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The mystery of how spiders extract food without masticating prey

机译:蜘蛛如何在不咀嚼猎物的情况下提取食物的奥秘

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摘要

Standard accounts of how spiders obtain food without masticating their prey are probably largely wrong. Species in the families Uloboridae, Thomisidae, Araneidae and Theridiidae do not inject digestive fluid into the prey's interior, nor do they suckfluids directly from its interior. Rather they regurgitate fluid onto the surface of the prey, and then suck it back up from there. Philoponella vicina and other uloborids are extreme in this respect: they wet the entire outer surface of the prey packagesimultaneously with digestive fluid, and their mouthparts often never touch the prey. Capillarity (along with digestion of prey membranes in Philoponella) is apparently responsible both for the dispersion of digestive fluid into the prey, and the exit of liquids from inside the prey.
机译:关于蜘蛛如何在不咀嚼猎物的情况下获取食物的标准解释可能在很大程度上是错误的。 Uloboridae,Thomisidae,Araneidae和Theridiidae家族的种不会将消化液注入猎物的内部,也不会直接从猎物的内部吸取流体。相反,它们会将水分重新流回猎物表面,然后从那里吸回。 Philoponella vicina和其他类卵生物在这方面是极端的:它们用消化液同时润湿猎物包装的整个外表面,并且它们的口器通常永远不会接触猎物。毛细作用(伴随着费洛佩氏菌中的猎物膜的消化)显然是造成消化液向猎物中扩散以及液体从猎物内部流出的原因。

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