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Why do fiddler crabs build chimneys?

机译:为什么招潮蟹会建烟囱?

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摘要

Chimneys are mud mounds built by fiddler crabs that encircle the entrance to their burrow. Their function in many species is unknown. In Uca capricornis, crabs of both sexes and all sizes build chimneys, but females do so disproportionately more often. There are no differences in the immediate physical or social environments between crabs with and without a chimney. Chimney owners spend less time feeding and more time underground than non-owners. We show experimentally that burrows with a chimney are less likely to be located by an intruder. It is possible that some crabs construct chimneys around their burrow to conceal the entrance and reduce the risk of losing it to an intruder.
机译:烟囱是由招潮蟹建造的泥土丘,环绕着洞穴的入口。它们在许多物种中的功能尚不清楚。在乌卡(Uca capricornis),各种性别和大小的螃蟹都筑起烟囱,但雌性的成蟹比例却更高。有和没有烟囱的螃蟹之间在直接物理或社会环境上没有差异。烟囱所有者比非所有者花费更少的时间进行喂养,而在地下花费更多的时间。我们通过实验证明,带有烟囱的洞穴被入侵者定位的可能性较小。某些螃蟹有可能在其洞穴周围建造烟囱,以掩盖入口并降低将其输给入侵者的风险。

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