坑中捕获蚂蚁，并通过在短距离内轻拂来处理部分消耗的尸体。我们测试了这种猎物处置行为是否会影响蚁穴的有效性。我们观察到了人工构造的坑周围的蚂蚁行为，并比较了边缘清晰的边缘与具有同种蚂蚁尸体或控制对象的边缘干净的坑。坑附近的物体的存在会影响活蚂蚁的行为，并降低坑的有效性。活蚂蚁花费最多的时间检查新鲜的蚂蚁尸体，但是坑附近任何物体的存在都阻止了陷阱。当坑边缘干净时，蚂蚁掉落到坑的频率更高，这表明蚂蚁可能会因为从坑中甩出尸体以及坑边缘周围其他碎片的堆积而招致猎物捕获成本

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