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Ploy and counterploy in predator-prey interactions: Orb-weaving spiders versus bombardier beetles

机译:掠食者与猎物相互作用的策略和对策:织球蜘蛛与庞巴迪甲虫

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摘要

Bombardier beetles (Brachinus spp.) offered to orb-weaving spiders are either captured or lost, depending on the attack strategy of the spider. Nephila clavipes grasps a beetle directly and attempts to bite it outright, but is repelled by the beetle's defensive spray. As the spider recovers from the spray, the beetle makes its escape from the web. Argiope first imprisons the beetle by wrapping it delicately in silk, without causing it to spray. When the spider then proceeds to bite, the wrapping protects it against the full effects of the spray. The wrapping strategy may be generally effective against chemically protected insects, and it is suggested that this may be one of its principal adaptive justifications.
机译:提供给球形编织蜘蛛的庞巴迪甲虫(Brachinus spp。)可能被捕获或丢失,这取决于蜘蛛的攻击策略。 Nephila锁骨甲直接抓住甲虫并试图完全咬住它,但被甲虫的防御喷雾击退。随着蜘蛛从喷雾中恢复过来,甲虫使其从网中逸出。 Argiope首先将甲虫细致地包裹在丝绸中,而不致使其喷雾,从而将甲虫囚禁。当蜘蛛然后继续咬人时,包裹物可以保护蜘蛛免受喷雾的全部影响。包裹策略通常对化学保护的昆虫可能是有效的,因此建议这可能是其主要的适应理由之一。

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