Active flight requires the ability to efficiently fuel bursts of costly locomotion while maximizing energy conservation during non-flying times. We took a multi-faceted approach to estimate how fruit-eating bats (Uroderma bilobatum) manage a high-energy lifestyle fueled primarily by fig juice. Miniaturized heart rate telemetry shows that they use a novel, cyclic, bradycardic state that reduces daily energetic expenditure by 10% and counteracts heart rates as high as 900 bpm during flight. Uroderma bilobatum support flight with some of the fastest metabolic incorporation rates and dynamic circulating cortisol in vertebrates. These bats will exchange fat reserves within 24 hr, meaning that they must survive on the food of the day and are at daily risk of starvation. Energetic flexibly in U. bilobatum highlights the fundamental role of ecological pressures on integrative energetic networks and the still poorly understood energetic strategies of animals in the tropics.

中文翻译：

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极端心动过缓的周期性发作抵消食果蝙蝠的高代谢

主动飞行需要能够有效地为昂贵的运动爆发提供燃料，同时在非飞行时间最大限度地节约能源。我们采用多方面的方法来估计吃水果的蝙蝠 (Uroderma bilobatum) 如何管理主要由无花果汁推动的高能量生活方式。微型心率遥测表明，他们使用一种新颖的、循环的、心动过缓的状态，可将每日能量消耗减少 10%，并在飞行过程中抵消高达 900 bpm 的心率。Uroderma bilobatum 以脊椎动物中一些最快的代谢结合率和动态循环皮质醇支持飞行。这些蝙蝠将在 24 小时内交换脂肪储备，这意味着它们必须依靠当天的食物生存，并且每天都面临饥饿的风险。精力充沛，在美国灵活。